Crystal plasticity

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

Submitted by Lorenzo Bardella on Tue, 10/29/2013 - 18:47

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

Submitted by Siddiq Qidwai on Mon, 10/28/2013 - 22:47

job

biomechanics

computational mechanics

multiscale mechanics

corrosion

Discrete dislocation modeling

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.

ABAQUS model of polycrystal plasticity

Submitted by lu_1989 on Sat, 06/22/2013 - 16:35

truncated octahedrons

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

Submitted by Jan Ocenasek on Mon, 03/04/2013 - 13:15

job

computational mechanics

ABAQUS

FEA

Crystal plasticity

Description

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.

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

Submitted by Soud Choudhury on Mon, 02/25/2013 - 19:03

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

Submitted by kaifanti on Wed, 11/14/2012 - 15:51

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.

Determination of Representative Volume Element (RVE) based on Microstructure

Submitted by Siddiq Qidwai on Wed, 10/10/2012 - 15:34

representative volume element (RVE)

statistical volume element (SVE)

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; http://dx.doi.org/10.1016/j.actamat.2012.06.026 

Postdoc opportunity in the field of computational mechanics

Submitted by Jan Ocenasek on Mon, 10/08/2012 - 12:11

job

computational mechanics

FEM

Crystal plasticity

Description

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.

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

Submitted by RaminBabaei on Wed, 09/12/2012 - 02:53

research

Crystal plasticity

Geometrically Necessary Dislocation Density

Nonlocal continuum theory

Internal stress

Free surface

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

Advanced Finite Plasticity Textbooks

Submitted by Mubeen on Wed, 09/05/2012 - 16:08

computational methods

finite plasticity

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.”

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