crack propagation
Postdoc position — Modeling fragmentation in brittle materials
Hopkins Extreme Materials Institute (HEMI; hemi.jhu.edu) of The Johns Hopkins University is seeking a Postdoctoral Fellow to work on modeling fragmentation in brittle materials under extreme loading conditions. The potential candidate should have a Ph.D., with some background in fracture mechanics and experience working with the finite element or some other numerical method.
Modelling fracture of graphene using Griffith’s criterion and quantized fracture mechanics
In armchair graphene sheets, crack propagates perpendicular to the applied strain, whereas crack propagation in zigzag sheets occurs at an angle to the straining direction. This occurs due to different bond structure along armchair and zigzag directions as shown in Fig. 1. Videos 1 and 2 show the fracture of armchair and zigzag sheets, respectively.
Fig. 1: Armchair and zigzag directions of graohene
criterion to stop crack analysis in xfem
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Dear all,
my problem is dealing with a fatigue crack propagation analysis using XFEM (linear elastic case) with a prescribed initial imperfection in the modeled solid. What is the criterion to exit from such a kind of analysis?
Thank you in acvance!
Crack Propagation by Cohesive Element
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Hi everyone,
I've been working on crack propagation problem by cohesive elements in Abaqus.
I have a sandwich struture where adhesive bonds two steels together. And I've attached part of my input file in the following.
I can have the stress and strain distribution, but I really expect the crack will propagate in the midplane of the adhesives. I don't know whether I have to preset a line in the middle of adhesive as existing crac, or I can set some crack interaction to get the crack growth result.
Open Position in Computation Solid Mechanics
Position: Computational Solid Mechanics Research Engineer
Company: Global Engineering Research and Technologies (GERT)
Location: Tucson, Arizona, USA
Full/Part time: Full Time.
Benefits: Yes.
Salary: Commensurate with Qualifications.
Remote employment: No. Must be willing to relocate to Tucson, AZ.
Cohesive Zone and Cohesive Element
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Hi all,
I had been trying to reproduce a crack propagation problem using XFEM/Cohesive Zone. The problem is a 200x200x50 notched plate which has been simulated using plane strain elements 200x200 with 50 mm thickness.
I generated the cohesive layer (zero thickness) between the plane strain elements in the notch region, as cohesive elements and cohesive material properties which will define the crack initiation location.
Viscoelastic Effects on Electromechanical Instabilities in Dielectric Elastomers
Recently accepted for publication in Soft Matter:
(http://pubs.rsc.org/en/Content/ArticleLanding/2013/SM/C2SM27375F)