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A forum to discuss structures and properties of materials

constitutive relations (stress-strain) for non-homogeneous materials?

Submitted by pvag on
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Materials Forum

Dear All,



I am student new to this field and I recently found this amazing forum. I have a question that relates to the basic understanding of deformable materials.



I would like to understand better or find references that talk about the constitutive relations (stress-strain) for materials with non homogenous material properties, for



example materials that might have modulus of elasticity of the form E(x), E(x,y), or even E(x,y,z).



First, is a material having E(x,y,z) an anisotropic material?



Modelling a Spring Shape Memory Alloy

Submitted by akinbala on
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Materials Forum

Hello,

I am a Masters student and I need to model a spring shape memory alloy in ABAQUS. I have found a UMAT file,however the file contains the geometry of a 1X1X1 cube. Does anyone have any idea of how I could copy the geometry of the spring(which i modeled in solidworks and imported to ABAQUS)into the input file of the cube,so that I could run the model in ABAQUS. I have tried this but ABAQUS is giving me errors

Or does anyone have any other idea of how I could model a Sping SMA in ABAQUS?

Thanks

Akin

 

Modeling the dynamic mechanical analysis of a single pulp fiber

Submitted by Al Taib on
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Materials Forum
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DMA
dynamic mechanical analysis
single pulp fiber
loss and storage modulus

Hi there,

 

I am trying to model the DMA test for single pulp fiber. In this research I can I assume whatever procedure or materials parameters I need, from an old PhD thesis I took some materials parameters for the cellulose, hemicellulose and lignin and by using the composite theories I calculated the stiffness matrices for each constituent I have and from there I calculated the stiffness matrix of the fiber, and of course calculated the longitudinal young’s modulus of the fiber at the room temperature.

 

AISI 4150 or DIN 50CrMo4 Steel Flow Stress Curve Data for Machining Simulation

Submitted by ashwin.devotta on
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Machining simulation
flow stress curve
AISI 4150 Steel
DIN 50CrMo4 Steel
Johnson Cook Model

Hi All,

I am into machining simulation of 50CrMo4 Steel in DEFORM 3D and I need the flow stress curve data for various temperature and various strain rates. I have searched in as many journals as possible, but in vain. It would be of immense help if some one could share the material model data with me.

Thanking you in advance

With Best Regards

Ashwin Devotta

ashwin.devotta [at] gmail.com 

i need help - LS-DYNA Tutorial wants especially composite impact analysis

Submitted by karthirajme on
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i need help - LS-DYNA Tutorial  especially composite impact analysis. so pls send a tutorial PDf file to my mail ID. karthirajme [at] gamil.com (karthirajme[at]gamil[dot]com)

More information about residual stress tester.

Submitted by ennio curto on
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WELDING AND RESIDUAL STRESS
Tester NDE Residual Stress
Residual Stress Measurement

More information about residual stress tester.





The residual stress in a metal do not depend on it hardness, but from the module of elasticity or Young module and from its chemical composition (density).

NDE residual stress

Submitted by ennio curto on
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Portable residual stress instrument ;NDE residual stress; welding and residual stress ndt

More information about residual stress tester





The residual stress in a metal do not depend on its hardness, but from the module of elasticity or Young module and from its chemical composition (density).

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