University of Notre Dame College of Engineering
C-SWARM | Center for Shock Wave-processing of Advanced Reactive Materials

C-SWARM

Center for Shock Wave-processing of Advanced Reactive Materials

NEWS & EVENTS

C-SWARM SEMINAR SERIES

Room 117 I/J, Cushing Hall

Mr. Michael Skroch and Dr. Jesse Thomas from
Sandia National Laboratory

Sandia National Laboratories in Albuquerque, New Mexico, a DOE/NNSA lab, is home to a large body of research and related production code for computational mechanics including solid mechanics, structural dynamics. All these codes have objectives of running on the latest massively parallel platforms for large problems (billion-plus degree of freedom problems for structural dynamics, 100s of thousands for solid mechanics). To set context, we will provide a quick overview of Sandia Laboratories and the work being performed there across many government agencies and industry. We will then focus more upon the areas that Sierra Mechanics codes are being utilized for multiple customers, and further focus the talk about solid mechanics capabilities of Sierra.

Sierra/SolidMechanics (Sierra/SM) has a large suite of capabilities for nonlinear solid mechanics, ranging from fundamental large deformation continuum mechanics to new modeling techniques currently being researched. We will discuss some examples of recent research and development and highlight analyst use examples such as brittle failure (glass-to-metal seals), ductile failure, pervasive failure (SGT), high-speed impact problems (weapons), and blast-on-structure problems that exercise the full-spectrum of failure modeling.

One area of particular importance is damage, failure and fracture mechanics. Sierra/SM offers a suite of capabilities, in varying stages of maturity, to address such problems. Among the capabilities recently added to address mesh and geometry challenges are 3D XFEM, polyhedral elements, Peridynamics and RKPM. In addition, to address the material mechanics of damage and failure Sierra/SM is pursuing a phase field approach to introduce nonlocal damage modeling.

Another area of focus we will cover is multiscale analyses. Our goal is to incorporate microstructure effects into system analyses, to remove intermediate phenomenological models and allow more robust Uncertainty Quantification. Analysts at Sandia using Sierra/SM have looked at multiscale modeling by comparing homogenization results with direct numerical simulation. Further, Sierra/SM offers a multiscale finite element technique in the FE2 paradigm to address similar problems, with the hope of making such studies easier and more accurate in the future.

Finally, a key to enabling any of these capabilities is performance and scalability at the large core counts our analysts expect to run. Sierra/SM has benefited from recent work to take full advantage of the vectorization capabilities of modern processors, and this work is now transitioning to provide a hybrid MPI-threads parallel model to take full advantage of the next generation of supercomputers.

 

Featured People

Mr. Michael SkrochMr. Michael Skroch

Sandia National Laboratory

Dr. Jesse ThomasDr. Jesse Thomas

Sandia National Laboratory