*************Regarding Remote displacement query***** Hello sir, can you please clearly explain the transient step where you used remote displacement and boundary conditions. I'm facing errors with that. Please do help me regarding this.
Thankyou very much for your tutorial. But, I have an error as below; *** ERROR *** CP = 2.219 TIME= 12:14:43 Element type 1 is not the same shape as SOLID226. Switching to a different shape is not allowed while elements of type 1 exist. Do you have any idea to fix it?
Note that the mesh you make has to be compatible with the element you want to use. For example, you need to have meshed Linear elements if you want to assign a Linear element type, and Quadratic if you want to assign a Quadratic element type. There is a setting under Mesh Details to specify Element Order. Don't assign a different element type in the mesh section!
Everything is super clear from the video.. But could you please explain the time step analysis part.. And how to change the analysis in case feed and rpm of tool changes?
Can you please upload the tutorial for Friction Stir Blind Riveting. Or suggest what modifications are required to be made in this tutorial to simulate Friction Stir Blind Riveting.
It's very easy. First: Apply an external point to couple the body with that point. Second: Apply external displacement to the external point in form of a time dependent table.
Excellent tutorial, thank you for sharing. Unfortunately, I keep getting this error Element 492 (type = 5, SOLID226) (and maybe other elements) has become highly distorted, any recommendations, please !!. Thanks
Ansys is very sensitive regarding mesh distortion. Unfortunately the error is caused by tool movement and pressure. Decrease the pressure, this could be reduce the distortion.
sir thanks for your great video but, i have a question,,,,,, i am trying by all the ways to let the body rotate but it don't ,,,,,, also solid 226 does not have rotation DOF,,,, also when i used pilot node as you do, it doesnt rotate too any help???
Can you tell me or give me a reference from where to understand what is "MPDATA,KXX,matid,1,16,19,21,24,29,30", and explain what does it mean by Temperature dependent values."
You can extract the kxx data from every material data website. It's a simple temperature table. Every temperature is bonded with a thermal conductivity value. You have to know the basics about tables and APDL commands before you try to script something.
Sir this error is showing up: Element type 1 is not the same shape as SOLID226. Switching to a different shape is not allowed while elements of type 1 exist. What to do?
There must be an error in your setup. Could be that you defined other elements in your model. Another mistake could be that you defined something in the mesh module, which is a direct contradiction to the APDL code. For this simulation only two elements are appropriate: SOLID226: 3D 20 Node Hex SOLID227: 3D 10 Node Tet
Can you tell me how exactly rmodif,cid,35,1000 works? What will the properties of the bond formed be? Will I obtain tensile strength of weld same as that of sheet metal?
Will the materials taken from "explicit material" work in transient structural? Im not sure how to add jhonson cook model. I dont see any option while defining material. Also does APDL snippet take precendance over already defined material properties?
I'm not sure about the explicit material. Try it to answer this question. When you add new material in the stand-alone "technical data" module you can choose JC plasticity. I think APDL snippets override the former data.
When I apply remote displacement to my tool the tool behaves in a weird way and starts getting smaller and bigger with time. What can be the problem here?(The tool starts to shrink or something)
Sounds like your boundary conditions are the problem. Maybe the rotational speed is too high. I wouldn't simulate the pin physically. Try to model the heat and pressure source as a moving load source, without a tool body. It saves you a lot of convergence issues.
If I make two deformable parts of aluminium for friction welding will I obtain results? I tried using most analysis setting from your guide. Also can you tell me if small sliding is on or off
Yes, it's possible. Small sliding is off because I used an old Ansys version for this simulation. I would suggest using small sliding to make the setup more robust.
Look at this: www.researchgate.net/profile/Chinmaya-Sahoo-2/post/How-to-carry-out-stimulation-of-friction-stir-welding-process-in-ansys/attachment/59d62cc0c49f478072e9e298/AS%3A273550475235328%401442230923998/download/How+To+simulate+a+Friction+stir+Welding+with+ANSYS.pdf
How can i solve these errors? It shows like "The value of TEMP at node 2306 is 4334353.01. It is greater than the current limit of 1000000 " film coefficients and "bulk temperatures are always positive"... What are the changes i need to do in my model? *** ERROR *** CP = 184.016 TIME= 17:57:12 Some of the element based thermal loads may be inappropriate. Check applied element loads carefully. Ensure that film coefficients and bulk temperatures are always positive. *** ERROR *** CP = 184.016 TIME= 17:57:12 Element 625 (type = 3, SOLID226) (and maybe other elements) has become highly distorted. Excessive distortion of elements is usually a symptom indicating the need for corrective action elsewhere. Try ramping the load up instead of step applying the load (KBC,1). You may need to improve your mesh to obtain elements with better aspect ratios. Also consider the behavior of materials, contact pairs, and/or constraint equations. Please rule out other root causes of this failure before attempting rezoning or nonlinear adaptive solutions. If this message appears in the first iteration of first substep, be sure to run shape checking of elements. *** LOAD STEP 2 SUBSTEP 1 NOT COMPLETED. CUM ITER = 119 *** BEGIN BISECTION NUMBER 1 NEW TIME INCREMENT= 0.35000E-01 FORCE CONVERGENCE VALUE = 0.5315E+08 CRITERION= 0.2632E+07 HT FLOW CONVERGENCE VALUE= 0.4827E-01 CRITERION= 0.8192E+05 DISP CONVERGENCE VALUE = 99.64 CRITERION= 5.084 EQUIL ITER 1 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= -99.64 *** ERROR *** CP = 200.125 TIME= 17:57:28 The value of TEMP at node 2306 is 4334353.01. It is greater than the current limit of 1000000 (which can be reset on the NCNV command). This generally indicates that there are no temperature constraints or convections applied. *** ERROR *** CP = 200.125 TIME= 17:57:28 *** MESSAGE CONTINUATION ---- DIAGNOSTIC INFORMATION *** If one or more parts of the model are held together only by contact verify that the contact surfaces are closed. You can check contact status in the SOLUTION module for the converged solutions using CNCHECK. *** ERROR *** CP = 200.125 TIME= 17:57:28 *** MESSAGE CONTINUATION ---- DIAGNOSTIC INFORMATION *** Rigid body motion can also occur when net section yielding has occurred resulting in large displacements for small increments of load or when buckling has occurred. You can plot the time history curve for node 2306 in the TEMP direction to check for stiffness (slope of the curve) approaching zero.
@@s.b.7808 actually we have rectified some of the errors, now it shows these errors. How can i rectify it? *** ERROR *** CP = 79.078 TIME= 18:09:41 Negative absolute temperature radiation element 2922. TOFFST or TUNIF must be positive. And where do i change the TOFFST or TUNIF?
Define the substeps for proper radiation calculation otherwise you may get negative values. Also, specify an initial temperature for the model around the expected temperature so the solution starts farther from zero. Make sure an offset temperature has been defined (TOFFST). TOFFST, VALUE Specifies the temperature offset from absolute zero to zero. VALUE Degrees between absolute zero and zero of temperature system used (should be positive). Notes Specifies the difference (in degrees) between absolute zero and the zero of the temperature system used. Absolute temperature values are required in evaluating certain expressions, such as for creep, swelling, radiation heat transfer, MASS71, etc. (The offset temperature is not used in evaluating emissivity.) Examples are 460° for the Fahrenheit system and 273° for the Celsius system. The offset temperature is internally included in the element calculations and does not affect the temperature input or output. If used in SOLUTION, this command is valid only within the first load step. This command is also valid in PREP7. TUNIF, TEMP Assigns a uniform temperature to all nodes. TEMP Uniform temperature assigned to the nodes. If a TEMP value is not specified, the uniform temperature is set to zero. Command Default Set the uniform temperature to the reference temperature (defined via the TREF command). Notes TUNIF is a convenient form of the more general BFUNIF command. In a transient or nonlinear thermal analysis, the uniform temperature is used during the first iteration of a solution as follows: as the starting nodal temperature (except where temperatures are explicitly specified [D, DK]), to evaluate temperature-dependent material properties. In a structural analysis or an explicit dynamic analysis, the uniform temperature is used as the default temperature for thermal strain calculations and material property evaluation (except where body load temperatures are specified (BF, BFE, BFK, LDREAD). In other scalar field analyses, the uniform temperature is used for material property evaluation. Because TUNIF (or BFUNIF,TEMP) is step-applied in the first iteration, issue a BF,ALL,TEMP,Value command to ramp on a uniform temperature load. When the TUNIF command is used in an explicit dynamic analysis, you cannot apply temperature loading via the EDLOAD,,TEMP command. Furthermore, temperature loading defined by TUNIF cannot be listed or deleted by the EDLOAD command. The command default sets the uniform temperature to the reference temperature defined via the TREF command only (and not the MP,REFT command). If using the command default to set the uniform temperature (to the reference temperature set via TREF), you can convert temperature-dependent secant coefficients of thermal expansion (SCTEs) from the definition temperature to the uniform temperature. To do so, issue the MPAMOD command. This command is also valid in PREP7. Use APDL snippets in the solver section But I guess you model lacks thermal boundary conditions, that should be the issue
Text: "An unknown error occurred during solution. Check the Solver Output on the Solution Information object for possible causes." Association: "Project>Model>Static Structural>Solution" error: For element type = 1 (SOLID186), KEYOPT(1) = 11 is invalid. sir how i can solve this issue
1. One or more contact pairs are detected with a friction value greater than 0.2. If convergence problems arise, switching to an unsymmetric Newton Raphson option may aid in convergence. 2. An unknown error occurred during the solution. Check the Solver Output on the Solution Information object for possible causes These are the 2 errors I am getting every time i have already given friction coeff to be 0.6 between sheets and sheet clamps. Please tell me where I am making the problem.
@@s.b.7808 The second error is: *** error *** element type 1 is not the same shape as solid226. switching to a different shape is not allowed while elements of type 1 exist. Please give some pointers for solution!
hello sir I am getting time step error : Invalid time step setting. Please review inputs for all load steps. you may use the worksheet view can you tell me the solution thanks
@@s.b.7808 sir same problem i am facing can you give me your mail id so i will send my ansys to you for correction.please sir i am very grateful to you
I am facing a similar time step error aswell. In case you’ve resolved it, kindly do help. I’ve tried to replicate the time steps exactly same as the video. However, the error hasn’t resolved.
Hello, I seem to have found the solution. I was struggling with this same error. I was simply inserting only the information given on his screen. But you have to go through all 8 steps and manually input the 'step end time', 'initial time step', minimum step time' and 'maximum' step time' for each step. Otherwise it only has data for the 8th step number and nothing for the first 7. You can check this by clicking 'Report Preview' then in the project tree click on 'Analysis Settings' and scroll down a bit to the table. If it shows a mismatch of values this may be the solution to your error.
*** error *** element type 1 is not the same shape as solid226. switching to a different shape is not allowed while elements of type 1 exist. Please help with this error 🙏
The element types are not matching. Don't assign another element type in the mesh module to the solid, it's creating a contradiction with APDL snippet.
Maybe your load is too rapidly applied, therefore try to increase the applied load gently. When only the tool is the problem you could play with the tool material data. In the first approximation, you should assume the tool undeformable body, namely: very high Young's modulus, negligible strain and negligible thermal expansion (combined with high thermal conductivity to minimize any thermal effects on it).
@@s.b.7808 when I apply remote displacement to bottom surface of tool, the tool does not rotate properly. It shows a change in shape. I think im making an error while applying remote displacement. Also how long did the solution take to process?
![Как устроены швейные машинки? [Veritasium]](http://i.ytimg.com/vi/FFW0GcMCgd0/mqdefault.jpg)
Awesome work and very helpful tutorial
Don't mention it!
That is what I am looking for!! Thank you so much
You're welcome,
it's nice to hear that my work is helpful.
I have a report but i am new. Could you please help me showing from beginning to end in ansys?
Yes it’s working quite fine !!
Thank you very much
Sir can u help in this simulation?
Very good tutorial. It’s so helpful for me
Thank you so much!! Helped me a lot
You're welcome
*************Regarding Remote displacement query*****
Hello sir, can you please clearly explain the transient step where you used remote displacement and boundary conditions. I'm facing errors with that. Please do help me regarding this.
great work..... god bless you...
Wowww, it’s awesome 👏
Your tutorial is so helpful
You're welcome,
it's nice to hear that my work is helpful.
Yeah it’s awesome 👏
Sir i contact u for help?
Awesome work and very helpful tutorial. Thank you very much much for this awesome work
Don't mention it!
Great video. Please make a tutorial from beginning to end. How to use on ansys.FSW simulation
Excellent tutorial
Great video! Could you make ansys tutorial for ultrasonic welding?
Amazing tutorial, thank you very much for sharing 👍
Very helpful tutorial
Thank you very much for sharing
You're welcome
Nice tutorial, very good!
Hey thank you very much for the help. I was successfully able to finish the project.
Awesome tutorial
Can you please make a tutorial on applying a nodal force(constant) one node at a time to a group of node's in ansys.
Super helpful tutorial
Excellent video. Thank you so much. Sir can you please make same video in deform-3D. Which is better deform or ANSYS?
Deform has the advantage of remeshing, this makes everything much easier.I would recommend deform for friction stir welding simulation
You're welcome
Thank you. Very useful
I have few doubts..
Sir please send me step by step procedure for FSW analysis in ansys
How to carry out FSW simulation with different RPM,Weld Speed and tool pin shape?
Different RPM and speed isn't such a problem, but different pin shape aka shoulder isn't possible with Ansys.
@S. B. thank you,
Your work helped alot
Very good work! Thanks for sharing
can you make a tutorial of FSW in ANSYS FLUENT using udf for material and thermal behaviour ?
Thankyou very much for your tutorial. But, I have an error as below;
*** ERROR *** CP = 2.219 TIME= 12:14:43
Element type 1 is not the same shape as SOLID226. Switching to a
different shape is not allowed while elements of type 1 exist.
Do you have any idea to fix it?
Note that the mesh you make has to be compatible with the element you want to use. For example, you need to have meshed Linear elements if you want to assign a Linear element type, and Quadratic if you want to assign a Quadratic element type. There is a setting under Mesh Details to specify Element Order.
Don't assign a different element type in the mesh section!
Everything is super clear from the video.. But could you please explain the time step analysis part.. And how to change the analysis in case feed and rpm of tool changes?
Hello, how are you? Could you make the model with the pin? i need to do it can you help me please?
Awesome job sir 👍👍👍
Can you please upload the tutorial for Friction Stir Blind Riveting. Or suggest what modifications are required to be made in this tutorial to simulate Friction Stir Blind Riveting.
Excellent tutorial, can we apply this for linear friction welding? How sinusoidal movement can be applied to the piece? Thank you...
It's very easy.
First: Apply an external point to couple the body with that point.
Second: Apply external displacement to the external point in form of a time dependent table.
@@s.b.7808 thanks for your kind reply. honestly, i need to simulate this case with Ls-Dyna. I have no idea how can I assign this point.
I never worked with Ls-Dyna, neither I don't know how to use this software nor can I give advice regarding this field
Wonderful Job! Tx
You're welcome
Yes indeed
Bro please tell me the beginning to end ,i am newly installed ansys
Excellent tutorial, thank you for sharing. Unfortunately, I keep getting this error Element 492 (type = 5, SOLID226) (and maybe other elements) has become highly distorted, any recommendations, please !!. Thanks
Ansys is very sensitive regarding mesh distortion. Unfortunately the error is caused by tool movement and pressure. Decrease the pressure, this could be reduce the distortion.
@@s.b.7808 Thank you for reply. Can I get your email please ? my email is odj3@scarletmail.rutgers.edu
sir
thanks for your great video
but, i have a question,,,,,, i am trying by all the ways to let the body rotate but it don't ,,,,,, also solid 226 does not have rotation DOF,,,, also when i used pilot node as you do, it doesnt rotate too
any help???
It's hard to say from the distance. Usually, it should work this way, because it's the standard way to set up those simulations.
Can you tell me or give me a reference from where to understand what is "MPDATA,KXX,matid,1,16,19,21,24,29,30", and explain what does it mean by Temperature dependent values."
You can extract the kxx data from every material data website.
It's a simple temperature table. Every temperature is bonded with a thermal conductivity value.
You have to know the basics about tables and APDL commands before you try to script something.
Sir this error is showing up:
Element type 1 is not the same shape as SOLID226. Switching to a different shape is not allowed while elements of type 1 exist.
What to do?
There must be an error in your setup.
Could be that you defined other elements in your model.
Another mistake could be that you defined something in the mesh module, which is a direct contradiction to the APDL code.
For this simulation only two elements are appropriate:
SOLID226: 3D 20 Node Hex
SOLID227: 3D 10 Node Tet
Very helpful for me
Can you make the video for FSW tool with cylindrical pin
Muthu Vaidyanathan it’s not possible due to mesh deformation. Ansys lacks remeshing mode. Use CEL formulation and Abaqus instead Ansys
@David Wiliams you are right. The pin is the problem. Ansys can't solve it.
I have followed all the said steps in ANSYS 19.2. But the tool isn't rotating at all. Can you please help me out here.
Can you tell me how exactly rmodif,cid,35,1000 works? What will the properties of the bond formed be? Will I obtain tensile strength of weld same as that of sheet metal?
It's the thermal bonding
Look at this:
www.ozeninc.com/tech-tip-bonding-adhesion-changing-contact-status-ansys-mechanical/
Will the materials taken from "explicit material" work in transient structural? Im not sure how to add jhonson cook model. I dont see any option while defining material. Also does APDL snippet take precendance over already defined material properties?
I'm not sure about the explicit material. Try it to answer this question. When you add new material in the stand-alone "technical data" module you can choose JC plasticity. I think APDL snippets override the former data.
@@s.b.7808 I can see other plasticity models like bilinear, multilinear isotropic hardening, anand viscoplasticity etc but not JC placticity
I can choose between 17 different plasticity models JC included. It's all in the Ansys WB module "technical data"
When I apply remote displacement to my tool the tool behaves in a weird way and starts getting smaller and bigger with time. What can be the problem here?(The tool starts to shrink or something)
Sounds like your boundary conditions are the problem. Maybe the rotational speed is too high. I wouldn't simulate the pin physically. Try to model the heat and pressure source as a moving load source, without a tool body. It saves you a lot of convergence issues.
@@s.b.7808 I will look into this. Thanks alot
Very helpful
Hi, is it possible to perform tensile strength test on this weld? Do I have to perform the test in the same simulation by adding additional steps?
Yes, it's possible.
@@s.b.7808 thank you
Sir I want to verify some results related to diffusion Bonding like final bond strength in ansys how should I approach please help
Look at this
www.ozeninc.com/tech-tip-bonding-adhesion-changing-contact-status-ansys-mechanical/
Very helpful work
Thank you
If I make two deformable parts of aluminium for friction welding will I obtain results? I tried using most analysis setting from your guide. Also can you tell me if small sliding is on or off
Yes,
it's possible. Small sliding is off because I used an old Ansys version for this simulation. I would suggest using small sliding to make the setup more robust.
@@s.b.7808 thank you
Hello, Can you please let me know what material I should assign to the parts and if any other properties are required.
Look at this:
www.researchgate.net/profile/Chinmaya-Sahoo-2/post/How-to-carry-out-stimulation-of-friction-stir-welding-process-in-ansys/attachment/59d62cc0c49f478072e9e298/AS%3A273550475235328%401442230923998/download/How+To+simulate+a+Friction+stir+Welding+with+ANSYS.pdf
@@s.b.7808 thank you
hello sir i solved it but error is accoured in the remote point please help me
How much time did ur PC took to solve this (neglecting specification of pc) ??
Maybe 12 hours
hi, i want to ask that if this model can be take to ansys FLUENT? thank you
Fluent is often used for FSW, look at the literature.
What can I do if I got error saying
Element type =1 (solid226), keyopt =1 is invalid
Try in material section
/PREP7
et,1,SOLID226
esel,s,mat,,matid
emodif,all,typ,1
emid,remove,all
et,matid,226,11
FINISH
@@s.b.7808 I have to add this before those commands which are given in the video? Because I'm still not getting how to solve this error
Implement it in the workpiece APDL command. Sometimes the mesh makes trouble, therefor use only a mesh size object and apply no element method.
Can u tell the Expression used from User Defined Results?
Look at this www.padtinc.com/blog/using-user-defined-results-in-ansys-mechanical/
How can i solve these errors? It shows like "The value of TEMP at node 2306 is 4334353.01. It is greater than the current limit of 1000000 "
film coefficients and "bulk temperatures are always positive"... What are the changes i need to do in my model?
*** ERROR *** CP = 184.016 TIME= 17:57:12
Some of the element based thermal loads may be inappropriate. Check
applied element loads carefully. Ensure that film coefficients and
bulk temperatures are always positive.
*** ERROR *** CP = 184.016 TIME= 17:57:12
Element 625 (type = 3, SOLID226) (and maybe other elements) has become
highly distorted. Excessive distortion of elements is usually a
symptom indicating the need for corrective action elsewhere. Try
ramping the load up instead of step applying the load (KBC,1). You
may need to improve your mesh to obtain elements with better aspect
ratios. Also consider the behavior of materials, contact pairs,
and/or constraint equations. Please rule out other root causes of
this failure before attempting rezoning or nonlinear adaptive
solutions. If this message appears in the first iteration of first
substep, be sure to run shape checking of elements.
*** LOAD STEP 2 SUBSTEP 1 NOT COMPLETED. CUM ITER = 119
*** BEGIN BISECTION NUMBER 1 NEW TIME INCREMENT= 0.35000E-01
FORCE CONVERGENCE VALUE = 0.5315E+08 CRITERION= 0.2632E+07
HT FLOW CONVERGENCE VALUE= 0.4827E-01 CRITERION= 0.8192E+05
DISP CONVERGENCE VALUE = 99.64 CRITERION= 5.084
EQUIL ITER 1 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= -99.64
*** ERROR *** CP = 200.125 TIME= 17:57:28
The value of TEMP at node 2306 is 4334353.01. It is greater than the
current limit of 1000000 (which can be reset on the NCNV command).
This generally indicates that there are no temperature constraints or
convections applied.
*** ERROR *** CP = 200.125 TIME= 17:57:28
*** MESSAGE CONTINUATION ---- DIAGNOSTIC INFORMATION ***
If one or more parts of the model are held together only by contact
verify that the contact surfaces are closed. You can check contact
status in the SOLUTION module for the converged solutions using
CNCHECK.
*** ERROR *** CP = 200.125 TIME= 17:57:28
*** MESSAGE CONTINUATION ---- DIAGNOSTIC INFORMATION ***
Rigid body motion can also occur when net section yielding has
occurred resulting in large displacements for small increments of load
or when buckling has occurred. You can plot the time history curve
for node 2306 in the TEMP direction to check for stiffness (slope of
the curve) approaching zero.
Hard to tell, try to ramp the load. Decrease the time step make. Maybe some thermal bc's aren't appropriate.. etc.
@@s.b.7808 actually we have rectified some of the errors, now it shows these errors. How can i rectify it?
*** ERROR *** CP = 79.078 TIME= 18:09:41
Negative absolute temperature radiation element 2922. TOFFST or TUNIF
must be positive.
And where do i change the TOFFST or TUNIF?
Define the substeps for proper radiation calculation otherwise you may get negative values. Also, specify an initial temperature for the model around the expected temperature so the solution starts farther from zero. Make sure an offset temperature has been defined (TOFFST).
TOFFST, VALUE
Specifies the temperature offset from absolute zero to zero.
VALUE
Degrees between absolute zero and zero of temperature system used (should be positive).
Notes
Specifies the difference (in degrees) between absolute zero and the zero of the temperature system used. Absolute temperature values are required in evaluating certain expressions, such as for creep, swelling, radiation heat transfer, MASS71, etc. (The offset temperature is not used in evaluating emissivity.) Examples are 460° for the Fahrenheit system and 273° for the Celsius system. The offset temperature is internally included in the element calculations and does not affect the temperature input or output. If used in SOLUTION, this command is valid only within the first load step.
This command is also valid in PREP7.
TUNIF, TEMP
Assigns a uniform temperature to all nodes.
TEMP
Uniform temperature assigned to the nodes. If a TEMP value is not specified, the uniform temperature is set to zero.
Command Default
Set the uniform temperature to the reference temperature (defined via the TREF command).
Notes
TUNIF is a convenient form of the more general BFUNIF command.
In a transient or nonlinear thermal analysis, the uniform temperature is used during the first iteration of a solution as follows:
as the starting nodal temperature (except where temperatures are explicitly specified [D, DK]),
to evaluate temperature-dependent material properties.
In a structural analysis or an explicit dynamic analysis, the uniform temperature is used as the default temperature for thermal strain calculations and material property evaluation (except where body load temperatures are specified (BF, BFE, BFK, LDREAD). In other scalar field analyses, the uniform temperature is used for material property evaluation.
Because TUNIF (or BFUNIF,TEMP) is step-applied in the first iteration, issue a BF,ALL,TEMP,Value command to ramp on a uniform temperature load.
When the TUNIF command is used in an explicit dynamic analysis, you cannot apply temperature loading via the EDLOAD,,TEMP command. Furthermore, temperature loading defined by TUNIF cannot be listed or deleted by the EDLOAD command.
The command default sets the uniform temperature to the reference temperature defined via the TREF command only (and not the MP,REFT command).
If using the command default to set the uniform temperature (to the reference temperature set via TREF), you can convert temperature-dependent secant coefficients of thermal expansion (SCTEs) from the definition temperature to the uniform temperature. To do so, issue the MPAMOD command.
This command is also valid in PREP7.
Use APDL snippets in the solver section
But I guess you model lacks thermal boundary conditions, that should be the issue
Text: "An unknown error occurred during solution. Check the Solver Output on the Solution Information object for possible causes."
Association: "Project>Model>Static Structural>Solution" error: For element type = 1 (SOLID186), KEYOPT(1) = 11 is invalid.
sir how i can solve this issue
Solid 186 is only a 3-D 20-Node Structural Solid, therefore KEYOPT(1) = 11 is not valid. Use Solid226 instead.
Thank you Sir,sir can you give me your email id
what do i do if i want to simulate the tool pin as well?
Use CEL approach or a cfd setup. If you have the possibility to use DEFORM you can model the FSW with Lagrangian formulation and adaptive remeshing
Awesome music
Can you tell me if there is a way to add jhonson cook model in transient structural?
It's already implemented in the material module.
@@s.b.7808 Isnt it the bilinear hardening model for sheets used?
Yes,
it's used in the APDL snippet. But you can use the material module to define the plasticity with Johnson Cook. APDL isn't required.
1. One or more contact pairs are detected with a friction value greater than 0.2. If convergence problems arise, switching to an unsymmetric Newton Raphson option may aid in convergence.
2. An unknown error occurred during the solution. Check the Solver Output on the Solution Information object for possible causes
These are the 2 errors I am getting every time i have already given friction coeff to be 0.6 between sheets and sheet clamps. Please tell me where I am making the problem.
The first error is clear, change the solver algorithm. The second ? The detail error description is announced in the solver output, could be anything.
@@s.b.7808 The second error is:
*** error ***
element type 1 is not the same shape as solid226. switching to a different shape is not allowed while elements of type 1 exist.
Please give some pointers for solution!
good.
You're welcome
Yes, indeed!
Can we simulate plunger along this simulation.
Not in Ansys, this requires CEL/ Euler or Lagrangian formulation with adaptive (re)meshing.
Not even with structural transient with apdl scripting and fluent CFD with UDF both in coupled analysis
@@s.b.7808or Abaqus is easy and convenient option for that
I mean not in Ansys structural. In CFX or Fluent, FSW is really simple.
2:33 how do I open this? and how do I get that basic model?
Open what? The geometry consist of two plates and a cylinder! Where is the problem?
hello sir I am getting time step error :
Invalid time step setting. Please review inputs for all load steps. you may use the worksheet view
can you tell me the solution
thanks
Something is wrong with your step definitions. The step setting seems inconsistent
@@s.b.7808 sir same problem i am facing can you give me your mail id so i will send my ansys to you for correction.please sir i am very grateful to you
sir my email id is ankitnitjsr12@gmail.com
I am facing a similar time step error aswell. In case you’ve resolved it, kindly do help. I’ve tried to replicate the time steps exactly same as the video. However, the error hasn’t resolved.
Hello, I seem to have found the solution. I was struggling with this same error. I was simply inserting only the information given on his screen. But you have to go through all 8 steps and manually input the 'step end time', 'initial time step', minimum step time' and 'maximum' step time' for each step. Otherwise it only has data for the 8th step number and nothing for the first 7. You can check this by clicking 'Report Preview' then in the project tree click on 'Analysis Settings' and scroll down a bit to the table. If it shows a mismatch of values this may be the solution to your error.
Can we do it this by adding pin
No, It's not possible. For this you need remeshing or CEL formulation
@@s.b.7808 thanks
*** error ***
element type 1 is not the same shape as solid226. switching to a different shape is not allowed while elements of type 1 exist.
Please help with this error 🙏
The element types are not matching. Don't assign another element type in the mesh module to the solid, it's creating a contradiction with APDL snippet.
When I try to do this my tool gets highly deformed and the solution stops. What can be the problem?
Maybe your load is too rapidly applied, therefore try to increase the applied load gently.
When only the tool is the problem you could play with the tool material data.
In the first approximation, you should assume the tool undeformable body, namely: very high Young's modulus, negligible strain and negligible thermal expansion (combined with high thermal conductivity to minimize any thermal effects on it).
@@s.b.7808 when I apply remote displacement to bottom surface of tool, the tool does not rotate properly. It shows a change in shape. I think im making an error while applying remote displacement. Also how long did the solution take to process?
Can u change the language in ansys to english and reupload it?
Sorry,
but that would imply a new installation of Ansys and a new setup and modelling.
You can't change the language within a project.
@@s.b.7808 can you give me the ansys file?
Solver output error ... How can i overcome it?
Depends on the specific error. There are a lot of possible error sources.
still confused sir
I need a tutorial about rotary friction welding please :(
Ok so I know I most likely will not get an answer but I need to completely understand fsw. I know nothing of the topic. Someone, enlighten me
Look at this en.wikipedia.org/wiki/Friction_stir_welding
sir please share pdf work bench . i am M.Tech schoolar
friction stir welding
sir without apdl
You can't do FSW simulation without APDL snippets, they are shown in the tutorial. Nothing is hidden.
Sir plz contact me i need ur help
@@s.b.7808 Sir can we do it in workbench Without apdl snippets?
I don't think that's possible
it is ok, i understood nothing!