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Effect of material nonlinearity on spatial buckling of nanorods and nanotubes

Submitted by Ajeet Kumar on

You may be interested in reading our following article: http://link.springer.com/article/10.1007/s10659-016-9586-1. We show the importance of incorporating material nonlinearity for accurate simulation of nanorods and nanotubes. The linear material laws are shown to give completely erroneous results. The nonlinear material laws for nanorods were obtained using the recently proposed "Helical Cauchy-Born rule". We also discuss how surface stress affects buckling in such nanostructures.

Assistant or Associate Professor position at the Faculty of Aerospace Engineering, TU Delft, The Netherlands

Submitted by Sergio Turteltaub on

A new tenure-track faculty position is available in the group of Aerospace Structures and Computational Mechanics (ASCM) at the faculty of Aerospace Engineering of Delft University of Technology in the Netherlands.

How to call UEXTERNALDB subroutine

Submitted by Fausto Tucci on

Hi, I'm new user of ABAQUS. I'm trying to develop a model that involve one further output variable (the degree of cure of a polymer). I thought to use the subroutine UEXTERNALDB to write and read from an external file the array containing the values of this output variable in each element. But I couldn’t find out how to call this subroutine in the .inp file. Does anyone have any suggestion for my problem?

Thank you

Active stretching shock wave as reactive engine

Submitted by Leonid G. Phil… on

The drivers for move of the rockets are designed in form that or the other version of the Laval nozzle.The reactive force of the traction which is created by such driver   can essentially be increased if in the outer section of nozzle is placed an active shock wave of stretching (depression): then the reactive force of the traction becomes

DEFORM 3D

Submitted by minamalek on

<p>How should I describe a boundary condition (inter-object relation) between two plastic workpieces which one of them is inside the other one??</p>
<p>The whole work pieces are being cold forming by DEFORM 3D V6.1</p>

Ph.D. position in computational solid mechanics

Submitted by A.Tabarraei on

A PhD position is available in the Department of Mechanical Engineering and Engineering Science at the University of North Carolina at Charlotte. The research project is on the multiscale modeling of the stress corrosion cracking. Candidates should have a strong background in continuum mechanics, finite elements and constitutive modeling. Programming experience in Fortran or C++ is required for this position. The starting date for this position is January 2017.