I would like to know how to be able to foresee a result about a simulation such as stress distribution, deformartion, strain.
Here I have some pictures of a static structural analys of a steel chair subjected to a force applied along -Y axis over the seat. The feet of the chair are fixed supports (see image).
Regarding the deformation I expect greter values far form the fixed supports, thus around the tip of the chair, and minimal or null values in correspondence of the fixed supports. Is it right? this is the output
however why the seat is green coloured?
About the stress distribution what can I expect? Following the picture of the stress output,
why are the corners subjected to high stress? which should be the regions of hight stress? If the stress is force divided by area of applied load shouldn't it involve only the region where the force is applied?why is there some stress at the tip of the chair?
Furthermore, the strain
I know that the strain is the change in deformation divided by the initial length (Lfinal-Linitial)/Linitial. Thus shouldn't it be that:
if Lfinal >Linitial (tension, stretching) strain positive
if Lfinal =0 (no displacement) strain =-1
if Lfinal <Linitial (compression) strain is negative.
I know the picture shows the equivalent strain thus all positive, but it is correc to think that the strain should be present in correspondence of higher deformation? I can't explain the distribution of strain in the model.
Please, clarify my doubts. I would really appreciate!
Thank you for your time.