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I have a fundamental question.

We ahve read that, physically  the Von Mises yield criterion is arrived based on the assumption / experimental observations that for a multi-axial state of stress, yielding starts when the maximum distortional / shear energy in uni-axial / simple tension.

whereas;

Tresca’s yield criterion is based on the assumption / experimental observation that yielding starts when the maximum shear stress in the material equals the maximum shear stress at yielding in simple tension.

I am writing a script to create a parametric analysis of my model.
My problem is that it is composed by many different unit cells, so I need to merge all of them in an automatic way through the script.

I am using this script:

Hi

i wana model a shell loading with blast-pressure with function of time and location(x,y) thet at each step time, the amp and location area was could be determined.

what is the method of modeling of this force type in abaqus-python?

I will be developing constitutive material models into commercial FE codes for nonlinear elasticity and searching for good books to get started for computational aspects. There are many good books for computational plasticity but I did not find any for nonlinear elasticity. Suggestion for good books or references is welcome.

Hello everyone,

I am currently working on modelling ITZ zones in concrete 2D microstructure. ITZ is the cement paste zone near the surface of aggregate which differs in properties from bulk cement paste. The thichness of ITZ zone ranges from 10-50 micrometer (0.01 - 0.05 mm). The size of RVE I am using is 100X100 mm which makes ITZ a very fine detail in my microstructure. I have created a instance in abaqus merging all parts, Aggregate, ITZ and Matrix( Cement Paste).

I seeded the instance with using these parameter:

Global Size: 2

What is the difference between pure shea and uniaxial tension? How can we predict it experimentally?

Hi,

I has written a subroutine for the 'probabilistic damage model for the dynamic fragmentation in brittle materials,hild,advances in applied mechanics,2010'..The procedure I followed in UMAT subroutine is as follows:

Hi,

Does anybody know how to forward iMechanica posts, e.g. Job posts, to my e-mail?

That would be useful for those who prefers to view a specific post not all.

 I want to simulate a dynamic motion of a pipe under periodic displacement loads.

The whole periodic displacement loads was decomposed into 2 halves. The first half was from 0 at initial configuration to a middle configuration to final configuration, then the second half goes back from final configuration to middle configuration, to initial configuration (Fig.1). The displacement loads of these 4 configurations was given. Using Abaqus Explicit, the whole dynamic motion was simulated.

But, I find a problem as follow.

Hi,