Dear all,
Could anyone help to give me some advice on how to implement a kind of nonlinear interaction relevant to relative velocity in ABAQUS? The interaction force has a quadratic function with the relative velocity between two nodes. Thanks.
when all the inclusions with similar shape are embeded into the matrix, the
Mori_Tanaka effective Stiffiness/Compliance Tensor can be , respectively, given by
L ={∑cr(L0*+Lr)-1}-1-L0*
M={∑cr(M0*+Mr)-1}-1-M0*
where,
Can anyone show me the
positive definiteness of the Stress Polarization Tensor Pijkl, i.e.,
τij* Pijkl τkl*≥o,
and further,
τij* Mijkl τkl*≥τij* Pijkl τkl*,
Dear
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Dear colleagues,
I kindly ask for advice on the following problem:
I simulate the uniaxial compression of a heterogeneous cylinder representing bone. Thus, it is not the visible solid exterior rim of the bone, but represents a porous structure within the bone, so-called trabecular bone, see the figure underneath.
The simulation is done in ABAQUS. The sample contains 164175 elements of type C3D4. The heterogeneous, porous structure makes it impossible to use axisymmmetric elements. The constitutive behavior is ELASTIC.
may i know how to create extra element surrounding the model in the meshing in abaqus?
in my case, i want have the extra inactivate element (with zero stress, strains condition) surrounding my model for the inital step, and then activate the element for the continuos step if neccesary...
thank you
hi all,
i am very new to abaqus and i want to simualte sliding wear between a pin and a disc. i found from the literature that by using user subroutines we can calculate the wear. i am not getting how to use a user subroutine , can any one expain how to use user subroutines in the CAE. is there any simple example problems in understanding this user subroutine functions. thanks in advance.
Hello everyone,
I am currently writing a UMAT for non-linear viscoelastic materials. In order to do some verifications,
I need to be able to customize the time incrementation scheme. For example, the first increment would
have a time step of 1E-5s while the other increments would have constant time step of 1E-2s. I know this is not a
very straightforward problem, but I really need to be able to do that. I am currently trying to combine my UMAT with other subroutines
The Joint Research Centre of the European Commission,Insitute for Energy (IET), in Petten Nehterlands, is looking for a motivated scientist or engineer at post-doctoral level to work on characterization of primarily metallic materials for nuclear reactors using a combination of techniques such as scanning and transmission electron microscopy (SEM and TEM), energy-dispersive X-ray spectroscopy (EDX), Xray diffraction (XRD), and 3D X-ray tomography. (see attachment)
