The 23nd Annual Melosh Competition for the Best Student Paper on Finite Element Analysis will be held at Duke University on April 29, 2011. The competition has become one of the premier graduate student events in the broad area of mechanics.
Hello,
I am trying to solve the global stiffness matrix for a component assumed to be a series of 3-D beam elements.
Some of the diagonal elements of the transformation matrix are zeros and i eventually end up in finding the inverse of a matrix with some zeros in its diagonal which is not possible.
Can anyone let me know if the transformation matrix can have zeros along its diagonal?
Thank you.
Dear Colleagues,
We are pleased to inform you that at the conference Inverse Problems, Design and Optimization Symposium (IPDO) that was held in João Pessoa, Brazil from 25-27 of August, 2010 the results of application of IOSO optimization software were presented for a new complex class of optimization problems: Design of Molecules.
Dear friends
Can you help me to find the relationship between true (Cauchy) stress and Almansi strain (constitutive equation)?
thanks
It is essential to know the amount of springback for a given forming process, so that the process or the design of the tool can be modified to obtain the desired product shape. This requires a comprehensive understanding of loading and unloading processes, and determination of elastic constants with finite plastic deformation which, in turn, require precise determination of subsequent yield surfaces.
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.
Materials such as sedimentary rocks, pharmaceutical tablets, plastic bonded explosives, biscuits, concretes, nacre, solid propellants, seashells and asphalts can be treated as particulate composites that consist of particles of high volume fraction, matrixes of thin layer and interfaces of high specific surface area. Mechanical behaviour of highly packed particulate composites is the theme of this issue of Journal Club forum.
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.
Dear all,
I'm a researcher in the area of applied mechanics. Currently, I'm surveying articles on the constitutive and numerical modeling of fiber reinforced polymer composite. In particular, the fiber is a glass woven fabric. The matrix is the epoxy (thermoset which shrinkages when curing is completed). I want to know woks relevant to this kind of materials. I have found some "compressible hyperelastic model" which is for the epoxy only. Any comments or suggestions will be welcomed!
Best regards,
Sangyul Ha
The published version may be accessed at
https://www.researchgate.net/publication/251448926_Ductile_Fracture_by_…
Since then, two other reviews were co-authored by me:
For Acta Materialia:
https://www.researchgate.net/publication/289140144_Failure_of_Metals_I_…
And for IJF @ 50
https://www.researchgate.net/publication/305694679_Ductile_failure_mode…
