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Mechanics associated with grain-boundary diffusion and sliding in polycrystals and its application to nanocrystals

Submitted by Yujie Wei on

As stated by Richard Vinci and Oliver Kraft in the announcement of 2008 Gordon Research Conference on Thin Film and Small-Scale Mechanical Behavior, there is a compelling need to understand the critical roles of different deformation mechanisms in structures with small characteristic dimensions, like nanocrystals and thin films. We have recently studied deformation behaviors in nanostructured materials and thin films with deformation mechanisms including grain-boundary diffusion, grain-boundary sliding, and grain-interior plasticity. Some interesting mechanical phenomena associated with heterogeneous grain-boundary properties are found and summarized here.

A theory of coupled diffusion and large deformation in polymeric gels

Submitted by Wei Hong on

   A large quantity of small molecules may migrate into a network of long polymers, causing the network to swell, forming an aggregate known as a polymeric gel.  This paper formulates a theory of the coupled mass transport and large deformation.

Another "straightforward" calculation

Submitted by Biswajit Banerjee on

Following Andy's recommendation I have been reading Ellis Dill's Continuum Mechanics[1]. In page 75 of the book, we find the
well known result that the constitutive equation for an isotropic hypoelastic
material can be derived from a stored energy function only if



 

where and are the Lame constants.

Tenure Track Faculty Position in Advanced Materials at North Carolina State University

Submitted by Murthy N. Guddati on

The Department of Civil Engineering at North Carolina State University is inviting applications for a possible tenure-track position in the broad area of advanced materials. The solicitation is part of a broader search, with the goal of filling one or more positions in the department; please see the official advertisement at the end of this message. Note that the advertisement does not give any specific details about the desirable properties of the advanced materials applicant. They are summarized below.

Dislocations 2008 International Conference

Submitted by Cai Wei on

We are pleased to announce Dislocations 2008, an international conference on the fundamentals of plastic deformation and other physical phenomena where the dislocations play pivotal roles.  The conference will take place on October 13-17, 2008 at the Gold Coast Hotel, Hong Kong, China.  More information about the Dislocations 2008 conference can be found at the following web site:

2008 Gordon Research Conference on Thin Film and Small-Scale Mechanical Behavior

Submitted by Richard Vinci on

We are pleased to officially announce the

2008 Gordon Research Conference on Thin Film and Small-Scale Mechanical Behavior

July 27 - August 1, 2008 at Colby College, Waterville Maine