Crystal plasticity

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.

Lorenzo Bardella's picture

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.

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.

Topic of interest include: a) biomechanics of injury at high-rate of deformation at multiple scales, b) multiscale dynamics of flexible armor, c) crystal plasticity and dislocation dynamics in electrically assisted deformation of metals, and d) multiphysics modeling of corrosion.

jsegurado's picture

Postdoctoral position at IMDEA Materiales (Madrid, Spain) in crystal plasticity finite element simulation of Ni-based superalloy

The research group of Multiscale Materials Modeling at IMDEA Materials Institute seeks a:
Postdoctoral Researcher (PhD in mechanical engineering or materials science)

(Ref: POST-MMM-01)


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.

It is showing error " Too many attempts were made for this increment". I have no idea where I went wrong as I just ran the UMAT with it's own physical model. Please can anyone provide me a running UMAT of Dr. Huang ? I think there is something I need to change. Also, guideline for learning UMAT will be a great help.


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. Those interested please contact

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; 

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.

RaminBabaei's picture

A crystal plasticity continuum theory with length scale dependent internal residual stress and free surface effect

The long range elastic interaction between dislocations is naturally accounted in
discrete dislocation plasticity through stress field of individual dislocation.
In addition, the dislocation boundaries elastic interaction is considered via
image stress superposition approach in the finite element framework. In current
study these interaction terms are considered in crystal plasticity framework
through length scale dependent internal residual stresses which are arise from

Mubeen's picture

Advanced Finite Plasticity Textbooks

While reading the article

"An alternative approach to finite plasticity based on material isomorphisms " (1999) by Prof. Bertram, the first thing that attracted my attention was the quote [by Prof. Naghdi (late)]:

 “there is some degree of disagreements on nearly all of the main constitutive ingredients and features of plasticity in the presence of finite deformation... Some of the issues of disagreements are of basic and fundamental importance.”

Tuncay Yalcinkaya's picture

Full scholarships available at European Commission funded workshop on physically based material modeling

European Commission' s JRC (Joint Research Centre) is organizing a workshop on physics based modeling of material properties and experimental observations in collaboration with METU (Middle East Technical University). The workshop will be held in Ankara on 22-23 October 2012.


The objective of the workshop, co-organized by Joint Research Centre of the European Commission and Middle East Technical University, is to discuss the present status of physics based constitutive modelling of metallic materials and associated experimental methods.

The Workshop is funded by the European Commission's Integration and Enlargment Programme.  There is no cost for attending the Workshop. A limited number of scholarships is available for participants from the target countries (see attached flyer).

Post-doctoral position on Crystal Plasticity Modelling of Deformation in Hexagonal Metals

A full-time post as a LATEST2 Research Associate is available for a 2 year fixed term subject to relevant skills and experience to work as part of the LATEST2 (Light Alloys Towards Environmentally Sustainable Transport: 2nd Generation) team in the School of Materials, University of Manchester. 

Post-Doc/PhD in mechanics of grain boundaries at Max-Planck-Institut für Eisenforschung, Düsseldorf

MPI für Eisenforschung, Düsseldorf, Department for Microstructure Physics and Alloy Design
Post-Doc or PhD Position: Characterizing and modeling the mechanics of crystalline interfaces

A solid background in physical metallurgy, polycrystal mechanics,
dislocation plasticity, continuum mechanics and proficiency in English
are required. Prior experience in microstructural characterization such
as EBSD or AFM is beneficial. Programming skills (Fortran, Python,
Matlab) and experience in numerical simulation and finite element
modeling are strongly appreciated.


Research Scientist at TU Bergakademie Freiberg

A research scientist position is available at TU Bergakademie Freiberg in the area of computational modeling of dislocation properties using either molecular dynamics, discrete dislocations or crystal plasticity. The research of the group focuses on dislocation properties at both the nanoscale and the microscale. The successful candidate should have a strong background in numerical modeling with demonstrated capability of innovative and independent research. Interested candidate should contact Sebastien Groh at:

Postdoctoral Position in Solid Mechanics

The Department of Industrial Engineering at the University of Pittsburgh anticipates an opening for a postdoctoral associate starting January 2012. The position’s primary area of research will focus on mechanics of micro-scale deformation processes and characterizing the thermomechanics of deformation at micrometer length-scales. Applicants with a strong background in computational solid mechanics and crystal plasticity will be preferred. 

Interested Applicants are requested to Email their CV to:  ravishm [at] pitt [dot] edu 

Suvranu De's picture

Postdoctoral postion in multiscale computational mechanics at RPI

There is an immediate opening for a postdoctoral research position in the Advanced Computational Research Laboratory at RPI, Troy NY to work on Multiscale Computational Mechanics. Encouraged to apply are creative, self-motivated candidates with a sound background in computational mechanics. RPI is home to the CCNI, one of the most powerful university-based super-computational research facilities in the world.

1.    PhD in Computational/Applied Mechanics/ Computational Materials Science or related topic.
2.    Sound background in nonlinear solid mechanics. Preference will be give to candidates with background in crystal plasticity.
3.    Sound background in FEM technology.

Combining UMAT with XFEM

Hi all,
I 'd like to ask whether anyone has applied XFEM for a user-material (UMAT). What is the process to do that? Could anyone provide some advice, documentation or guidelines?

All the best,

p.s. I 've heard that a UEL code is needed to couple XFEM with UMAT.

problem using crystal plasticity model in Abaqus via UMAT

I am trying to model polycrystal behaviour using Abaqus Umat via crytalplasticity . My Umat results for single crystal & about 5 grain, are reasonable, but when, I try to use more than 5 grain in each integration point  (polycrystal model) abaqus aborted with following message after about 15 increment:

Abaqus Error: The executable C:\SIMULIA\Abaqus\6.10-1\exec\standard.exe aborted with system error code 693...


I will be happy if someone guide me about this problem.

Voronoi tesselation

Dear all,

      I would like to ask you how is it possible to import into abaqus a 2-D or a 3-D Voronoi structure. so far I ve been able to create my grains into Matlab or fortran but I dont know how to import them into abaqus.

All the best,


Mubeen's picture

CISM Course: Plasticity and Beyond

Dear all,

please find information about the 5 day - course on Plasticity and Microstructures at CISM Udine, Italy.

The link is:

Flyer is attached.

Best regards,



Original post from CISM website:

Plasticity and Beyond: Microstructures, Crystal-Plasticity and Phase Transitions

June 27, 2011 — July 1, 2011


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