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Modelling a Spring Shape Memory Alloy

Submitted by akinbala on
Forums
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

 

ill-posed meshfree problem

Submitted by Olumide on
Forums
Ask iMechanica

Hi,

I'm looking to solve a problem in which although the position of a boundary or force-generating constraint is not known, the distance between the constraint and one other (usually a "neighbouring" particle -- whatever neighbour means ;) ) is known.

After much thought, I've concluded that the problem is a constrained energy-minimization problem. In other words, I need to find the arrangment of the particles such that the strain energy of the system is minimized and while constraint between the nodes is satisfied.

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

Postdoctoral and Graduate Assistant Positions immediately available in Penn State University

Submitted by liqun on
job

Postdoctoral and Graduate Assistant Positions are

immediately available to work on phase-field simulations of phase

transformations and microstructure evolution in metallic alloys or

oxides. Strong background in mechanics and thermodynamics of of solid

microstructures is a plus. If interested, please email a resume to

Professor Long-Qing Chen, Penn State University at lqc3 [at] psu.edu

Several questions for VUMAT

Submitted by meshfreer on

Hi all, I am a new ABAQUS VUMAT user. I am defining the material behavior in stamping of sheet metal through VUMAT. But there are several questions about VUMAT.



（1）accoring to the ABAQUS user manual，for plane stress problem，stressnew(nblock,ndir+nshr), where ndir=3,nshr=1, but in fact,there are 5 stress commponents: sigma_{11},sigma_{22},sigma_{12},sigma_{23},sigma_{31}.

how to match stressnew(*,i)(i=1,2,3,4) with the stress commponents: sigma_{11},sigma_{22},sigma_{12},sigma_{23},sigma_{31}?

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