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Hello, I want to implement the expression below in Abaqus analysis using the Umat subroutine. Matrix1 and Matrix2 are seconde order tensor A is a forth order tensor The : represent the contracted product Omega is the geometry How this can be implemented Thanks in advance for your response

Hello, I have a problem assigning Initial Solution-dependent State Variable to a particular group of elements In Umat. By adding lines in the *inp file: *Initial Conditions, Type=Solution,User [Elemet_set], Value(1)..., ..... and, from Abaqus documentation I see that the SDVINI subroutine can...

Doing a cyclic calculus in Abaqus and at the beginning of each cycle I apply an initial plastic strain, we know that when we apply initial plastic that implies the presence of stress resulting from the plastic deformation, but Abaqus always show initial stress null at the beginning of the cycle...

Hello, I have applied initial plastic strain in Abaqus using *Initial Conditions, type=Plastic strain and I want to use the corresponding initial stress value but Abaqus always initialize stress as zero despite the value of initial plastic? Can you help to overcome this problem, please? Thanks...

Hello all, I want to perform several analyses successively in Abaqus, in each analysis - except the initial one - I should update the plastic strain components from the results calculated in the previous analysis (extracted from .odb files). I Know how to initialize plastic strain components in...

Hello, engineers, Is there a way to calculate the residual stress in Abaqus? thank you for your help

Hello Engineer's, I'm having trouble to set the dissipation potentiel of Norton Hoff below (cf.Image) to model the viscoplastic reponse of structure in Abaqus. I want to know if programming UMAT It is the only way to overcome this problem? Thanks in advence for your help Regards,

Hello Mechanical engineers, I have computed a cost function J(x1,..xn) and her gradient J'(x1,..xn) defined over a volume using finite element analysis. so I have the value of these fields J and J' at n nodes (x1,..xn) in the geometry (integration point) and I have saved the data in a text...

Hello, Engineer and Mathematician programmer, I have computed a cost function J(x1,..xn) and her gradient J'(x1,..xn) defined over a volume using finite element analysis. so I have the value of these fields J and J' at n nodes (x1,..xn) in the geometry (integration point) and I have saved the...

Hello, Can we update Stran rather than Stress in Abaqus UMAT (attached image)? Thanks

Hello, Can anyone give me an idea of how to determine the tangent module of this behavior law: after simplification I found the equation system: and after using the central difference method the schema is: I would be so thankful if you can help me

Hello everyone, Can anyone help me to obtain the tangent matrix of this behavior law (to use in UMAT subroutine) and il would be so thankful? Thanks in advance

Hello everyone, Can anyone help me to obtain the tangent matrix of this behavior law (to use in UMAT subroutine) and il would be so thankful? Thanks in advance

Hello everyone, Can anyone help me to obtain the tangent matrix of this behavior law (to use in UMAT subroutine) and il would be so thankful? Thanks in advance

Hello everyone, Can anyone help me to obtain the tangent matrix of this behavior law (to use in UMAT subroutine) and il would be so thankful? Thanks in advance

Hello, I wonder if someone can help me to explain the difference between SENER and ALLSE in Abaqus? Thanks in advance for your help Best regards

Hello, Can someone help me with an example of UMAT code for perfectly plastic using Von mises criterion and I would be so thankful? Best regards

Hello friends, How to calculate residual stress in abaqus? Thanks for helping

Hello, How can we know the number of solution-dependent state variables when defining subroutine UMAT and the number of variable controlling element deletion?? the material is perfect elastic. Many Thanks for helping

Hello, I want to use a subroutine with Fortran in Abaqus and I get pein to run calculus. First, I have Abaqus 2016 already installed, then I install visual studio 2015 and intel parallel 2017. when I launch a job with subroutine Abaqus returns this error: "The Abaqus user subroutine library...