Blog posts

Post doctoral position available--nanophotonics

Submitted by Anonymous (not verified) on Mon, 09/24/2012 - 11:35

At the nanobiophysics laboratory we are looking for a post doc to participate on an experimental work regarding the tuning of fluorescence in nanoparticles under the effect of pressure. We believe that it is the strain rather the pressure that is causing the shift in the emission. We are also investigating this effect using numerical models. While we are looking for an experimentalist urgently we will be looking for a theoretician/numerical guy in a year. All welcome if you have the right attitude and motivation.

The Introduction of Shear Modification to Gurson Model

Submitted by Liang Xue on Mon, 09/24/2012 - 03:41

research

The Introduction of Shear Modification to Gurson Model

I have been asked questions about how the shear modification was introduced to the Gurson model. I was also asked to compare my modification (see Xue L., Constitutive modeling of void shearing effect in ductile fracture of porous materials, Engineering Fracture Mechanics, 2008, 75(11):3343-3366) to John Hutchinson's modification (Nahshon, K., Hutchinson, J.W., Modification of the Gurson model for shear failure. European Journal of Mechanics A/Solids, 2008, 27:1-17).

How to model prestressing force in ABAQUS/CAE???

Submitted by pramodh4156 on Sun, 09/23/2012 - 19:31

research

HI,

Am trying to model prestressed box girder bridge for high speed railway analysis.Am not getting how to model prestressing force using ABAQUS/CAE.I have seen that it's not possible with CAE. Please say me an alternative way to model prestressing force.

Modelling large deformations

Submitted by deepakshyam on Sat, 09/22/2012 - 21:21

Hi guys,

I am tring to model a thin strip of a material(E= 2*e6 MPA and poisson's ratio=0.5) into mobius strip. I should do this by applying Boundary conditions(rotation) or loads. When I tried this simulation, it kept getting aborted when I gave rotation(with respect to the axis parallel to the length) more than 3 radians. I tried refining the mesh but it di not help. Can any one suggest me how to go forward with this simulation or suggest me any other way of achieving this.

note: i used quad shell elements

Deepak

Faculty Positions in Solid Mechanics at Brown University

Submitted by pguduru on Sat, 09/22/2012 - 01:45

job

The School of Engineering at Brown University is seeking to fill positions in Solid Mechanics at any academic level to start in July 2013. Applications should be received by December 31, 2012 to receive full consideration. Women and candidates who are members of minority groups are especially encouraged to apply. Brown University is an Equal Opportunity Affirmative Action employer. Positions are open at all levels. For further information and instructions on how to apply, view the attachment below or visit: brown.edu/academics/engineering/facultysearch

about the gradient of dislocation core

Submitted by wuwenwang on Fri, 09/21/2012 - 22:00

opinion

dislocation core

According to the eigenstrain theory of micromechanics, described in the book by Toshio Mura (micromechanics of defects in solid, 1982) from page 15-20.

He provided the formulas for the eigenstrain at the core of screw and edge dislocation, but I can not understand completely.

Anybody can provide some reference articles about the gradient value du(i)/dx(j) at the core of screw and edge dislocations respectively?

Computational Study of Cortical Bone Screw Pullout using the Extended Finite Element Method (XFEM) - 2012

Submitted by SIMULIA on Fri, 09/21/2012 - 20:34

software

finite element analysis

In this study, using a UDMGINI subroutine, stress components relative to a predefined osteon orientation were computed and an anisotropic damage criterion was used to determine damage initiation and to predict crack propagation.

Evaluate Medical Device Design Robustness by Combining Statistical and Probabilistic Tools with Finite Element Analysis - 2012

Submitted by SIMULIA on Fri, 09/21/2012 - 20:32

finite element analysis

In this study, FEA using Abaqus is combined with statistical and probabilistic analysis using Isight to demonstrate how these techniques work together to evaluate the robustness of medical device designs.

Thermal Expansion & Helical Buckling of Pipe-in-Pipe Flowline Systems -2012

Submitted by SIMULIA on Fri, 09/21/2012 - 20:30

finite element analysis

This paper presents helical buckling analyses are performed primarily to determine the critical effective axial load at which the inner pipe of a pipe-in-pipe (PiP) system snaps into a sinusoidal or helical buckling deformation mode.

Parametric Optimization of an Exhaust Manifold Using Isight, STAR-CCM+and CATIA V5 - 2012

Submitted by SIMULIA on Fri, 09/21/2012 - 20:27

finite element analysis

The work presented demonstrates how Isight may be used to drive STAR-CCM+ and CATIA V5 for parametric optimization. A key requirement from the OEM was to remove time-consuming manual iterations from the design process and this example case was setup to demonstrate the automatic optimization process using their existing design and analysis tools.

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