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Abaqus thin walled tube crushing

Submitted by dorairaj.vijayan on
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Could anyone help me rectify the following error:

For a self contact surface, the facets of the elements in element set ErrElemFacetThick3d-Step1 are thicker than the edge or diagonal lengths of the facets. Use the MAXRATIO parameter on *SURFACE to allow automatic rescaling of the contact thicknesses where necessary for this surface. Refer to the status file for further details.

 

fast method for optimal experimental design

Submitted by LONGQ on
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uncertainty quantification
experimental design
Bayesian inference
sparse quadrature

Shannon-type expected information gain can be used to evaluate the
relevance of a proposed experiment subjected to uncertainty. The
estimation of such gain, however, relies on a double-loop integration.
Moreover, its numerical integration in multi-dimensional cases, e.g.,
when using Monte Carlo sampling methods, is therefore computationally
too expensive for realistic physical models, especially for those
involving the solution of partial differential equations. In this work,
we present a new methodology, based on the Laplace approximation for the
integration of the posterior probability density function (pdf), to
accelerate the estimation of the expected information gains in the model
parameters and predictive quantities of interest. We obtain a

obtain negative temperature in coupled temperature displacement analysis in Abaqus

Submitted by mohsen12 on
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negative temperature in coupled temperature displacement analysis in Abaqus

Hi

I used coupled temperature displacement analysis in Abaqus for simulation hot forming sheet but obtain negative temperature in coupled temperature displacement analysis in Abaqus.

I think maybe my contact or mesh is not correct.

my step type: Dynamic, Temp-disp, Explicit 

mesh type: S4RT

contact type: surface to surface(Explicit) Penalty method contact  with termal conductance

Please help me to solve this problem. 

 

connecting parts with different mesh densities in abaqus explicit

Submitted by Rex Bedzra on
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Hello everybody,

I am trying to apply the tie constraint to two parts with different degree of mesh density. This works fine but when I apply the penalty contact method with friction between the modified parts and a third part, I obtain the following message;

Abaqus Error: The executable explicit_dp.exe
aborted with system error "Illegal memory reference" (signal 11).
Please check the .dat, .msg, and .sta files for error messages if the files

General query regarding MLPG method

Submitted by Boddula Swathi on
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meshfree
MLPG

I have few general queries regarding MLPG meshfree method

1. Can the trial and test functions be taken same for solving a problem

2. In the problem if there are zones with different properties, for example different Coeffiencient of Permeability in the aquifers (Plan view-wise), how to handle the interface between the zones and assemble the global matrix

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