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Crystal plasticity

Shailendra's picture

Void growth and coalescence in hexagonal close-packed (HCP) single crystals

I am pleased to share our recent paper on the growth and coalescence of voids in HCP single crystals (Balaji Selvarajou, Shailendra P. Joshi, Amine Benzerga). 

https://www.sciencedirect.com/science/article/pii/S0022509618307300 

Abstract

 

Timothy Truster's picture

Open PhD position in multi-scale process modeling of titanium alloys at the University of Tennessee

We have an open PhD position starting in the Fall semester 2019 at the Computational Laboratory for the Mechanics of Interfaces at the University of Tennessee - Knoxville (http://clmi.utk.edu). The research topic centers upon the modeling of texture evolution during processing conditions of titanium alloys using dislocation density based crystal plasticity. Efficient computational algorithms will be pursued to couple the specimen/part scale and the mesoscale.

jsegurado's picture

PhD position in Multiscale mechanical modeling of metals , IMDEA-Materials Institute

IMDEA Materials Institute is non-profit research organization located in Madrid, Spain, to carry out research activities in Materials Science and Engineering. More information can be found 

jsegurado's picture

PhD and Postdoct positions in Crystal Plasticity, IMDEA-Materials Institute

Searching for PhD (thesis) candidate and Postdoctoral research associate, to work in Multiscale Materials Modeling, with special emphasis in crystal plasticity modelling with the finite element method.

Effect of Loading on Slipping of Crystal Planes

We know when a metal is subjected to proper loading, there exists plastic strain. A great part of plastic strain is developed from the slipping of the crystal planes of that metal in microstructure level. Now, when the load is uniaxial, it is simple to calculate the amount of shear strain acts on that plane. But, when the load is not uniaxial, the life is harder. It is very hard to calculate which slip plane feels how much shear strain.

WaiChing Sun's picture

Postdoc Position on computational mechanics of polycrystaline rocks

Dear colleagues, 

A postdoc position is immediately available in my research group. Experience on derivation, implementation, validation and verification of crystal plasticity model at finite strain is required. Knowledge on meshless method and/or phase field modeling is a plus but not required. 

For further information, please visit our research group webpage listed below. 

http://poromechanics.weebly.com/

mesarovic's picture

deadline for financial aid for the CISM summer course on Mesoscale models

This is a reminder that the deadline to apply for the financial aid for the summer course in Udine is approaching:  March 22. 

 

Short course at Centre International de Sciences Mechanique (CISM), Udine.

May 22-26, 2017

Lecturers:  S Forest, I Groma, D McDowell, S Mesarovic, J-N Roux, H Zbib

The flyer is attached.  Register at:   http://www.cism.it/courses/C1703/ 

mesarovic's picture

Short course: Mesoscale models: From micro-physics to macro-interpretation

Short course at Centre International de Sciences Mechanique (CISM), Udine.

May 22-26, 2017

Lecturers:  S Forest, I Groma, D McDowell, S Mesarovic, J-N Roux, H Zbib

The flyer is attached.  Register at:   http://www.cism.it/courses/C1703/ 

Summary 

JRF position at IIT Ropar

Job title: JRF

Minimum qualification: MTech in Mechanical/ Applied Mechanics or Equivalent.

or

Graduate degree (B.Tech.) in Mechanical/ Applied Mechanics with a valid GATE score.

Research area: Crystal Platicity, FEM

Salary: Rs 25000 per month + 10% HRA

Timothy Truster's picture

Two PhD positions in computational mechanics of materials at the University of Tennessee

Two PhD positions are currently available in the Computational Laboratory for the Mechanics of Interfaces at the University of Tennessee - Knoxville (http://clmi.utk.edu). Research topics are in the following areas:

1. Modeling of titanium alloys using dislocation density based crystal plasticity finite element method.

S. Beretta's picture

Simulation of crack growth in Ni-based single crystals

In a cooperative research between PoliMi and UIUC we have analyzed the crack growth in Ni-based single crystals:

http://www.sciencedirect.com/science/article/pii/S0142112316000840

 Crack growth experiments analyzed with DIC had shown relatively low closure levels respect to polycrystals. Crystal plasticity simulations with WARP3D have been able to simulate closure levels consistent with the experimental ones.

Karol Frydrych's picture

Polycrystal plasticity in Abaqus/Explicit

Choose a channel featured in the header of iMechanica: 

Hello everyone!

My goal is to model large plastic deformations of polycrystalline metals using crystal plasticity and ALE adaptive meshing. In order to do that I want to use VUMAT subroutine in Abaqus/Explicit, since as far as I understand Abaqus/Standard is not good for large deformations and it doesn't support ALE adaptive meshing for that purpose.

saberelarem's picture

Phase field modeling of damage and fracture in polycrystalline materials, support from the Chinese Scholarship Council

The ability of scientists and engineers to exploit, design and process new materials with improved properties has often been fundamental for the technological advances of societies. In fact, advances in many key domains like aerospace, automotive industry, energy, nanotechnology, rely on our ability to engineer new materials and to exploit their properties.

Timothy Truster's picture

Open PhD position in computational mechanics at the University of Tennessee

We have an open PhD position starting in either the Spring or Fall semester 2016 at the Computational Laboratory for the Mechanics of Interfaces at the University of Tennessee - Knoxville (http://clmi.utk.edu). The research topic centers upon the modeling of texture evolution in FCC and BCC metals using dislocation density based crystal plasticity.

Shailendra's picture

Post-doctoral, Research Associate positions in Failure Micromechanics

We have two research positions, available in November 2015, in the area of micromechanics of advanced structural steels. The first one is a post-doctoral research fellow (RF) position. An ideal candidate for this position must possess a PhD in mechanical engineering or related field with a strong background in computational materials mechanics. Experience of developing mesoscale methods such as dislocation dynamics or crystal plasticity and mesoscale fracture mechanics will be a definite plus. 

Hidroxid's picture

Assigning crystal plasticity material constants for one crystal with more than one element (default of Dr Huangs model)

Hi!

 

I am just a beginner in Abaqus UMAT and I have started working with Dr Huang's crystal plasticity UMAT in Abaqus.

When I am assigning one material constants for one element crystal it works but when I try to assign it to more than one element for one crystal (for example group of elements with same grain orientation) it give me error code 144.

Can anybody explain me the reason?

 

 

Thanks in advance,

Kind regards,

Omid

 

Justin Dirrenberger's picture

PhD position available in Computational Mechanics of Materials @ Arts et Métiers-ParisTech

A PhD scholarship is available at Paris Institute of Technology (ParisTech) to work on the computational mechanics of crystalline polymers.

See the file attached for description.

This project is conducted in collaboration with the Centre for Molecular and Macromolecular Studies / Polish Academy of Sciences in Lodz, Poland.

Timothy Truster's picture

Two PhD positions in computational mechanics at the University of Tennessee

Two PhD positions are currently available in the Computational Laboratory for the Mechanics of Interfaces at the University of Tennessee - Knoxville (http://clmi.utk.edu). Research topics are in the following areas:

 

1. Modeling of aluminum alloys using dislocation density based crystal plasticity methods.

2. Fracture in composite materials using a Discontinuous Galerkin method for debonding

 

UMAT Dr Huang's Crystal Plasticity Code: help

Dear all,

I want to implement Dr Huang's code for polycrystals. I am stuck at two issues. 

 

1. How do we define the orientation to each grain separately in the code ? (I believe we need to do it in texture.txti ?)  I am not able to understand the texture.txti file.

2. What else would be different for a polycrystal CP umat implementation?

 

I apologize if my doubts are too basic. Please assist.

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