Linear vs Nonlinear Buckling Model stiffness
Linear vs Nonlinear Buckling Model stiffness
(OP)
Say I have a buckling model with linear elastic material, and I have a similar model but with nonlinear material data and geometric nonlinearities - which model would most likely have the highest stiffness?
What effect would turning geometric nonlinearities on have on the stiffness of the model?
What effect would turning geometric nonlinearities on have on the stiffness of the model?
RE: Linear vs Nonlinear Buckling Model stiffness
I have seen your other posts on the subject and replied in one of them. But have you made any attempt to understand the differences between linear and non-linear buckling beside posts in this forum and the youtube-link you had in another tread.
Regarding your questions. In non-linear analysis the stiffness can be stress dependent. It can change due to cracking in concrete or due to yielding in steel. In linear analysis it is a constant.
Regarding geometry, again, no a simple question. It depends om what effect the deformations will have on the structure. For a wire, increasing the stress means higher stiffness and decreasing means the opposite.
I can't help but wondering, are you a student?
Thomas
RE: Linear vs Nonlinear Buckling Model stiffness
I think this analogy answers your question.
RE: Linear vs Nonlinear Buckling Model stiffness