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Hi everyone,

I am trying to solve a problem of twisting a hyperelastic material(compressible neo-hookean) in abaqus. 

The problem has been taken from 10.12.5 TWISTING COLUMN in the textbook NONLINEAR SOLID MECHANICS FOR FINITE ELEMENT ANALYSIS: STATICS (Javier Bonet,Antonio J. Gil,Richard D.Wood).

Lamda and mu are given as 100 each, so I have calculated the Neo-hookean coefficients for abaqus which came out to be C10=50 and D1=0.012

I am using abaqus static-general with time steps of 

*Step, name=Step-1, nlgeom=YES, inc=10000

The National Center for Additive Manufacturing Excellence (NCAME) at Auburn University is announcing for two fully-funded PhD positions in the area of structural integrity of additive manufactured (AM) materials/parts. These students will work under direction of Dr. Shamsaei from Mechanical Engineering Department. These opportunities include;
1- One PhD student is expected to work on experimental and analytical mechanics, additive manufacturing, fatigue testing and modeling, failure analysis, microstructural characterization, and fracture mechanics.
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If interested, please send your resume and a cover letter, briefly explaining your relevant experience and publications to Dr Vaziri (mzv0045 [at] auburn.edu).

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