Blog posts
Postdoctoral Fellow in Computational Mechanics
A postdoctoral fellowship is available in the Duke Computational Mechanics Laboratory, beginning in September of 2009 (with flexibility on timing). Funding for the fellowship concerns research in the simulation of large-scale fragmentation phenomena. The ideal candidate will have experience in some combination of the following areas:
mesh refinement in ansys
how to refine those hot spots (heigh stress zones) in a meshed
structure using ansys. in fact i have a large body. most of body
subject to very low (negligible or zeor stresses) except few zones with
very much high stress. first i meshed my body with coarse mesh and i
noticed those area which i expect them from experimental results now
how can i refine meshes on basis of von mises stress range.
can one do it with 'select entities'and how?
refine heigh stree zones
how to refine those hot spots (heigh stress zones) in a meshed structure using ansys. in fact i have a large body. most of body subject to very low (negligible or zeor stresses) except few zones with very much high stress. first i meshed my body with coarse mesh and i noticed those area which i expect them from experimental results now how can i refine meshes on basis of von mises stress range.
can one do it with 'select entities'and how?
Post-doctoral research opportunity at Rensselaer Polytechnic Institute
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/).
Formation of creases on the surfaces of elastomers and gels
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.
ball impact with rigid or flexible ground
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
Spectral decomposition
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