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i am still struggling with  defining an initial condition in vumat. i have defined mine like this:

STATEV(1:nstatev)=stateOld(KM,1:nstatev) 

          if (steptime .eq. zero) then

          STATEV(1) = 1.0d0

            STATEV(2) = 1.0d0

            STATEV(3) = 1.0d0

            STATEV(4) = 0.0d0

            STATEV(5) = 0.0d0

I'm using a damage evolution model in XFEM in order to model crack growth, however I am trying to identify the correct Mode I fracture energy for my problem. In particular there seems to be an issue with the units of fracture energy in ABAQUS.

I am using Damage for Traction Separation Laws, Maxps; Damage Evolution Type = Energy; Mixed bode behaviour = Power Law with power value 1; Now at the bottom what should be the input values of Normal Mode Fracture Energy, Shear Mode Fracture Energy 1st direction and Shear Mode Fracture Energy 2nd Direction.

Hi

I am studying the mechanical response (behavior) of an FGM ( Functionally Graded Material )material that has a varying properties in the x direction according to the following Young's modulus formula 

   E(x)=E0*exp(ß*x)  for: 0<x<L

with: ß the non-homogeneity parameter of the material 

Erdemir Laboratory at the Cleveland Clinic (http://www.lerner.ccf.org/bme/erdemir/lab/) has three positions for an upcoming project on the biomechanics of multi-layer tissue structures of musculoskeletal extremities with emphasis on computational modeling & simulation. The positions will initially be for a duration of one year with the possible extension to three years.

Dear Mechanicians,

ABAQUS has a number of little-known built-in material models that are not documented in the manuals.

They are accessible from https://www.3ds.com, follow the path "Support", "Knowledge Base" and search for "Built-in user material models for Abaqus/Standard and Abaqus/Explicit". Below is a text version of the output.

It may be that you need special rights on the site; these can be requested from your regional SIMULIA HQ.

A new paper by Chen et al.: Experimental research on bending performance of structural cable. In: Construction and Building Materials, 15 October 2015, Vol. 96, pp. 279-288. Equivalent bending stiffness has been obtained applying a force at midspan of simply supported, about one meter long, specimens. A number of tensile force levels have been applied (including zero). Non-linear force-deflection curves are shown.

Hi friends,

I want to model a sphere in APDL ANSYS. I should consult sphere for FGM material But I don't know how should write this part in APDL ANSYS.

please help me.

mina