We are looking for a post-doctoral candiate in the area of computational (bio)mechanics. The project involves solving inverse problems in finite deformation elasticity with applications to the detection and diagnosis of cancerous tumors. Interested applicants should contact Prof. Oberai (http://www.rpi.edu/~oberaa/).
When a block of an elastomer is bent, the compressed surface may form a crease. This paper analyzes the critical condition for creasing by comparing the elastic energy in a creased body and that in a smooth body. This difference in energy is expressed by a scaling relation. Critical conditions for creasing are determined for elastomers subject to general loads and gels swelling under constraint. The theoretical results are compared with existing experimental observations.
I used the drop test module to simulate elastic ball impact with flat flexible surface of the same ball material properties . i meshed the whole ball with hexahedronls dyna element
Dear all,
Many numerical implementation of plasticity model uses spectral decomposition to represent the Cauchy stress, elastic strain, such that stress update algorithm is written in the principal directions. As a result, I wonder what makes it benefical to write the stress update algorithm in spectral form?
Thanks,
WaiChing Sun
Researchers at Duke University are seeking applications for NRC research associates, to work with Professors David Stepp and John Dolbow. The NRC program is unique in the sense that applicants have the opportunity to perform research on a program they design. The positions are well-paid fellowships and are nominally for two years, extendable to a third.
In my opioion, the traditional concrete model is taking the smeared cracking concept to deal with the tensile cracking and using the elastoplastic method to deal with the compressive softening.
We can find that recently the CDM based concrete model become a hot research subject.
But what are the advantages of the CDM-based?
Thank you very much!
The difference to the common model used is the f,g terms. The 3D FEM formulation has been derived and a new fortran program is written. The derivative matrix is symmetric. But the calculation result does not converge. I have tried every means to get a converging result. But it doesn't work, the residual norm always increases.
