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Perspective article on the X-FEM in computational fracture

Submitted by N. Sukumar on

Abstract: In this paper, we provide a retrospective examination of the developments and applications of the extended finite element method (X-FEM) in computational fracture mechanics. Our main attention is placed on the modeling of cracks (strong discontinuities) for quasistatic crack growth simulations in isotropic linear elastic continua.

Thermo-coupled Surface Cauchy-Born Theory

Submitted by MNasr on

Obtaining high accuracy with low computation requirements is a challenge in the modeling of the thermomechanical response of nanostructures. Although the field is important to capture size dependency at finite temperatures, it is mostly quasiharmonic and Molecular Dynamics (MD) simulations that lead to reliable results. To formulate an engineering approach to this problem, Thermo-coupled Surface Cauchy-Born method was developed combining Surface Cauchy-Born and Engineering Molecular Mechanics.

Deformation Gradient from a deformed mesh - 4 node solid elements

Submitted by pateljay26 on
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Hello,

I have a 2D mesh that has 4 node solid elements. I am aware that to determine the components of deformation gradient tensor F, I will require displacement functions, u(x,y) and v(x,y) in a current configuration. Taking a partial derivative with respect to x and y respectively yields components of def. gradient tensor F. 

Predictive Multiscale Materials Modelling

Submitted by karelmatous on

Workshop on Predictive Multiscale Materials Modelling was held at the Isaac Newton Institute for Mathematical Sciences, University of Cambridge UK. Slides and videos of all presentations can be seen at the workshop website

Professor Christensen has published an interesting article in JAM

Submitted by Yonggang Huang on

Professor Richard Christensen, Stanford University, has published an interesting article "Evaluation of Ductile/Brittle Failure Theory and Derivation of the Ductile/Brittle Transition Temperature" in the February, 2016, issue of Journal of Applied Mechanics.  This paper provides a very unique  approach to ductile/brittle transition.  The pdf file of the paper is attached.

 

Yong Zhu is the new Editor of the iMechanica Journal Club

Submitted by Teng Li on

Yong Zhu, of North Carolina State University, will become the new Editor of the iMechanica Journal Club starting from Jan. 1, 2016. His research addresses basic and applied problems at the intersection of solid mechanics and micro/nano-technology, which has been recognized by a list of awards, including the 2015 ASME Sia Nemat-Nasser Early Career Award.