We are looking for a highly motivated candidate for a PhD position between École des Ponts ParisTech and University of Pavia, starting October 2024. The position is part of the EU-funded project MISCEA, an ambitious multidisciplinary Doctoral Training Network under the Horizon-Europe Marie Skłodowska-Curie Actions COFUND.
A PhD position or a Post-Doc position, depending on the candidate skills are available in the Department of Sciences and Methods fo Engineering at the University of Modena and Reggio Emilia, Italy. The research project is in the smart composite materials design. The candidate will have to design and optimize a composite structure with embedded SMA for morphing application. Candidates should have possibly a strong background in mechanics, finite elements simulations and smart materials.
Dear Mechanicians,
time and again the question of SMA (shape memory alloy) modeling pops up.
In ABAQUS, you can achieve this only by (V)UMAT coding or by using the little-known built-in SMA model.
In the past I have frequently responded to queries on SMA modeling and could refer to a customer help site of SIMULIA. That site is down, regrettably.
I decided to post the files here to avoid responding with a longer explanation to every individual seeking assistance and uploading the files as E-mail attachment every time.
The superelastic response of NiTi shape memory alloys under various loading conditions is experimentally investigated using thin-walled tube specimens. The isotropic relation between the elastic and shear moduli of austenite and martensite as well as the von Mises stress and strain equivalency are also studied in uniaxial tension and pure torsion. In addition to proportional loading, several non-proportional loading experiments based on both force and displacement control modes are conducted.
A 3D constitutive model is proposed and verified with experimental data. Tension-torsion coupling effect and tension-compression asymmetry effect is investigate for tube shape memory alloy.
In this paper, a phenomenological constitutive
model based on microplane model is used to simulate tension, torsion and proportional tension-torsion on NiTi thin-walled tube. Validation of the
microplane model against experimental results in different loading conditions demonstrates
the capability of this approach.
This publication will benefit the numerical and experimental study on SMAs.
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1.
http://jim.sagepub.com/content/24/1/70.short
Saleeb, A. F., Dhakal, B., Padula, S. A., & Gaydosh, D. J. (2013).
Calibration of a three-dimensional multimechanism shape memory alloy
material model for the prediction of the cyclic “attraction” character
in binary NiTi alloys. Journal of Intelligent Material Systems and Structures, 24(1), 70-88.
2.
Dear all,
I' m trying to make a model in VUMAT for shape memory alloy based on Lagoudas 's thermomechanical constitutive model. It seems that It's necessary an iteration to evaluate the thermoelastic prediction.
My questions are : is it possible to use an iterative loop in the VUMAT or it's better to avoid it??Could someone suggest me a different way so that I can avoid the iterative loop?
Many thanks,
Cece
