Controversy: Dynamic Peierls-Nabarro equations
In 2010, Yves-Patrick Pellegrini published a paper in Physical Review B called
Dynamic Peierls-Nabarro equations for elastically isotropic crystals. with the abstract
Damage Detection of Bridge Using Vibration Analysis and Finite Element Method
Dear All,
I am currently working on a small academic project of Damage Detection of Bridge Structure using Vibration Frequency and Modes analysis and Finite Element method.
My questions are:
1) Is there any systematic approach to follow this problem?
2) How should I start making its mathematical model? I am considering a truss bridge. Is it appropriate to consider linear elastic deformation of simply supported beam at first point?
3) Is there any standard reference which can help me to construct its mathematical model?
George Bugliarello died on 18 February 2011
George Bugliarello, president emeritus and former chancellor of Polytechnic Institute of New York University (NYU-Poly), an acknowledged visionary who brought about significant changes in engineering and education, died after a short illness on February 18. He was trained in hydrodynamics and civil engineering. His lifelong investigation was how natural, mechanical, information and energy systems affect society.
Stress intensity factor
hi all,
I am facing problem in understanding stress intensity factor. How exactly i can analyse crack propagation through SIF. In books it is given that SIF characterises the crack. But in numbers how can i know whether this crack will propagate for this value of SIF. According to westergaard equation crack tip stresses will go to infinity if θ and r tends to zero for any value of crack length. Please somebody help regarding this. If iam technically wrong please correct me.
Thank you
Kirthan.L.J
Job Positions at Engineering Mechanics Department, Institute of High Performance Computing, Singapore
As a proud member of theAgency for Science, Technology and Research (A*STAR), the Instituteof High Performance Computing (IHPC) was established in April 1998 to provide leadership in high performance computing as a strategic resource for scientific inquiry and industry development. Our mission is to advance science and technology, and develop leading edge applications through high performance computing and computational science.
The James Clerk Maxwell Young Writers Prize
Congratulations to Julian Rimoli (who's one of the moderators of iMechanica) for winning the 2010 James Clerk Maxwell Young Writers Prize!
Two Faculty Positions in Structural Engineering, Mechanics and Materials at the Georgia Institute of Technology
The School of Civil and Environmental Engineering invites applications for two tenure-track faculty positions in structural engineering/mechanics/materials (SEMM). Candidates at all ranks are sought with expertise in one or more of the following areas: (1) computational/solid mechanics; (2) infrastructure materials. The expected starting date is August, 2011.