Analysis of bolted Beam-Column assembly with Bolt Pretension load (Interaction in Abaqus Part - 02)
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- Опубліковано 4 жов 2024
- In this video tutorial I talked on -
1. Defining intersection (contact pair) in Abaqus/standard.
2. Defining Contact surfaces.
3, Defining pretension load on bolts.
4. Post-processing
For related questions & discussion you can contact me on 7891401376. or mail me gkn0504@gmail.com
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Very good instructional video. Detailed, but simple to understand - helpful.
The lesson is great. The background music is also great.
agree!! :) where do you study? I am currently a student at NanHang
First of all thanks a lot for uploading this very imp video nd replying to every comment and mail.
Always welcome.
I always try to reply..but sometimes i missed.
Dear Sir. I found your tutorials very good and helpful, go ahead!
Dear, Thanks for appreciation..!
Thank you for these great tutorials.
Always welcome dear. Go with more videos of channel..and you will find more information.
thanks a lot. really appreciate your efforts
Thank you very much for your video series. It is very educating
Welcome dear.
Very nice video on surface and interactions..your narration makes it even clearer.. Thanks and Keep posting such videos..
Welcome dear.
NICE ONE. USEFUL.
very nice tutorial thank a lot for your help
please let me know the section that you used in the vedio
I am learning abaqus and i need to simulate the same model connection
thanq for the video, very useful information
Welcome 😊
Thanks for support sir
Thank you for the fantastic video. I have three questions for you:
1) What is the distance between the interior surface of each bolt head and bolt nut? Is this distance exactly equal to the thickness of the plate + the thickness of the column flange or not?
2) What is the difference between the diameter of the bolt shaft and the diameter of the bolt hole? Does the bolt shaft have smaller diameter or it is exactly equal to the diameter of the bolt hole?
3) What will you do if the bolt is passing through 3 thicknesses (Double shear plate)? Do you still apply the pretension force at 50 percent or not?
Dear,
1. Yes, the bolt flange = thickness of plates in between. However, it should have some tolerance if u modelling things more exactly.
2. Bolt shank surface and plate hole having tolerance.
3. Bolt pretension produce tension in shank actually..number of plates will not affect its position. Pretension should be apply on mid untill shank area is constant.
SimTech05 Thank you very much for this great video, and you fast response.
Always welcome dear.
Good work
Very helpful
Thanks and welcome
Thank you so much for the wonderful explanation. One request is please also help us to download the your working models for practices, this will definitely help us
Dear,
Please follow the procedure with your own model.
Sir if any videos on fatigue analysis of headed stud shear connectors in steel concrete composite beams
No dear. I not uploaded such video.
Thank you for this educative tutorial. Please keep it up. When I try to add the pretensions load to my model, it doesn’t give me the selection method to select bolt shank surface like you did. Please can you tell me the reason?
Dear you may need to use independent instance. To know more about dependent and independent instance, please go through video in my channel - Dependent and Independent instance in Abaqus
ua-cam.com/video/bjNJvYyWXus/v-deo.html
Hello. I am at the beginning of abaqus learning. I just have a question: you practically created 1 bolt and the plates. You assigned them, but the assembly creates just in automatic? I saw many other tutorial where you have to do it literally manually.
Thanks for the answer
Dear,
Parts assembly excluded in video to minimize length of video. It was assembled before video.
first thanks for this tutorial it is very helpful, secondly How to obtain the bolt force evolution in the end plate steel connection. as you know abaqus can not give this data explicitly. is it a direct product of stress with bolt shank area or what?
Dear,
You can give output request for reaction force, on the required surfaces.
Very useful video. Thanks for sharing. I was wondering if it’s possible to perform a bolt pretension in Abaqus standard and then propagate it in Abaqus Explicit analysis.
Dear,
Back to back definition not possible...however You can call The abaqus standard result result in to abaqus explicit.
Similar kind of video I already Uploaded on my UA-cam channel.
@@simtech0598 Thank you very much again. I think you’re referring to ua-cam.com/video/h2UQxuWz_DI/v-deo.html where you speak about how to import results from explicit into explicit again. Very much appreciated and very useful. All the best.
Hi, how do you do? I would like to ask for a problem solving in Abaqus, that I haven’t been able to find in the web in general nor in YT. The statement of the problem I’m looking for is a pretty common one I guess, and it is a structure with a pre-tension in the cables, such as in a cable bracing or the ropes for stabilizing an antenna mast. The most similar thing I’ve found is bolt force, or node displacement in an intermediate step, or cooling a part of the wire as a step, but it’s not what I’m actually trying to simulate. Nor is the prestressed of wires in concrete. Any help on the matter will be appreciated. Thanks in advance.
Dear,
For such pretension loads you need to make presentation in step 1 then in step 2 use it for your next loacase.
@@simtech0598 Thank you very much. I'll give it a try since I don't handle much of this software. Not asking for a second answer, but I just mention an initial doubt I get is if in that way that you mention I can make the force interactive with the deformation, since it's not an external constant load; you know what I mean.
Anyway, thanks again. Saludos.
Can you please tell how to apply pre load in case of Screw type of bolts
In same way you can apply. Only you need to calculate the load first.
Nice work sir, the way you explain things are clear and good.
Thank you for your efforts.
Sir, I am working on the metal cutting operation (machining), I have a problem in defining the interaction module. (contact definition between cutter body and insert).
At first, I considered the insert and the cutter body together as a rigid body and the simulation went smoothly without any problem.
But in the case of deformable-body, I created a "tie" constraint between insert in order to make a rigid contact between insert and cutter body. And I have gave a "coupling" constraint for both insert and cutter body to a reference point which is in the central axis of the cutter body in order to give rotation and translation to the cutter body. at this moment I am facing few errors, the analysis is getting aborted with few errors.
So my question is can I use tie constraint and couple constraint together?
Thank very much for your time
Dear,
I can comment on error only after looking the errors. May i need to see files.
For such individual query in perticular model you can msg me, my contact details provided in discription.
have u solved your issue ?
can we perform this analysis in Abaqus Student version which is restricted to 1000 nodes?
Yes. Make sure coarse mesh with mesh limit.
Hello sir very nice video i have smillar model but i got an error "slave assembly bolt shanks has 136 nodes in common with its master surface shank hole" i dont know what to do. Initially they are not in contact but come in contact loading phase
Dear,
Probably you select same master and slave surfaces. Or some portion is common.
What a mesh!!
Hello sir i appreciate your simulation but can i measure the bolt force so as to calculate the amount pf prying force on the bolt
Dear,
it can me measure by check contact force on the specific region.
However we will get distributed force value..not point or line load as in theory.
My suggestion to give output request on perticular region which approximately lead the prying action.
Thank you sir
I Will try, I am interested on the same assembly, but with fire loading. do you have in suggesting or orientation
Dear,
You need to include thermal step.
Sir can we use this technique of tie constraint in shell plates??
Which technique ?
Tutorial was great, I just wanted to ask one thing, did you draw beam using 3d modelling or by wire and then assigned it I section ?
Dear,
It is 3D model. If you use 1d element with I section...you can't select faces of section.
Some doubts sir
1)while defining tie constraint you choose whole plate connected to beam(not the i-section surface connected on plate).is it ok to give tie to whole plate.
2) you didn't defined tie constraint for bolt(bolt head connected to plate+nut to plate)...is it ok to give pretension nd contct surface only?
Dear,
1. By name of beam i selected i section only during surface creation.
2. Tie means u r fixing the bolt head with respective surface, of course one can do this.
But in reality bolt head not fixed with respective surface it has some frictional contact..so better to use contact with friction.
@@simtech0598 In this regard..what is the reasonable contact friction value for this case?
It depends on parameters like material, surface finishing etc.
To find approximate value plz visit - www.google.com/amp/s/www.engineeringtoolbox.com/amp/friction-coefficients-d_778.html
@@simtech0598 Thanks a lot
Bro can u please tell me from where I learn the complete analysis of steel connection using bolt as well as weld.
Dear, All connections details available in Abaqus Documentation itself.
No other source.
Sir how can I get real fracture or rupture ???
Dear,
You need to feed damage material parameters. Follow the videos
ua-cam.com/video/8pbJ_I1d6tk/v-deo.html
ua-cam.com/video/A-mUnLGOm00/v-deo.html
how to connect rigid and deformable bodies using interactions?
Dear,
You can use tie.
@@simtech0598 ok. Thank you.
Sir, how can we select more than one surface (e.g as you selected bolt shank surfaces collectively under one command) I try to do by pressing ctrl but it does no work
Shift+MB1 - for Selection
Ctrl+MB1 - For Deselection
Sir please upload a video to show how to model this. It will be very helpful for begginers like me.
Dear,
Two extruded I section and bolt through revolve command only.
I suggest to learn CAD based command. There are lots of video already available. Otherwise, unnecessary this conceptual video become lengthy.
From where you get the "friction coefficient" = 0.3?
Rough Steel - steel surface with lubrication.
This is the general idea.. however one can take perfect value.
@@simtech0598 okk. Thanks for the reply.
@@simtech0598 how about bolt contact with concrete surface?
sir, can you explain what are the things we need to do in post processing, Example can you explain what are CSLIP, CSTRESS, CDISP, CFORCE, CSTATUS, CPRESS etc....Pl can you explain these terms in bolt pretension analysis.Thank you.
Dear,
Just Google them. All details already available.
Thanks for the tutorial. How can i contact You ? I'm doing a similar model for my phd and getting many errors trying to do that one from the video as test. Why did You set master surface as plate in plate->column connection?
Dear,
My whatsapp number and mail id given in each video discription.
Nice video.
Sir, how do you calculated the pretension force of bolt?
Dear,
Pretension is defined based on application i.e. how tight you nut-bolt is with assembly. In this case i took data from standard study (paper).
Thank you very much for your video. It is very helpful. I try simulate a similar problem, and i am interested about the warnings. Is there a way to know what kind of warnings at the running there were? Thank you for this video :)
Dear,
Warning may or may not important and can be associate with any portion of modelling..there is no such direct guidelines available..but many warnings we can visualise in post-processing for better understanding.
@@simtech0598 Sir! thank you so much!
Sir
Can we model bolt as shell element
Plz reply
Dear,
you cant model bolt with shell element unless you consider it as rigid bolt.
However you can model bolt as 1d element.
@@simtech0598 sir
Can we apply bolt pretension on 1 D element
Yes we can do.
Dear Sir...Thanks for a great video..I doubt something...based on your simulation,seems that the bolt shank and plate hole share a similar diameter.In this regard,u have applied element based surface fr contact interaction. Yet,based on actual cond. they are differ in diameter(normally 2mm gap tolerance).Thus,for this case do I need to apply "contact element" for the interaction surface. Further, under contact element which one should I chose either "gap contact element" or tube to tube contact element". Thanks in advance Sir.
Dear, if it is small tolerance then no extra introduction technique/element required.
@@simtech0598 Thanks..I have another question regarding step. I still unclear on how the step is work in abaqus. By refering ur video, u have assigned 2 steps which is pretension bolt step followed by the loading step. In this regard,in sequent, you hve asking the abaqus system to run pretension step first then followed by loading step. Let say, I wanted to include prestressed tendon force into the truss element on the model. Thus, the series of analysis step sequence will be 1.pretension bolt step 2. Prestressed tendon step 3. Applying the loading step...Am I right?Thanks sir.
Dear,
With Abaqus prestress loaf can be define only in initial step that is default created step.
2nd step is basically 1st step that created by you - Abaqus allow bolt pretension only in this step.
Now you can define more step.
where did you learn the theory to model connections using finite elements? any book?🙏
Dear,
Two book i always recommend -
1. Practice finite element analysis by Nitin Gokhle sir.
2. Concept and Application of FEA by Robert D. COOK
@@simtech0598 Thank you very much
Hi sir your provided online training class
Dear,
Occasionally i conduct Abaqus batch. Will start soon in few days. I suggest u to join Telegram and Facebook group to be updated. Link is in video discription.
Hello can you provide your model file? Would be great to try it
I'm sorry dear,
Where this file exists in my computer I don't know.