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Define anisotropic in thermoplastic  

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Hello All,
I am trying to model a viscoelastic thermoplastic composite in ABAQUS and I am going to use UMAT for defining the viscoelastic behavior for the material. But I need to define anisotropic viscosity which is higher in fiber direction compare to transverse direction. Id be appreciated if you could tell me how I can define anisotropic viscosity in ABAQUS?

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