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Dynamic Brittle Fracture as a Small Horizon Limit of Peridynamics

Submitted by Robert Lipton on

Overview: The peridynamic formulation is a
spatially nonlocal derivative free model for simulating problems of free crack
propagation.Material points interact through short-range forces and the
formulation allows for discontinuous deformations. Here the short-range forces
are initially elastic and soften beyond a critical relative displacement. We
upscale this peridynamic model to find the macroscopic (a.k.a. small horizon)
limit. It is shown that the limiting macroscopic evolution has bounded energy
given by the bulk and surface energies of brittle fracture mechanics. The
macroscopic evolution corresponds to the simultaneous evolution
of the fracture surface and linear elastic displacement away from the crack

Curvature effect on nitinol aortic stent

Submitted by ankur2626 on

high i am a student doing a project on curvature effect on thoracic stent. I want to curve the nitinol stent in abaqus. I am using RSURFU and doing static analysis. But am not able to curve it. Also when using implicit dynamic analysis with quasi static apllication my KE is high and comparable to IE. So can any body help me. Crimping and expansion is not a problem.

 

Liping Liu is the recepient of the 2013 Eshelby Mechanics Award for Young Faculty

Submitted by Pradeep Sharma on

It gives me great pleasure to announce the outcome of the 2013 competition for the Eshelby Mechanics Award for Young Faculty. This award is given annually to rapidly emerging junior faculty who exemplify the creative use and development of mechanics. The intent of the award is to promote the field of mechanics, especially among young researchers. The selection committee consisted of: K. Ravi-chandar (UT Austin), Huajian Gao (Brown University), Kaushik Bhattacharya (Caltech), Roger Fosdick (Minnesota University), and Yonggang Huang (Northwestern University).

J integrale evalution on Abaqus

Submitted by Brick chaouche Amine on

Good mourning, i am using Abaqus software to inverstigate a crack propagation problem using Abaqus, in this regards i have created a seam crack iner the geometrie which is a plate  under a plane stress condition, my problem is how to mesh around the crack tip in order to have a regular mesh around the crack tip so i can evaluate J integral for multiple contours, the Abaqus documentation mention the swept meshing technique but i coudn't find something about a 2D problem since the sweapt meshing technique nead to mesh a section and swept it over the rest of the body, and in 2d problem we

problem installing visuo studio and intel compiler fortran.

Submitted by apin87@hotmail.com on

Hi, im using abaqus 6.9 with the computer Wnidow 7 -64bit operating system.
 
May i know abaqus 6.9 must using visual studio 2005 or we can using other than 2008?
and may i know we writting our subroutine in the fortran 90 ? and we still need to install intel compiler fortran?
 
thanks for your help.

1st invitation to VAL 2015 conference discussing effects of variable amplitude loading

Submitted by pragtic on

Dear iMechanicians,

Let me invite you the 3rd International Conference on Material and Component Performance under Variable Amplitude Loading (VAL 2015) taking place in Prague, Czech Republic in March 23-26, 2015. See the details on its website http://www.val-conf.org.

The conference will discuss among others these primary questions: