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Changing element status in ANSYS

Submitted by Gouse on
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failure analysis

Respected sirs/madams

I am working on failure analysis of concrete. I am trying to simulate in ANSYS, I heard about element birth/death option for changing the status of element during analysis. My doubt is whether I can use this element birth/death option for analysis or this is only used as a postprocessing tool.

 I am trying is to reduce the stiffness of the elements whose maximum principal stress reaches the ultimate strength of concrete and than further apply load in the susequent load step on the finite element model whose elements are removed.

Research on meshless methods and comparison between these methods

Submitted by sadook on
research

Hello everybody,

I am doing a research on meshless methods  and I want to know about these methods, the difference between these methods and the method the most used and if it is possible, I want to get some codes of these methods.

Thank you,

Cordially, 

Sadok BLANCO,

Tunisia Polytechnic School,

Cell mechanics workshop

Submitted by Taher A Saif on
research

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
research
size effect; gradient plasticity; gradient damage; nonlocal; micro systems; nano systems; length scale

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
research
Microcantilever

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
research

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.

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