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Two Doctoral Research Positions Available in the Cornell Fracture Group

Submitted by Anthony R. Ingraffea on

The Cornell Fracture Group (CFG) has 2 new PhD student positions open on NASA-sponsored projects.

NASA Constellation University Institutes Project:  Develop a hierarchical, multi-scale simulator for damage tolerance and durability of advanced composite structures.

NASA Integrated Resilient Aircraft Control Project:  Develop a simulation capability to determine residual strength of damaged aircraft structure.

Cell mechanics workshop

Submitted by Taher A Saif on

The Center for Cellular Mechanics at U of Illinois has recently hosted a week long summer workshop on Cell Mechano Sensitivity (July 30-Aug 3, 2007. The workshop had lectures in the morning an hands on-labs in the aternoons. All the lectures are on the web (with slides and video). They include a large collection of references. The web also has the laboratory protocols for cell culture, cell fixing and staining, single molecule detection, florescence microscopy, and much more. Visit the website:

www.ccm.uiuc.edu  

Special Journal Issue on Bridging of Material Length Scales

Submitted by Rashid K. Abu Al-Rub on

Dear Esteemed Researcher,

 

It is my pleasure to invite you to submit your recent work as a contribution to the special issue on “Bridging of Material Length Scales” for the journal “International Journal of Materials and Structural Integrity” [http://www.inderscience.com/browse/index.php?journalID=162].

 

Resonance frequency of cantilever

Submitted by Somashekara Bhat on

Resonance frequency of a cantilever beam is given by

f=(kn/2pi)*sqrt(EI/mL4)

where, kn=3.52 for cantilever, E is Young's Modulus, I is moment of Inertia, m is mass, L is beam length.

The equation is available in Raymond J. Roark and Warren C. Young, “Formulas for Stress and Strain”, McGraw-Hill, Kogakusha, 5th Edition, (1976).

Can any one help me in deriving this. Or any books or websites which deal with this equation.

Large elastic strain - limits of Green strain

Submitted by Peter Hartley on

I am looking at problems of large deformation and large elastic strain in biological materials, using an analytical model that determines the current deformed state in a single step from the original undeformed state. The approach is to propose a strain energy function to allow the calculation of Piola-Kirchhoff 2 stresses which may then be converted to true Cauchy stresses via the usual mapping. Since I initially calculate PK2 stresses, the strain energy function must be a function of Green strain.