The following is taken from the book Concepts and applications of Finite element methods by Cook, Malkus and Plesha.
For bifurcation buckling, we have the following eigenvalue problem:
(K+Lambda Ksigma)delta d= 0
Hi to the community !
I would like to ask if anyone have some experience with stochastic finite elements in an industrial context ?
Would you know some software (free or commercial) package for stochastic finite elements ?
Why do I have the feeling that sfem methods which look to be very promising aren't used much in practice ? Am I wrong when I say that ?
Thank you very much for any help about that !
Thomas Laverne
Hello,
I would like to know how contact elements are different from " general "ie non contact finite elements.
Also I would like to know how Lagrange multiplier method is used in contcat analysis.
My understanding of the Lagrange multiplier is like this: when we have to impose a constraint equation
[C][D]=[Q] as constraint between DOFs, we incude a term Y*{[[C][D]-[Q]} where Y is the Lagrange multiplier ,in the potential energy functional and minimize the functional to get the algebraic equations.
I am trying to learn non linear FEA ( Newton Raphson method)and this is what my understanding is. Kindly advise if you think my understanding is correct.
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Hi, everyone
I am a student. I am dealing with a failure problem of brittle spheres. These have a lot of flaws inside.I did some compression tests. Single spheres are crushed by a pair of parallel plates. I got the crush load distribution (in terms of critical contact force).
My question is:
is there a failure criterion/model which relates to load(critical contact force), Youngs moduli and Poisson ratios of shpere and plates, radius and friction coefficient?
My doubt is in transient dynamic analysis.
take a simple model of 40*2*1 m dimensions.Applying brick45 material. with e=2.069e11N/m2
poissons ratio= .3
density= 7830kg/m3
first performing modal analysis with just arresting displacements in 1 side in subspace method and getting 10 sets of frequencies..
then performing transient dynamic analysis in mode superposition method with dynamic loads.and solve it
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