Stress-Strain Relation
Stress-Strain Relation
(OP)
Hello I am a Nastran beginner. I am modeling wind blades using PCOMPG entry. I am using linear static solver (SOL 101). I request stress and strain outputs. However when I check the ply stresses and strains I have a problem with the stress strain relation. Normally Stress / Strain must give the Young's Modulus (E). But when I divide the computed ply stresses by computed ply strains I don't obtain E value of the material. The value I get is way different from E. Is this reasonable what might be the reason of that?
Thanks a lot in advance.
Thanks a lot in advance.





RE: Stress-Strain Relation
RE: Stress-Strain Relation
RE: Stress-Strain Relation
RE: Stress-Strain Relation
Strain-x * E = Fx - uFy - uFz
That's for isotropic materials. For orthotropic it get more complicated because you have Ex, Ey, and Ez. And we haven't talked about shear.
Look up hooke's law for orthotropic composites
http://www.efunda.com/formulae/solid_mechanics/mat...
Hope this helps.
RE: Stress-Strain Relation
RE: Stress-Strain Relation
I think you could use this link:
http://www.stressebook.com/engineering-resources/
www.stressebook.com
Stressing Stresslessly!