The default value of penalty stiffness scale factor in Ansys-Lsdyna  is 0.1, when one varies this value, he/she obtains different results, the question, how can one  know the right value of penalty stiffness scale factor?

I am simulating the impact of a 6mm - diameter steel solid ball with a rigid falt surface using Ansys-Lsdyna. the speed of the ball at the impact moment  is low (from 1 to 10 m/s). specificly, i am intersted in the period between  just touching and  just leaving the ground for the first impact.

Scientific Forming Technologies Corporation (SFTC) is currently looking for several self-motivated and talented individuals to further develop its Finite Element based software product DEFORM™.  Please visit www.deform.com for more details.  Ph.D in Engineering with strong background in mechanics, and/or manufacturing processes, and programming experience (FORTRAN under Windows or UNIX environment), and excellent problem solving skills are highly desirable.

Tony Evans passed away on Wednesday after a long and valiant fight against cancer.  He was Alcoa Professor of Materials, Professor of Mechanical Engineering and Director of the Center for Multifunctional Materials and Structures at the University of California at Santa Barbara.

A fully funded PhD research studentship is available at the University of Oxford, in the Solid Mechanics Group.

2010 SIMULIA Customer Conference (previously the Abaqus Users' Conference)

Call for Abstracts

Unlike other blog-posts of mine, I am not going "own" this particular thread. By that, I mean to say: I am going to only begin this thread and immediately turn it over to you completely. I am not going to watch over whether the discussion here continues to stick to its main theme or not, whether it slides into some minor side issues, whether it deserts the main theme altogether, etc., the way I usually do.



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This thread is meant to be about the following book:

 

It seems that the measurment of local stress and strain in fatigue crack tip will be difficult. some researcher use F.E analysis method,in contrary using of numerical solution. however analytical method also has investigated. what method you can imagine? i need a brain storm in this issue.

Thank you

Hadi

Dear Colleagues,

May I have your attention please? It's air time for the second episode of "Popular Science's Future of...Combat".  The show will air on The Science Channel (science.discovery.com) at 9pm ET/PT on 9/07/09. The research on biological armors by Christine Ortiz's group from MIT will be reported.

Enjoy.