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Plasticity

Postdoctoral position in Multiscale Modeling

Submitted by marisolkoslowski on
job
micromechanics
Plasticity
dislocations

The Computational Solid Mechanics group under the direction of Prof. Marisol Koslowski in the School of Mechanical Engineering at Purdue has an opening for a postdoctoral position in the area of multiscale modeling as part of the project “Plasticity in ultrafine grained materials” funded by DOE. A successful candidate is expected to have a strong background in computational solid mechanics and programming experience. While experience in plasticity using dislocation dynamics or phase field methods is a plus, all outstanding candidates will be considered.

Basic information about Plasticity

Submitted by Amit.Ranade on
education
Plasticity
book

Does anyone know of a simple book, approximately 50 pages or so, for plasticity?. I am looking for something that is similar to Morton Gurtin's "Topics in Finite Elasticty" published by SIAM. This book is an uncluttered treatment of finite deformation elasticity and was very useful for me during graduate work. I am NOT looking for 200-300 page texts, becasue I will never get around to reading them.

 -Amit 

Size effects under homogeneous deformation of single crystals: A discrete dislocation analysis

Submitted by PJ Guruprasad on
research
Plasticity
dislocations
Size effects

 doi:10.1016/j.jmps.2007.03.009

Mechanism-based discrete dislocation
plasticity is used to investigate the effect of size on micron scale
crystal plasticity under conditions of macroscopically homogeneous
deformation. Long-range interactions among dislocations are naturally
incorporated through elasticity. Constitutive rules are used which
account for key short-range dislocation interactions. These include

Does anybody have a simple example Program of bounding surface model, or electronic version of books reports..

Submitted by yannyin on
research
Plasticity
bounding surface model
modified cam-clay
soil mechanics

Hi, everyone

I just start my research on bounding surface model for soil mechanics. Does someone have documents about programming of bounding surface model for stress-strain behaviour with a piece of program? Thanks a lot for your help.

Initial stress and strain in ANSYS

Submitted by Michele Camposaragna on
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Plasticity
ansys
initial strain

Hi everybody,

 i?m simulating a manufacturing chain finite elements analysis. Every step of this chain have been developed by different software. I use ANSYS. Somoone know how to impose the initial strain and stress state deriving from previous simulations to my ansys model: I'm able to use INISTATE command but only stresses are imported, I loose initial strain info: are they important if my material is elasto plastic? how i can resolve the problem?

 

Thanks in Advance Michele

The factory idiom and material models

Submitted by Biswajit Banerjee on
computational mechanics
Plasticity
C++

I'm leaving the US in a couple of days and will probably take a hiatus of a few months from iMechanica.  Before I leave, I want to tell you about a C++ idiom that eases the implementation and use of multiple material models in a computational mechanics code.

Drucker Prager plasticity model for ceramics

Submitted by I. Mijangos on
Plasticity
ceramic
Drucker Prager

Hi everybody,

I am a phD student modelling the behaviour of the ceramics under nanoindentation using ABAQUS. I have read that Drucker Prager plasticity model is suitable for ceramics under indentation. To obtain these parameters ABAQUS users manual suggest doing a triaxial test, but I can not find any information relating triaxial test with ceramics (I only find it for soils and rock). Does anybody know another way  to obtain these parameters? Has anybody performed this test experimentally before?

 Thanks,

 Iratxe

Plasticity

Submitted by Ray_Lau on
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von mises

Dear all,

Do you have any reference about the theory of plasticity? Especially about flow theory and von Mises yield criterion?

For example if I have an effective stress - plastic strain relationship, and I after yielding, I increase my strain again, how can I obtain the increment of the plastic strain and the stress deviator tensor?

Thanks a lot.

Best,

Ray

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