An absolute contribution sir, in the example for warpage, if you had shown how warpage was rectified on that curved surface, it would have been great for visually rectifying a problem with similar complexity. Thank U so much for presentation ❤️🙏
I assume this mesh quality is about 2D shell elements. 28:58 You mentioned that Tria elements are stiffer than Quard ones. What about 3D terta element? Do we need to avoid these tetra elements? Sometimes, I can say many times, complex geometry objects cannot be meshed with quad elements in 3D solid analysys.
Dear, 3D element qualities are mostly same as 2D element quality.. warpage, jacobian, aspect ratio, skew, minimum size etc. For 3D elements these properties need to be calculate on every face. If one face is fail due to any property it means whole 3D element is failed. Apart from these properties 3D element have few more..like volume skew, volume AR, tet collapse. Tetra elements not recommended until model is not much complex. Bcz 1. Stiffer behaviour than hexa 2. For same amount of volume/component more number of tetra elements required than hexa...that increase number of node and elements in system. Hence computational time increase. For complex models it always recommended to use second orde tetra to improve analysis accuracy, but computational time also increases dramatically.
sir,I am little bit confused that for 5188000 increments 1 sec is needed but for only 1000 increment 1.44 hr is needed. How these two time is differently run. How increase one time decrease the other computational time
Dear, Number of increment taken by Abaqus explicit also depends on total number of elements. Lets assume - You have only 100 element in model...so Abaqus explicit able to complete 10,000 number of increment in 10 sec. But on other hand if your model having 1000 element Abaqus Explicit able to complete only 1000 increment in 10 sec. In your case if only 1000 increment taken by Abaqus explicit in 1.44 hr... I'm sure you have lots of elements in your model...in lakhs.
@@arsitech-ltd I have been referring a book by Nitin Gokhale, 'Practical finite element analysis, it's on page number 100. Elements get transferred from global coordinate system to Local coordinate system(centroid). For faster calculations
Yes, Its true. All element level calculation (shape function) made with local coordinate system but to solve problem we need global stiffness/mass/damping of system..so they transfer to global coordinate system during solution procedure...and jacobian issue may arise.
Dear, Its completely dependents on size of object and what minimum element size you allowed. Surly your simulation will run. But how small the feature is which you want to capture is matter.
@@arsitech-ltd if few elements r not satisfying the criteria but still the failure of whole element on the model is showing zero percent can I continue or will I have to clear each and every elements
Thankyou so much for this informative video! Could you please tell what is meant by Error 20216(STR+216) and Error 20018(STR+18).I got these errors while solving in LSDYNA and don't know how to deal with it.
Stop adding background music long time ago. But cannot remove background music from existing videos. I believe without earphone the background music will be less disturbing.
Dear, You are watching old videos...I stopped adding background music long time ago, But cannot remove from existing videos. I suggest to listen without earphone.
![[CFD] Hexcore Meshes for CFD](/img/1.gif)
Thank you for covering the theoretical parts of the criterion. This reminds me how important the pre-processing is to deal with the accurate results.
Always welcome.
Keep knowledge sharing.
great video Sir!!! The explanation with the contour plots makes the explanation much more realistic and awesome.
Glad it was helpful!
Thank you for your good explanation.
I was searching for these details at multiple places. Your video gave all solutions in one place.
Always welcome dear,
Share with others.
Very helpful info and presented very well. Many thanks
Superbly Explained sir.
An absolute contribution sir, in the example for warpage, if you had shown how warpage was rectified on that curved surface, it would have been great for visually rectifying a problem with similar complexity. Thank U so much for presentation ❤️🙏
@15:13
A geometry with Higher curvature shown in LHS.
Meshed surface on RHS, red colour element represent warpage.
thank you for such a valuable and informative video, it really helped me in a big way
Welcome dear.
Great explanation. Thank you
Always welcome.
excellent sir
waiting for part 2
Really helpful.😊
Thank you so much
We need teachers like you
Dear,
Make sure you share this knowledge with others..!
Yeah I already did even before watching it😂
Great Contribution. Thanks a lot.
Always welcome. Keep sharing.
Good explanation!
Well explained Sir. Thank you
Well explained, sir
Keep watching other conceptual videos, go with playlists of channel.
explained very well. thank you
Thanks for appreciation, Keep knowledge sharing.
I assume this mesh quality is about 2D shell elements. 28:58 You mentioned that Tria elements are stiffer than Quard ones. What about 3D terta element? Do we need to avoid these tetra elements? Sometimes, I can say many times, complex geometry objects cannot be meshed with quad elements in 3D solid analysys.
Dear,
3D element qualities are mostly same as 2D element quality.. warpage, jacobian, aspect ratio, skew, minimum size etc. For 3D elements these properties need to be calculate on every face. If one face is fail due to any property it means whole 3D element is failed.
Apart from these properties 3D element have few more..like volume skew, volume AR, tet collapse.
Tetra elements not recommended until model is not much complex. Bcz
1. Stiffer behaviour than hexa
2. For same amount of volume/component more number of tetra elements required than hexa...that increase number of node and elements in system. Hence computational time increase.
For complex models it always recommended to use second orde tetra to improve analysis accuracy, but computational time also increases dramatically.
@@arsitech-ltdThank you very much for the further explanation. I will look and study about 2nd order tetra more.
thank you so much sir... nice video
Welcome dear,
Go through Hypermesh playlist..many more concepts you will find.
GREAT VIDEO! THANKS!!
Always welcome.
sir,I am little bit confused that for 5188000 increments 1 sec is needed but for only 1000 increment 1.44 hr is needed. How these two time is differently run. How increase one time decrease the other computational time
Dear,
Number of increment taken by Abaqus explicit also depends on total number of elements.
Lets assume -
You have only 100 element in model...so Abaqus explicit able to complete 10,000 number of increment in 10 sec.
But on other hand if your model having 1000 element Abaqus Explicit able to complete only 1000 increment in 10 sec.
In your case if only 1000 increment taken by Abaqus explicit in 1.44 hr... I'm sure you have lots of elements in your model...in lakhs.
Thank you for your job!
Always welcome dear.
19:06 In jacobian, element gets transform from the global to the local coordinate system. correct me if im wrong.
Local to global..not global to local.
To assemble individual element's stiffness matrix into a single stiffness matrix.
@@arsitech-ltd I have been referring a book by Nitin Gokhale, 'Practical finite element analysis, it's on page number 100. Elements get transferred from global coordinate system to Local coordinate system(centroid). For faster calculations
Yes,
Its true. All element level calculation (shape function) made with local coordinate system but to solve problem we need global stiffness/mass/damping of system..so they transfer to global coordinate system during solution procedure...and jacobian issue may arise.
Can chordal derivation be >0.2
Dear,
Its completely dependents on size of object and what minimum element size you allowed.
Surly your simulation will run. But how small the feature is which you want to capture is matter.
@@arsitech-ltd Thank for the reply
@@arsitech-ltd if few elements r not satisfying the criteria but still the failure of whole element on the model is showing zero percent can I continue or will I have to clear each and every elements
Thankyou so much for this informative video! Could you please tell what is meant by
Error 20216(STR+216) and Error 20018(STR+18).I got these errors while solving in LSDYNA and don't know how to deal with it.
Dear, im abaqus and hyperworks user. Not aware to LSdyna.
Thank you!!!
Thank you very much sir.
Always Welcome!
thanks
I would request please, not to keep background music - very distracting.
Stop adding background music long time ago. But cannot remove background music from existing videos.
I believe without earphone the background music will be less disturbing.
@@arsitech-ltd Without earphone outside disturbance is more
Hahaha...
the music is way too much irritating , please never ever give any kind of music please
Dear,
I stopped adding background music from long time.
Background music is the worst distracting thing in this video; please avoid doing that!
Dear,
You are watching old videos...I stopped adding background music long time ago, But cannot remove from existing videos. I suggest to listen without earphone.