Dear Ameen , how do you make the element of the tube more detailed at 1:21:25 and is there any other difference between that tube and the one you've been doing prior to that beside the element size. Because the energy graph i took from the bigger element tube is much more rigid and not as smooth, is the element size the reason why the curve would be like that? Thank you
Dear Heen, As I said in the video, everything is the same except the mesh size. If you see the steps of making tube, then you will see how to control the mesh size. You can reduce the DT value in database d3plot to get a smoother curve.
You can get the reaction forces at the support then using the analytical equations to find the shear force and bending moments. As far as I know, there is not other method.
Thanks for the reply. I have a circular hollow pipe. So if I want to get reaction at support, do I need to sum up all reaction forces of support nodes at circumference? But some nodes will have negative reaction and some positive. What to do in this case?
Hey Ameen, I really appreciate your LSDyna tutorials and its of a great help. Can you please let me know on what basis do we provide our TERMINATION TIME value? Does it depend on the size/velocity of our model? Thanks
hello, sir can you please make a tutorial on how to replace a part of an assembled model with another part and also on vehicle side crash analysis, that would be a life saver.
Hello Ameen, I'm trying to do Axial Crushing of a Cylindrical Aluminium tube in LS-Dyna. I've prepared the model and didn't get any good results so far with 2 different mesh sizes comparing to the experimental one as shown in the figure below. The dimensions of the tube are 2mm thick, outer diameter is 25mm and its 90mm long. The specimen is AW6060 T66. The impact is defined by a Velocity vs Displacement curve. The bottom plate is fixed in all direction and the tube is placed on top of it. The top plate is free to move in Z-direction. I've used MAT Rigid for the top and Bottom Plates and MAT 98 Simplified Johnson-Cook model for the Aluminium tube. However my simulation results don’t match with the experimental one(force displacement curve). Please can you help me out. If you can share ur email, I’ll send the keyword file and the experimental curve.
Thanks a lot for your videos. Could you please make a video about how to build a submodeling in Ls-Dyna?
Dear Ameen , how do you make the element of the tube more detailed at 1:21:25 and is there any other difference between that tube and the one you've been doing prior to that beside the element size. Because the energy graph i took from the bigger element tube is much more rigid and not as smooth, is the element size the reason why the curve would be like that? Thank you
Dear Heen,
As I said in the video, everything is the same except the mesh size.
If you see the steps of making tube, then you will see how to control the mesh size.
You can reduce the DT value in database d3plot to get a smoother curve.
Is there a way to get shear force and bending moment in LSDyna?
You can get the reaction forces at the support then using the analytical equations to find the shear force and bending moments. As far as I know, there is not other method.
Thanks for the reply. I have a circular hollow pipe. So if I want to get reaction at support, do I need to sum up all reaction forces of support nodes at circumference? But some nodes will have negative reaction and some positive. What to do in this case?
@@ManikMia You can check this video:
ua-cam.com/video/T3JB7gCrEBY/v-deo.html
@@AmeenTopa Thank you!
Dear Sir
How to apply udl load on like 6mtr lenth I beam
Please watch my video on Compression Test of Cylinder.
Thank you for all your videos, Excellent Professor!
Do you have any video tutorial for a self-weight object as a load ?
Hi Jose, you may refer to the examples in DYNAEXAMPLES website. I believe that have an example for gravity there.
Hello!
You can make a video about using parting blast model?
Thank you!
Hi Frank, I don't even know what is a parting blast model. :D
Link to download LS-DYNA:
getintopc.com/softwares/simulators/ls-dyna-free-download/
Hey Ameen, I really appreciate your LSDyna tutorials and its of a great help. Can you please let me know on what basis do we provide our TERMINATION TIME value? Does it depend on the size/velocity of our model?
Thanks
Yes. In impact analysis, it depends on the velocity.
@@AmeenTopa thank you so much Ameen!
Hello Ameen Great video, is other days video also uploaded?
Sorry, the other days are not uploaded due to confidentiality of the simulation.
Please send me the download link of ls-dyna full, thanks
Hi there, you can check LSTC website.
Link to download LS-DYNA:
getintopc.com/softwares/simulators/ls-dyna-free-download/
Can you add a tutorial about composite modelling in Ls-Dyna, please
Sorry Mert, I am not specialized in modelling composite structures as I have very limited knowledge about them.
Dear Mert,
Please check my tutorial on Concrete wrapped with Composite Laminates
How you add element deletion?
You may use the strain failure available in the material model. Alternatively, you may use add erosion.
Refer to my other video:
ua-cam.com/video/3a_T7Hh19gQ/v-deo.html&lc=z22lxlzwnpi5dpalvacdp43aob0smypffv3fwpjweudw03c010c.1515256246309239
hello, sir can you please make a tutorial on how to replace a part of an assembled model with another part and also on vehicle side crash analysis, that would be a life saver.
Hi there, check my tutorials on car collision.
PLZZ make a tutorial for EXPLICIT DYNAMIC ANALYSIS OF RACING CAR CHASSIS CRASH LS-DYNA
My first tutorial, it is explicit dynamic analysis impact. Same steps can be followed if you have car chassis crash.
Hello Ameen,
I'm trying to do Axial Crushing of a Cylindrical Aluminium tube in LS-Dyna. I've prepared the model and didn't get any good results so far with 2 different mesh sizes comparing to the experimental one as shown in the figure below. The dimensions of the tube are 2mm thick, outer diameter is 25mm and its 90mm long. The specimen is AW6060 T66. The impact is defined by a Velocity vs Displacement curve. The bottom plate is fixed in all direction and the tube is placed on top of it. The top plate is free to move in Z-direction. I've used MAT Rigid for the top and Bottom Plates and MAT 98 Simplified Johnson-Cook model for the Aluminium tube.
However my simulation results don’t match with the experimental one(force displacement curve). Please can you help me out. If you can share ur email, I’ll send the keyword file and the experimental curve.
Write down your email here and I will contact you.
Ameen Topa sanjay.sardiwal33@gmail.com
Thanks for your reply.
Sir can u please make a tutorial video on crack propagation of concrete beam in three point bending
suman reddy 154 no sir,i need help
Please check my video titled "Concrete and Wrecking Ball"