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Crystal plasticity

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:

 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 ( 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)



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,



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 ( 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.

Master/Ph.D position available in Aerospace Engineering at Texas A&M

A Ph.D. position is available at Texas A&M University in the Aerospace department to work on the Coupling between a microstructure-sensitive model and a phase-field model to predict the mechanical behavior/damage of a bi-phased materials: Application to Ni-based single crystal superalloy. More information are in the attached file.

jsegurado's picture

Reminder: Call for abstracts International Workshop on Computational Mechanics of Materials in Madrid, Spain on October 1st-3rd

This is a reminder to invite you to submit an abstract for the 24th International Workshop on
Computational Mechanics of Materials (IWCMM 24) in Madrid, Spain on October 1st-3rd.
The abstract submission will close in
less than 3 weeks.


Grants for 3rd International Workshop on Physics Based Material Models and Experimental Observations Cesme/Turkey 2-4 June

In 2012 and 2013 we organized very successful Workshops on
"Physics-based material models and experimental observations" funded
by the European Union's Enlargement programme. We cordially invite you to
submit an abstract to the 3rd International Workshop on Physics Based
Material Models and Experimental Observations
to be held on 2-4 June
2014 in Cesme-Izmir/Turkey.

Tuncay Yalcinkaya's picture

Full scholarships available at European Commission funded workshop on physics based material models in Izmir / Turkey

European Commission' s JRC (Joint Research Centre) is organizing the 3rd workshop on physics based material models and experimental observations ( in collaboration with University of Oxford, Max-Planck-Institut für Eisenforschung and Middle East Technical University. The workshop will be held in Izmir/Turkey on 2-4 June 2014.

Ph.D. position opened at the University of Brescia, Italy

The group of Mechanics of Solids and Structures at the School of Engineering at the University of Brescia (Italy) has an open PhD position. The appointment will begin on January 1st 2014 for three full years.

The following topics are of interest:

1. small-scale plasticity of metals, with emphasis on modelling the size effect through strain gradient plasticity theories and dislocation mechanics. 2. micromechanics of composite materials, with emphasis on modelling failure.

siddiq_qidwai's picture

Postdoctoral Positions in Computational Mechanics and Multiphysics at the US Naval Research Laboratory

The Multifunctional Materials Branch of the Materials Science & Technology Division at the US Naval Research Laboratory in Washington DC has an interest in postdoctoral associate candidates for several areas in computational mechanics and multiphysics.

ABAQUS model of polycrystal plasticity

Hi everyone 

I am learning the polycrystalline crystal plasticity and testing material in ABAQUS and UMAT. Now I am trying to build a RVE by using the truncated octahedrons as the grain shape or Voronoi tessellations.

For truncated octahedrons, I built a truncated octahedrons and assembled them into the grain aggregate in the .inp file, and assign orientations in the UMAT based on the part's name. However, I found it hard to define their interaction between grains. What is their interaction properties and how to define the contact pair in an automatic way?

Postdoc opportunity in the field of computational mechanics


New Technologies Research centre at the University of West Bohemia
(Czech Republic) invites applications for a Postdoctoral position in the
field of Computacional Mechanics of Materials. Highly motivated
individuals holding a PhD in Mechanics, Materials Science or closely
related fields are encouraged to apply.

Soud Choudhury's picture

Need help for running UMAT of Dr. Huang's single crystal

Hello Everyone,

I am a new member of imechanica. I have started to learn UMAT of Abaqus to model my material behavior ( Cu6Sn5, HCP) using crystal plasticity finite element model. I found Dr. Huang's single crystal UMAT to start learning UMAT and I thought that it would be a great guide to start though it is written for FCC mat. But unfortunately I was not able to run the UMAT with it's input file.

Position within ERC Strarting Grant MINATRAN in Univ of Erlangen

There is a postdoctoral research postition within Dr. K.E. Aifantis's ERC Starting Grant at the Univ of Erlangen. The project is concerned with examining dislocation_interface interactions through gradient plasticty and simulations. A PhD in materials engineering is required and publications in the field must be evident. If a good experimental candidate is found who can perform in situ TEM/nanoindentation experiments he/she will also be considered. The position needs to be filled asap and can be extended for 18 months.

siddiq_qidwai's picture

Determination of Representative Volume Element (RVE) based on Microstructure

Estimating the response of polycrystalline materials using sets of weighted statistical volume elements

Siddiq M. Qidwai, David M. Turner, Stephen R. Niezgoda, Alexis C. Lewis, Andrew B. Geltmacher, David J. Rowenhorst, Surya R. Kalidindi

Acta Materialia, 60, 5284–5299, 2012; 


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