research
Is Thermoelectric Conversion Efficiency of a Composite Bounded by its Constituents?
We analyze the conversion efficiency of thermoelectric composites, and conclude that thermoelectric figure of merit ZT as we know it is ill-defined for composites, and is irrelevant for their conversion efficiency. In addition, we prove that thermoelectric conversion efficiency of a composite is not bounded by its constituents, and can be higher than all its constituents in the absence of size and interface effects, in contrast to previous claim.
Symmetry-Adapted Phonon Analysis of Nanotubes
This is the draft of our recent paper on the phonon analysis of nanotubes which is accpeted for publication by JMPS. The title and abstract are:
Title: Symmetry-Adapted Phonon Analysis of Nanotubes
Amin Aghaei, Kaushik Dayal (Civil and Environmental Engineering, Carnegie Mellon University)
Ryan Elliott (Aerospace Engineering and Mechanics, University of Minnesota)
Abstract:
A Post-Doctoral position at the Hebrew University- mechanics of landslide triggering.
A postdoctoral research position is available at the Earth Sciences Institute, at the Hebrew University, Jerusalem, Israel, focusing on understanding basic processes of submarine landslide triggering, with applications to the Eastern Mediterranean Sea, offshore Israel. The work will involve numerical and/or physical modeling, analyzing the mechanisms of submarine slope-failure. Applicants should send their CV and intention letter including names of 3 referees, directly to the PIs: Prof.
Highly stretchable and tough hydrogels
- Jeong-Yun Sun, Xuanhe Zhao, Widusha R.K. Illeperuma, Kyu Hwan Oh, David J. Mooney, Joost J. Vlassak, Zhigang Suo. Highly stretchable and tough hydrogels. Nature 489, 133-136 (2012).
- Watch movie on stretchy and tough gels
- Suplementary Information and Movies
- Nature News and Views, A hard concept in soft matter, by Kenneth R. Shull.
Tribology for Sustainability: Economic, Environmental, and Quality of Life - Special Issue freely available online!
Tribology International Special Issue of the 37th Leeds-Lyon Symposium on Tribology: Tribology for Sustainability: Economic, Environmental, and Quality of Life.
For more information or to access this Special Issue, go to: http://www.journals.elsevier.com/tribology-international/
LSDYNA UMAT- history variable choice
Hi,
I'm presently working on implementing anisotropic yield criteria in LSDYNA as UMAT.
I understand from the LSDYNA documents that effective plastic strain is a default history variable. So when we code, can we omit the update of effective plastic strain as a history variable? If so, where is it stored and how is it retrieved during post-processing ?