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Also, in my models Elasticity decrease through thickness, and field variables should be arranged in ascending order. How can i fix this problem?

Thank you Bartosz for your perfect answer. I've read your other posts and I know you're doing great. I have another question: I'm verifying this USDFLD with song's umat in a cracked 3D plate. In .dat file both stress and strain are close together but displacement are different. what does this...

Hello Colleagues, I'm working on modeling a FGM plate in which Density and Elasticity Modulus changes through thickness of plate by an exponential function. The following USDFLD subroutine is copied from thread799-295995. I have some questions to complete this subroutine: 1. How Abaqus will...

thank you for answering. As i said how could i define the exponential change pattern? and if you have an example for implementation that your talking about, I would be grateful you could share it.

I really appreciate your help. Why temperature dependent? I think you mean that i use a field variable. and by the way, how could i define the exponential change pattern?

Thanks for your answer mustaine, I've read it but I didn't understand much.

Hello I need to write a subroutine (I guess USDFLD) in which the Elasticity Modulus and density change through thickness. Actually the subroutine refers to a FGM plate with a crack in it. In simple words from one side of a plate, E and density of ceramic reach to E and density of metal. The...

Hello friends, Here is the Abaqus user subroutine for Functionally Graded Material with direct integration method. This Umat is based on S.H.Song's Umat. Obviously the coefficient AAA in calculating E is the ratio of young moduli of two sides of the plate. With this method, one can change young...