# research

## catastrophic behaviors

This blog is on catastrophic behaviors in nature.

## Size effect of energetic crystals in high explosives and solid propellants

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Energetic materials, such as solid propellants and high explosives, can be considered as composite materials with energetic particles embedded in polymeric binder matrix. These energetic materials display strong particle size effects. For example, large particles debond earlier than small ones in high explosives.

## New Biomechanics Journal

A new journal has been started, "Journal of the Mechanical Behavior of Biomedical Materials," to be published by Elsevier from November, 2007. From the Journal's website:

## Arbitrary Lagrangian Eulerian modeling in large strain solid mechanics problems

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I am interested in Arbitrary Lagrangian Eulerian formulation in modeling large strain solid mechanics problems. Can any one recommend some good resource on this topic? Both theoretical and numerical implementation are desired. Thanks in advance.

## A short paper on T-stress of an interfacial crack in a bi-material strip

The attached file is on T-stress of an interfacial crack in a bi-material strip. The geometry of the problem is the same with that of Suo and Hutchinson (1990, IJF). Using a conservation integral technique, a formula for T-stress is derived with two numerical factors.

## rupture of Cu films

Dear Prof. Li, i have made two figures about rupture strains of  films on elastomer according to the datas shown in your papers-- "Deformability of thin metal films on elastomer substrates" International Journal of Solids and Structures 43 (2006) 2351–2363. and "Stretchability of thin metal films on elastomer substrates" APL85(2004). According to the papers, the stiffer or thicker the elastomer substrates, the larger rupture strains, then where would be the curve with H/h =200? Whether the rupture strain is even large, according to your simulations?

## Solution of system of Differential equations

As mentioned earlier I am trying to solve for a vector {x} from

{x'}=[A(t)]{x}

where [A(t)] is known matrix of size (2X2) at the max 4x4, elements and are functions of "t".

{x} is a vector (nX1) function of 't'

{x'} is derivative of {x} with respect to 't'.

## Analytical derivation on the stress of the adhesive layer based on beam/plate therories?

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I just came across the lecture notes from Professor Nix on Mechanical Properties of Thin Films. It is very educative and helpful. I wonder if anyone could recommend some analytical derivation on the stress of the adhesive layer between two similar/dissimilar adherends (sandwiched specimen) under mechanical or thermal loading.

Many thanks ...

## Call for papers: Mahalanobis-Taguchi System Analysis

Call for papers: Mahalanobis-Taguchi System Analysis.  A special issue of the International Journal of Industrial and Systems Engineering (IJISE).

With rapid advances in technology, use of automated data collection methods is on a steep rise. Situations that call for decision-making with voluminous datasets involving several variables are being encountered in an ever-increasing number of fields. Mahalanobis-Taguchi System (MTS) analysis provides an effective decision-making methodology in such situations. It is being successfully used by engineers in companies such as Nissan, Ford, Delphi, Xerox, and Yamaha, to name but a few.  This special issue invites submission of papers that could be state-of-the-art, new contributions, technical notes, review papers, or case studies in the area of Mahalanobis-Taguchi System analysis. For more information, please see the Journal Call for Papers website.

## International Journal for Computational Vision and Biomechanics

International Journal for Computation Vision and Biomechanics - Announcement and First Call for papers

ISSN: 0973-6778

Subject: Computational Vision and Biomechanics

Frequency: 2 issues per year

Start date: First trimester of 2007

Dear Colleague,

It is a pleasure to announce the new International Journal for Computation Vision and Biomechanics (IJCV&B) and its first call for papers.