Understanding and Dealing with Artificially High Stress Using Ansys Mechanical — Lesson 3
In this video lesson, we will show why artificially high stresses arise in structural finite element models. Typical cases of these are from point loads and constraints, re-entrant corners, over-constrain of the model, and sharp corners in contact. Knowing to look out for these and understanding how to address them will better equip us to use our simulation tools and interpret results properly. We deliver a short lecture, then get into Ansys Mechanical to illustrate the concepts on a mechanical part.
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0:00 - Intro
1:50 - Most Common Cases for Artificially High Stresses
2:19 - Artificially High Stress Due to Point Loads or Constraints
3:48 - Artificially High Stress Due to Sharp Corners or Edges
5:50 - Artificially High Stress Due to Contact with Sharp Corners or Edges
6:17 - Artificially High Stress Due to Over-Constraints from Improper Boundary Conditions
8:52 - Stress Singularity vs Stress Riser
11:18 - Specifying Local Mesh Sizing
15:47 - Scoping the Stress to the Region of Interest
21:17 - Applying Cylindrical Support
22:00 - Applying Elastic Support
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