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no-tension material

no-tension material

no-tension material

(OP)
Hi

I would like to model soil continuum by plane42 in ansys, material model drucker-prager. but after initial solution I
realized that there are some tension stresses...Is there anyone who can help ?

I found this paragraph in book "The finite element methods Vol. 2" by Zienkiewicz O.C., Taylor R.L. (cited):

"it suffices to carry out the
analysis elastically and wherever tensile stresses develop to reduce these to zero. The
initial stress (modified Newton-Raphson) process here is natural and indeed was developed
in this context[102]. The steps of calculation are obvious but it is important to
remember that the principal tensile stresses have to be eliminated." - but how to eliminate this principal tensile stresses ?

ps : I hope it is clear enough and sorry for my english

RE: no-tension material

Hi

I don't know how great the tensile stresses are but if you take a look at the mohr-coulomb graf you can see that soil can have a little tensile stress.

Grtz
Garry

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