Timeline for how to Implement linear tetrahedral elements for finite element computations?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
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| Nov 1, 2020 at 17:13 | vote | accept | Deepak Garg | ||
| Nov 1, 2020 at 17:12 | answer | added | Deepak Garg | timeline score: 1 | |
| Oct 26, 2020 at 23:36 | history | edited | Deepak Garg | CC BY-SA 4.0 |
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| Oct 24, 2020 at 19:29 | history | edited | Anton Menshov♦ | CC BY-SA 4.0 |
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| Oct 24, 2020 at 15:28 | comment | added | Deepak Garg | @nicoguaro I have put the question with mathematical notations now. | |
| Oct 24, 2020 at 15:27 | comment | added | Deepak Garg | @ChennaK thank you for replying. I do not get segmentation fault. It is simply the simulation diverges as soon as I launch it. The same simulation works just fine with hexahedral elements. So surely the mistake is in the implementation of tetrahedral element. I have checked the Jacobean matrix for an element. It is positive and equal to the 6*volume. My doubt is specifically for computation of surface integral on face made by nodes 012; as the triangles 013, 123 and 230 are themselves master triangles while 012 is not. What will be the integration points and weights for the face 012? | |
| Oct 24, 2020 at 15:19 | history | edited | Deepak Garg | CC BY-SA 4.0 |
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| Oct 22, 2020 at 17:22 | comment | added | nicoguaro♦ | Some of those details can be in the form of mathematics. This site uses MathJax to render equations. | |
| Oct 22, 2020 at 17:17 | review | Close votes | |||
| Oct 24, 2020 at 19:29 | |||||
| Oct 22, 2020 at 10:59 | comment | added | Chenna K | Please provide more details about where your simulation crashes. Is it due to negative Jacobian or segmentation fault or something else? If it is seg fault, then it is easy to fix. If it is not seg fault, then compute the Jacobian for one element. It should match the volume of the element. By the way, you don't need four quadrature points for computing the Jacobian (or stiffness matrix) for 4-noded Tet element. One is enough. | |
| Oct 22, 2020 at 9:52 | review | First posts | |||
| Oct 22, 2020 at 17:22 | |||||
| Oct 22, 2020 at 9:51 | history | asked | Deepak Garg | CC BY-SA 4.0 |