How Abaqus/standard (implicit) algorithm works

This video gives an introductory explanation on how ABAQUS standard solver algorithm, generally known as implicit solver, works in ABAQUS software. We also explain what step, increment, iteration and frame are.

[@ahmedabouseeda4549]

the best video I have ever seen to explain the main problem in Abaqus

[@hishamtariq7054]

Excellent explanation !

[@muhammadwaseem-xm2co]

Hello Everyone!
I have a hexahedral multi-block structured mesh in ICEM CFD, I got some results from this mesh.
Now, I have to do a mesh independence test.
Please tell me which is the correct way to increase the number of mesh elements:
Should I
1) Re-mesh the whole geometry with smaller element size
2) increase the number of nodes in each block.
3) increase the scale factor like 1.2 or 1.3 etc....
Thank you!

[@RiotGames-p6i]

What you are trying to study here is called Mesh Convergence. And checking for mesh convergence is basically reducing the mesh size to as small as possible that beyond certain size you won't see significant changes.
e.g. A cantilever beam model with 5mm mesh size will give von mises stress as 100Mpa, if you reduce mesh size further to 4mm, say stress is 105Mpa, at 3mm mesh size 106Mpa and at 2mm say you see stress of 106.2Mpa. In this case you can say your mesh is converged at 3mm size or model results are now independent of mesh .
But mesh convergence is not just about size, but also about quality of mesh, and how geometry is captured. So in your CFD case , assuming your current model has geometry captured perfectly (90-100% close to Geometry), you can just reduce mesh size to check mesh independence.

[@hcdeng1283]

Before watching this video, please read some textbooks about numerical analysis.