Blog posts

Short Course on Mechanics of Foams

Submitted by Patrick Onck on Thu, 01/15/2015 - 11:41

A short course on the “Mechanics of Liquid and Solid Foams” will be offered at CISM, the International Centre for Mechanical Sciences in Udine, Italy, 13-17 July 2015 (see brochure attached).

The course will focus on relationships between the cellular microstructure and nonlinear mechanical behavior of liquid and solid foams, and foam-like biological and synthetic materials. Theoretical models, experimental methods, and numerical simulations will be presented. The course is aimed at PhD students, postdocs, and researchers in academia and industry.

Recoverable plasticity in penta-twinned metallic nanowires governed by dislocation nucleation and retraction

Submitted by yinsheng008 on Wed, 01/14/2015 - 19:41

Abstract: There has been relatively little study on time-dependent mechanical properties of nanowires, in spite of their importance for the design, fabrication and operation of nanoscale devices.

Case Study: Modelling Ultrasonic Array Response of Real Cracks

Submitted by Simpleware on Wed, 01/14/2015 - 15:23

Stress corrosion cracks can be a serious problem in many engineering industries, and especially so for critical parts. While an ultrasonic transducer can be used for the non-destructive evaluation of cracks with simple shapes, complex branching cracks, such as stress corrosion cracks, require ultrasonic arrays that consist of multiple transducers and are able to inspect at multiple angles.

Positions for PhD students and postdoctoral researchers

Submitted by moorekwesi on Wed, 01/14/2015 - 11:12

Isogeometric Analysis

Positions for PhD students and postdoctoral researchers
at the Institute of Applied Geometry, JKU, Linz, Austria

The Institute of Applied Geometry at Johannes Kepler University
(www.ag.jku.at) has vacant positions for PhD students and
postdoctoral researchers. Applicants should possess a background
in geometric modeling, computational geometry or numerical analysis.

Quantitative modeling of the equilibration of two-phase solid-liquid Fe by atomistic simulations on diffusive time scales

Submitted by mohsenzaeem on Tue, 01/13/2015 - 21:48

research

Molecular Dynamics (MD); Phase Field Crystal

Molecular dynamics (MD) simulations based on the modified-embedded atom method (MEAM) and a phase-field crystal (PFC) model are utilized to quantitatively investigate the solid-liquid properties of Fe. A set of second nearest-neighbor MEAM parameters for high-temperature applications are developed for Fe, and the solid-liquid coexisting approach is utilized in MD simulations to accurately calculate the melting point, expansion in melting, latent heat, and solid-liquid interface free energy, and surface anisotropy.

Postdoctoral Appointee – Computational Mechanics - Sandia National Laboratories – Livermore, CA

Submitted by Alejandro Mota on Tue, 01/13/2015 - 21:42

About Sandia

Sandia National Laboratories is the nation's premier science and engineering lab for national security and technology innovation. We are a world-class team of scientists, engineers, technologists, post docs, and visiting researchers all focused on cutting-edge technology, ranging from homeland defense, global security, biotechnology, and environmental preservation to energy and combustion research, computer security, and nuclear defense.

To learn more, visit http://www.sandia.gov.

Friction modeling LAMMPS

Submitted by Dincoz on Tue, 01/13/2015 - 20:45

Hi All,

Is there any one working on modelling of friction using LAMMPS to discuss an issues?

Best

Add XFEM crack to an already deformed model

Submitted by thestock on Tue, 01/13/2015 - 20:39

research

I hope this can be done and I want to say thank you in advance for any feedback.

I have already completed a simulation of a plate with a hole and pulling a mandrel through the hole to expand it and create a plastically deformed hole.

Now, I would like to take this plastically deformed hole, add an XFEM crack and vertically pull to simulate a tension test.

Can this be done?

Issues:
Tried Predefined Field - Stress: