Peridynamics: A Case Study for the Role of an Applied Mathematician at a National Lab

Friday, February 6, 2009 - 1:25pm - 2:25pm
Vincent 570
Richard Lehoucq (Sandia National Laboratories)
The purpose of my talk is to introduce peridynamics as a proxy for discussing the role of an applied mathematician at a national lab. The peridynamic balance of linear momentum replaces the local source term of the classical continuum balance law with a nonlocal term. The source term represents internal force interaction, and in peridynamics is represented by an integral operator that sums internal forces separated by a finite distance. This integral operator is not a function of the deformation gradient, allowing for a more general notion of deformation than in the classical theory that is well aligned with the kinematic assumptions of molecular dynamics. I review some of the mathematical results achieved during the last two years.