Prediction of arterial failure
We enhanced a bi-layer fiber-matrix microstructural arterial model with softening and analyzed the artery inflation under the internal pressure. Numerical simulations lead to the following three findings. Firstly, it is found that the fiber strength dominates the strength of the media layer. Secondly, it is found that the strength of the media layer dominates the overall arterial strength and plays the crucial role in the load-bearing capacity of arteries. Thirdly, it is found that residual stresses can increase the overall arterial strength significantly. The pre-existing compression in arteries delays the onset of rupture like the pre-existing compression in the pre-stressed concrete delays the crack opening.
Fiber Composites Failure Criteria
A new failure criterion has been formulated for fiber composite materials. It is the anisotropic counterpart of a recently derived isotropic criterion. The targeted applications are for carbon fiber, polymeric matrix (or equivalent) types of materials.
Postdoctoral position in multiscale modeling at RPI
There is an opening for a postdoctoral research position in the Advanced Computational Research Laboratory at RPI, Troy, NY.to work on an ongoing project sponsored by the Office of Naval Research. The project involves the multiscale modeling of particulate composites under extreme loading conditions. This is a great opportunity to be involved in challenging
multiscale computational techniques based on meshfree methods. Encouraged to
apply are creative, self-motivated candidates with a sound background in
computational mechanics.
multiscale computational techniques based on meshfree methods. Encouraged to
apply are creative, self-motivated candidates with a sound background in
computational mechanics.
Buckling behavior of metal film/substrate structure under pure bending
Many studies on the thin film/substrate structure and its failure mechanism were reported in recent years. The direct experimental results of thin film/substrate structure by scanning electron microscopy (SEM) presents an intriguing problem:there exists a buckling failure mechanism at the lateral edge of metal film under pure bending. The qualitative theoretical analysis has been done on such buckling failure of thin film/substrate structure.
Tension Testing of Individual Collagen Fibrils
In a recent discussion it was suggested that it would be useful to perform tension tests on collagen fibrils. We have developed a MEMS-based experimental procedure that is capable of applying very large strains to individual collagen fibrils. The attached paper presents illustrative data; an upcoming paper will present much more data that illustrates the rich behavior of these fibrils during loading and unloading tests.
A University Lectureship in Solid Mechanics available in the Engineering Science Department at Oxford
Here is a Lectureship in Solid Mechanics available in the Engineering Science Department at Oxford posted by Prof.Alan Cocks.
ASME IMECE'08 Minisymposium on Recent Advances in Computational Materials Science and Multiscale Materials Modeling
The mini-symposium focuses on the link between the traditional materials modeling
and computational description of existing and new classes of materials, advanced and composite
materials and their applications. In particular, the mini-symposium is devoted to computational
characterization of material response and processing of material microstructures in the presence
of multiple temporal and spatial scales as well as multiple physical processes, and computational