Usually, taut helical strand bending is dealt with by decoupling axial load and bending analysis. In the attached report, based on a purely geometrical approach, it is shown that there is indeed some coupling, albeit small.
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Help needed!! in Abaqus
I have UMAT written to update stress and material tangent components for a user defined material model. I need stretch ratio as an input for my material model. For this I am using deformation gradient from UMAT. Problem is, when there is constant strain (strain rate = 0), for example when material stretched to 100% strain (rubber) and then held at that strain for certain time to see stress relaxation, the deformation gradient should give the same value of 100% strain, but to my surprise this is changing. Can any one help me with this.
dear all
do anyone know how to simulate the plasticity of orthotropic material in abaqus cae?
your help will be highly appreciated.
best wish
kenneth
I would like to share with you our recent paper published in the Journal of Applied Mechanics: J. Appl. Mech. 81(8), 081010 (Jun 02, 2014)
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Meeting |
2015 TMS Annual Meeting & Exhibition |
|
Symposium |
Advances |
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Sponsorship |
TMS |
HIGH
TEMPERATURE SYSTEMS FOR ENERGY CONVERSION AND STORAGE
TMS Division: Functional Material Division (FMD
formerly known as EMPMD)
FMD sub-committee: Energy Conversion and Storage
Organizers:
Hello,
I read that "In general, even if the materials on the micro-level are isotropic, the effective
material can show anisotropic behavior. A general anisotropic linear elastic material
may have twenty one independent material parameters.''
If I understand my results correctly then simple structures like ''ball in the unit cell'' result in orthotropic material.
I am a bit puzzled - what would be the simplest structure that would result in anisotropic material behaviour?
