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Hello all

 I am trying to model a composite material with different tension and compression modulus (elastic analysis).  Does anyone know how to do it ??

Thanks for help.

Hello,

I have a multiple part question:

Backgroud to Q#1& Q#2  My interest is in the full stress distribution through the cross section of a helical coil compression spring, including the effects of curvature that are often cited by Wahl, but reported only for maximum stress at the surface.  The coil is simple - constant wire diameter, coil diameter, and pitch.  I have been unable to come across the solution for the full stress distribution (analytical), although there are endless references to Wahl's correction factor for the maximum stress.

Dear all



When i assign the springs between pair points in two
plate over each other, the spring definitely acts in one direction only
(perpendicular to the plates), but they must be assigned in such a way
that the springs work in three orthogonal directions. it is important to
mention that the two plate is fastened using screws, where the spring
has been used for screw.

how can i overcome this problem?

Best Regards

can i use the equivalent plastic strain to evalute the state of the elements (yield or elastic) when the i use Mohr-Coloumb plasticity (Abaqus 6.6).

 i am asking this question because i made a model to simulate  the uniaxial compression test using mohr-coloumb plasticity, but i find that the equivalent plastic strain remain constant at all elements, i am sure that the it should change from the edged of the sample to the core of the sample.

hi my friends, i am new in Abaqus, while i am making a uniaxial compression test for coal  sample using Abaqus 6.6, the failure criteria is Mohr-coloumb plasticity, i know that the behavior of coal is strain softening. i should use this table to simulate the hardening/softening behavior of material.