Blog posts

I have some problems with my matlab code in a 9 node shell
element each node has 5 DOFs. I found that stiffness matrix for each
element is symmetric, but after transformation to global coordinate
system, the transformed stiffness matrices and the resulted global
stiffness matrix of entire shell is nonsymmetric, where order of
transpose([k]) -[k] is approximately E-18.

Mass matrix also has
been antisymmetric after transformation and so I can't solve
characteristic equation to find eigenvalues needed for dynamic analysis.

Dear all,

Herewith I want to announc the release of CONTACT version 10.2.

The main changes with respect to earlier versions of the program are as follows:

Hi all,

There is a lot of homogenization theories based on penetrable model or some other name like 'overlapping', 'randomly imbedded model' to analyze random microstructure. In reality, the fibers or inclusions can not be penetrated into each other, so why they use this assumption anyway?

 Thanks for your opinion.

National Research Council ranks the doctoral programs of universities in the States every ten years.  The new ranking just came out.  Here are the results for mechanicsl engineering and civil engineering.

Mechanical Engineering:

3. U. Michgan, Princeton

I feel honoured to share this news that, Dr. Vikram deshpande of cambridge University engineering department is appointed as Professor, effective October 1. He is quite a inspiration to people like me who work in solid mechanics.His contribution to this area is immense and i really feel happy for his acheivements and many more to come.

My heartiest congragulations to him

Dear all,

  I need suggestions regarding the transverse/out of plane material properties like E3, G13, G23 for woven composites. While modeling(and simulation) the woven composite in LS-Dyna where a shear load is applied over the surface of the laminate to study the damping behaviour of the material, i need to give the material properties (especially G13 or G23 plays a major role)  which is not precisely available in the literature.