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Investigating Stochastic Sensitivity to Solve Multidisciplinary Shape Optimization in Stamping, INRIA Sophia Antipolis, France

Submitted by ahabbal on
job

Description

Stamping simulation, as are all the highly nonlinear mechanical
models, is ravenous in computational resources. Thus, when performing
shape or parameter optimization of a single or /a fortiori/ multiple
criteria related to the stamping process, one has to save as many as
possible computer evaluations of the solution fields, which prohibits a
naive use of classical zero-order algorithms beit deterministic or
probabilistic.

Efficient Computational Tools to Solve Concurrent Optimization of Surfaces in Stamping at INRIA Sophia Antipolis, France.

Submitted by ahabbal on
job

Description

The limited availability of mineral resources has led to the need for High Performance Material (Steel, Aluminium, Alloys,…).

These advanced materials are used to design lighter and stronger
structures, which result in a lower consumption of energy if one thinks
of the correlation between the weight and fuel consumption e.g. in the
automotive and aerospace industry.

Summer School on Advances in Finite Element Methods

Submitted by mac on
conference
finite element methods
mathematical modeling
adaptivity
Discontinuous Galerkin FEM
The Summer School on Advances in Finite Element Methods will be held in Cape Town, South Africa, from 14-18 Jan 2013.

The website www.fesummerschool.co.za contains details such as registration, accommodation, lecturers and the schedule. 

The objective of this summer school is first, to provide the necessary background in the mathematics of finite elements, and second, to build on this background by addressing the topics of adaptivity and discontinuous Galerkin methods.



Topic 11: Why is the FAR and SIR measures of fatality considered poor measures from the organisation perpective.

Submitted by oseghale lucas… on
industry
Safety Engineering and Risk Management Debate 2012

Discuss why the FAR and SIR measures of fatality rate in an organization perpective is considered a poor measure of assessment of fataliy rates within the organisation.

Postdoc positions in Computational Chemistry/Computational Materials

Submitted by pkroll on
job
simulations
modeling
density functional theory
oxidation
Phase Transitions
empirical potentials
boron nitride

Two postdoctoral positions in Computational Chemistry/Materials are to be filled in the group of Peter Kroll in the Department of Chemistry and Biochemistry at UT Arlington, Arlington, TX. The position is available immedeately and should be filled until January 2013. 

Efficient preconditioner for Augmented Lagrangian

Submitted by tlaverne on
Forums
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Hi folks !

I have a question which is more mathematical than mechanical. However since it is to solve mechanical problem, one of you may have an answer !

I want to solve a non-linear problem with non-linear equality constrains and I'm using a augmented Lagrangian with a penalty regularization term that, as well known, spoils the condition number of my linearized systems (at each Newton iteration I mean). The bigger the penalty term, the worse the condition number is. Would someone know an efficient way to get rid of this bad conditioning in that specific case ?

Help: calculate elasticity tensor for hyperelastic material with plane stress configuration

Submitted by Haofei Liu on
Forums
Ask iMechanica

Dear all,

I am confused with the calculation of elasticity tensor of hyperelastic material in plane stress configuration. Your helps are very much appreciated. Below is my question:

Incompressible strain energy function is expressed as, saying, U=***+p(J-1).

Therefore, the second piola-kirchhoff stress is: S=***+pC^-1 (the Lagrange muliplier p is treated as an arbitrary constant here, right?).

Using the plane stress condition, S<33>=0 so that p is updated as a function of deformation.

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