tlaverne's blog

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NEi Software releases FEA for iPhone app

I see many interesting application for this embeded software !

www.canadianmanufacturing.com/design-engineering/cad-cam/nei-software-re...

 


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Solving Efficiently Neumann Problems

I would like to know simply how to solve efficiently elasticity problems with Neumann boundary conditions? Neumann bc implies that I have 6 null eigenvalues in 3D (3 in 2D) associated to rigid body modes  and iterative methods such has conjugate gradient are not likely to work (because the problem is no longer positive definite, but only semi-definite). Is there any way to use iterative solver anyway by filtering rigid body motions or something like that ? However has anyone a good idea to solve such problem? For now, fixing aribrarily the displacement of some nodes (3 in 3D but not aligned, 2in 2D) is the only way I see, but I would like to have your smart advise on the subject...

Thank you !


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New Method for Predicting and Describing How Materials Break

I saw this on Science Daily, anyone knows ?

www.sciencedaily.com/releases/2010/03/100329135101.htm


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Question about stochastic Finite Elements

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

 


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