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If common block can be used in UMAT for parallel computing

Submitted by Wang Guofeng on

Hello everyone

I wrote some codes with umat recently .  They can work well with single CPU. However, the results become very bad for several CPUs. 

I define a matrix with COMMON BLOCK and it seems that COMMON BLOCK can not be used for parallel computing. Are there any ways to resolve this problem?

I am not familiar with fortran.Someone told me that the matrix should be defined by MODULE. I don't know about this.

Please give some helps to me

 

regards,

 

Wang 

 

Faculty Positions in Aeronautics and Astronautics at Purdue University

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Two faculty positions at Assistant/Associate Professor lavels are open in the School of Aeronautics and Astronautics at Purdue University, West Lafayette, IN (https://engineering.purdue.edu/AAE). The positions are open to all specialties complementary to current AAE research areas.

using abaqus in sintering

Submitted by bangaram on
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hi, i am currently working on using abaqus software for solving sintering problems . i just want to know how i can introduce new parameters into abaqus so that by giving some eqns for those i can solve the values of final porosity, shrinkage etc that are not pre-determined in the abaqus . i want to know the porosity distribution  and shrinkage rate in a particular given problem as outputs . please help me out . thnq

implementation of nonlinear fem

Submitted by phunguyen on
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Hello everybody,

 In the implementation of nonlinear FEM, there are two ways, namely the Voigt notation and the full matrix notation. Obviously, using Voigt notation, one only stores vector instead of matrix. So, by using the symmetry of the Cauchy and second Piola Kirchhoff stress tensors, it is always possible to implement nonlinear FEM using Voigt notation. 

 So, my question is why the full matrix implementation still exists? It is mentioned in the famous book of Ted Belytschko. Only due to historical reason or there are some advantages? 

Faculty Position Open at The Johns Hopkins University

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The Johns Hopkins University, Department of Mechanical Engineering, invites applications for a full-time tenure-track faculty position in the general area of mechanics and materials. Modeling and simulations are of particular interest, but all outstanding candidates will be considered.

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