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Loading problems in simulate crack propagation with cohesive element

Submitted by Pulin Nie on
education
cohesive element

Hi all:

When I simulate a crack propagate along interface between film and substrate with cohesive element, different load-deflection curves of film were achieved when I applied load or displacement on film, respectively.  I think it should achieve same results regardless which kind of load I selected.  Please help me find what’s wrong with my simulation.

爆炸力学的发展史

Submitted by Ying Li on
education
expolsive mechanics
爆炸力学是力学的一个分支，它主要研究爆炸的发生和发展规律，以及爆炸的力学效应的利用和防护的学科。它从力学角度研究化学爆炸、核爆炸、电爆炸、粒子束爆炸(也称辐射爆炸)、高速碰撞等能量突然释放或急剧转化的过程，以及由此产生的强冲击波(又称激波)、高速流动、大变形和破坏、抛掷等效应。自然界的雷电、地震、火山爆发、陨石碰撞、星体爆发等现象也可用爆炸力学方法来研究。

drop test in ansys ls-dyna

Submitted by SUNILKUMAR on
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droptest in ansys-lsdyna

hi,

i am sunil kumar , this is my very first letter to this forum .

i am working on ansys-lsdyna drop test module , please if any one working on that module respond to me . i am dropping a aluminium block on to a rigid surface from 1.5m height , i need to get out put acceleration around (37000 m/s2) but i am getting too high as (250000 m/s2) in vertical direction at the time of impact .

Virginia Tech shootings take away two mechanicians

Submitted by Yongqiang Li on
education
Virginia Tech shooting

During the shootings occurred on the campus of Virginia Tech, the department of engineering science and mechanics lost two fine professors. Dr. Liviu Librescu was teaching solid mechanics class when the gunman initiated a two-minute massacre next door. Most of the students in his class escaped from the windows while Dr. Librescu held the door and did not survive when the gunman broke in. Another professor is Dr. Kevin Granata.

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