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Amorphous intergranular films as toughening structural features

Submitted by Zhiliang Pan on

The ability of amorphous intergranular films to mitigate damage formation at grain boundaries is studied with molecular dynamics simulations. We find that such films can alter both crack nucleation and crack growth rates by efficiently absorbing dislocations, with thicker films being more effective sinks.

2015 Melosh Medalist and Finalists

Submitted by John E. Dolbow on

 

The Annual Robert J. Melosh Competition for the Best Student Paper in Finite Element Analysis was held last Friday, April 24, on the campus of Duke University.  

The winner of the 2015 Melosh Medal is Maurizio Chiaramonte, from Stanford University, for his paper “The H-Version of the Method of Auxiliary Mapping for Higher Order Solutions of Crack Problems.”   

Maurizio was selected as the winner on the basis of both his written paper and his oral presentation.  The other finalists at the 2015 competition were:

(σ1-σ3) VS Axial strain in abaqus

Submitted by digvijay_kumar_singh on

 I am modeling drained triaxial compression test. I modeled soil as cylindrical part in abaqus. Bottom part of cylinder is fixed and on top displacement is applied. I used Dynamic/explicit steps. After running model and getting .odb file, couldn't match stress strain diagram from experimental results. I don't know whether i am calculating stress in right way or not. Can anybody guide me in this regard? Advanced thanks for your reply.
How to plot (σ1-σ3) vs axial strain in Abaqus?

viscoelastic modelling in abaqus

Submitted by h.civil on

hello

im a new abaqus user and i want to model a viscoelastic material (asphalt) in abaqus . i have uniaxial creep test data for characterize viscoelastic behaviour . my question is how can i enter viscoelastic parameters in abaqus?is there any way to put creep test data directely in abaqus??

in abaqus for modelling viscoelastic material in time domain there are three ways:

1)combined test data

2)shear test data

3)volumetric test data

JAM now publishes a new type of paper: A Perspective

Submitted by Yonggang Huang on

JAM now publishes a new type of paper -- A Perspective.  As invited by the Editor of JAM, the authors write a short (2~3 published pages) perspective paper on an emerging field, or an important new discovery, in mechanics.  The inaugural perspective paper, "Toughening Graphene With Topological Defects: A Perspective" by Dr. Teng Zhang and Prof. Huajian Gao from Brown University, was published in the May issue, 2015.  The PDF of the paper is attached. 

Postdoc/PhD Position available in Spring 2016

Submitted by wangsuny on

We are currently accepting candidates for 2 Ph.D. and 1 Postdoc positions in the Mechanical Engineering Department at the State University of New York, Stony Brook, working on the smart materials with application to energy harvesting, sensing and control.

 

Individuals with very good knowledge in the following area(s) are invited to respond.

o                     Vibration-based Energy Harvesting and Optimal Power Conditioning Circuit