CSRI Seminar: Luis Melara

Title	Simulation of Twinned-Martensite as a PDE Optimization Problem
Speaker	Luis A. Melara Mathematical Modeling Group Mathematical and Computational Sciences Division National Institute of Standards and Technology luis.melara@nist.gov
Date	June 7, 2004
Time	10-11am (PT) 11am-noon (MT)
Location	921/137 (CA) 980/24 (NM)
Abstract	Developing numerical methods for predicting microstructure in materials is an extremely large and important research area. Two examples of material microstructures are Austenite and Martensite. Austenite is a microscopic phase with simple crystallographic structure while Martensite is one with a more complex structure. One important task in materials science is the development of numerical procedures which accurately predict microstructures in Martensite near an Austenite-twinned-Martensite interface. In this talk we present two numerical approaches: one that involves the solution to an equality constrained optimization problem and a second that requires the solution to an inequality constrained optimization problem. Numerical methods for solving both problems are presented together with a computationally affordable way of approximating the inequality constraint that appears in our second problem formulation. Preliminary results suggest that the minimizers of the constrained optimization problems display desirable characteristics. This is joint work with Anthony J. Kearsley
About the Speaker	Luis Melara is a National Research Council Postdoctoral Fellow at NIST.
Host	Paul Boggs, ptboggs@sandia.gov, 925-294-4630

This seminar series is hosted by the Computational Sciences and Mathematics Research Department at Sandia National Labs in Livermore, CA. This seminar is funded by the Computer Science Research Institute (CSRI). To schedule a time to meet with the speaker before or after the talk, please make arrangements with the host listed above.

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