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Help with curved specimen and mechanical loading

Submitted by tom_biomech on
research
Background:

Rib fractures in infants are highly suggestive of child abuse. I am performing mechanical testing and finite element analysis on pig ribs with the aim of characterising the behaviour of ribs under anterior-posterior (from end to end rather from the side) loading.



Help needed:


Large electric field induced strains in ferroelectric islands

Submitted by jzz108 on
research

An effective mechanism that generates large recoverable electric field induced strains in ferroelectric islands is studied by phase-field modeling. The large strains originate from the reversible 90° domain switching between a1 (a2) domains and c domains, driven by an applied electric field and an internal stress field. The electric field induced strains could be effectively controlled by the magnitude of island-substrate misfit and the aspect ratio of islands.

The paper could be download in the following link:

Multiscale method with model reduction

Submitted by Julien Yvonnet on
research
model reduction
multiscale methods
propper orthogonal decomposition

Model reduction based on Propper Orthogonal decomposition is widely used in Computational mechanics to reduce the number of degrees of freedom in systems. In the attached papers, we introduced a POD-based model reduction in a multiscale framework to significantly reduce the computations.

PhD at the University of Wisconsin-Milwaukee

Submitted by Dr. Michael No… on
job
PhD studies in tribology / contact mechanics

I am looking for a PhD student (RA) in Mechanical
Engineering to start in Sept. 2010. The topic is in modeling in tribology
(biomimetic surfaces, contact mechanics, adhesion). The initial support (RA) can be
provided via INSIC TAPE grant and other sources. Interested persons should send
their resume to me at nosonovs AT uwm.edu. The admission criteria for the PhD
degree can be found at http://www4.uwm.edu/ceas/current_students/graduate_students/index.cfm

A very basic doubt in Strength Of Materials

Submitted by ROHAN_SK on
Forums
Ask iMechanica

Hi Members,

                   This may seem a very basic or even stupid question to you all , but it still leaves me with a doubt regarding the concept behind the WHY and HOW of this. So however trivial this may seem Please bear wiith it and Help me Clearify my concept and getting the right idea.

Postdoctoral/PhD position

Submitted by Eran Bouchbinder on
job

A postdoctoral/PhD position in various non-equilibrium problems in solid mechanics is available at the Weizmann Institute of Science. Candidates should have a strong background in physics and/or theoretical mechanics, as well as experience with analytical and computational methods for solving partial differential equations. More details can be found in http://www.weizmann.ac.il/chemphys/bouchbinder/ For information about specific research projects, please send CV, a publications list and a statement of research interests to Dr.

Finite-Temperature Atomic Structure of 180^o Ferroelectric Domain Walls in PbTiO_3

Submitted by arash_yavari on
research
ferroelectrics
domain walls
Lattice Dynamics

In this letter we obtain the finite-temperature structure

of 180^o domain walls in PbTiO_3 using a quasi-harmonic

lattice dynamics approach. We obtain the temperature dependence of

the atomic structure of domain walls from 0 K up to room

temperature. We also show that both Pb-centered and Ti-centered

180^o domain walls are thicker at room temperature; domain

wall thickness at T=300 K is about three times larger than that of

T=0 K. Our calculations show that Ti-centered domain walls have a

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