Hello everyone,

I am working right now on a plywood box simply supported by wedges under a uniform pressure of 1 MPa.

The pressure is applicated through a rigid shell part layed on the top of the box ( a surface to surface contact). The bottom of the box is on contact (surface to surface) with the rigid shell wedges (2 on the corner of the box and 1 on the middle).  

As a boundary condition, all the DOF's of the wedges are constrained.    

Firslty the Plywood box is squeezed under the pressure until she began to bounce back like a spring and separate from the wedges and flying somewhere!!

Hello Everybody

I'm currently working on on the tubular weld of joint modeling using ANSYS

Summary:

I am thinking of informally conducting a specific case-study concerning the FEA solvers. The reference problem is a very simple but typical problem from stress analysis, leading of course to the linear systems: Ax = b and Ax = Lx.

I seek advice as to what software libraries currently available in the public domain would be best to use---the ones that would be fastest in terms of execution time for the reference problem.

I have a personal and longer-term research interest with certain issues related to the solvers technologies.

Suggestions and comments are welcome!

(1.) The Reference Problem:

Hi,

I am new to Abaqus and I am trying to use it to model some industrial shells. According to some preliminar studies, the material has a mohr-coulomb plastic behaviour. Thus, I wanted to use shell elements, with a mohr-coulomb plastic material, but it seems that it is not possible in Abaqus.

According to the theoretical manual and the user manual (18.3.3-6):

"The Mohr-Coulomb plasticity model can be used with any stress/displacement elements in Abaqus/Standard other than one-dimensional elements (beam and truss elements) or elements for which the assumed stress state is plane stress (plane stress, shell, and membrane elements)."

Hello,

sorry for my bad english,

I want help for VUEL Abaqus subroutine, I don't no how to compute the time increment for stability for the shell structure.

 Thank u. 

Does anyone knows what's the theory of the element shell99 in Ansys? I tried to search in ANSYS Help, but didn't find anything. Is it kirchoff classical plates theory?

I have a doubt regarding the next situation: I'm using a 2D shell deformable part with a solid homogeneous section (plane stress/strain thickness ratio=100) in a standard analysis (static general/static Riks). Should be in this case my mesh always bigger or equal to 100?

Is the plane stress/strain thickness ratio size influencing the minimum finite element size in ABAQUS? 

How to connect a beam to a shell element in FEM and a shell to a solid? All the three differ in their dof's.