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Modelling a spring shape memory alloy

Submitted by akinbala on
research
Shape Memory Alloys

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

 

 

Temperature dependence of the thermo-mechanical properties of aluminum

Submitted by omidomid on
research
Temperature dependence ; thermo-mechanical properties ; aluminum

I'm looking for the thermo-mechanical properties of aluminum, such as  Young modulus, thermal expansion coefficient, thermal conductivity coefficient and poisson ratio as a function of temperature :

E=E0(1+E1*T+E2*T^2+E3*T^3)  ;  T: temperature in K

2D Contact Problem In AINDA84

Submitted by chenjinghao on
research
2D contact problem adina84

ADINA84 is an open source code which can solve contact problem.

My model is shown in the picture below：

 

Pipeline and seabed are both 2D 2-node beam element and seabed is rigid surface.

I define one contact pair,two contact surface and each surface has 99 nodes .Two surface's nodes have same coordinate.

The program'erro is"CONDITIONS OF CONTACT INADMISSIBLE DUE TO DETECTION OF GROSS OVERLAP".

 Who can tell me the reason？

modal damping ratio for viscoelastic material

Submitted by huangyun99 on
research

Hi, I am wondering if anyone can give me suggestion on the following problem.

 I would like to do Frequency response study on a viscoelastic material. The frequency response computation usually takes a modal damping ratio. However the viscoelatic material is defined by K (elastic bulk modulus), G0 (short-time shear modulus), Gi (long-time shear modulus) and Beta (decay constant).

Is there a way to find  the modal damping ratio from the time domain viscoelastic material parameters (K, G0, Gi and Beta)? E.g. in a FEM environment?

 Thanks.

Pros and Cons of element deletion in Abaqus

Submitted by priyadd84 on
research
Pros and Cons of element deletion in Abaqus

Hi all ... i have been doing element deletion extensively in my analysis but was wondering ... wat are the Pros and Cons of using this method. To my knowledge was wondering how the deleted mass and energy are conserved through out the analysis. Thank you all.

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