Publications

Publications

Optimization of Draw-In for an Automotive Sheet Metal Part

This paper details an optimization study for draw-in in automotive sheet metal parts, using a blend of response surface methodology (RSM) and space mapping (SM) to calibrate a finite element model with physical tests. The methodology effectively translates the equivalent draw bead restraining force from the simulation into an accurate physical draw bead geometry, demonstrating an efficient way to automate a process traditionally done manually.

New Developments in LS-OPT - Robustness Studies

Ken Craig, Willem Roux, Nielen Stander

Presents a robustness study for the optimization of shell buckling by incorporating random geometric imperfections modeled using Karhunen-Loève expansions. The process uses LS-OPT and Monte Carlo analysis to perform stochastic optimization and create a more reliable design that can handle these imperfections.

Global Structural Analysis of the Response of WTC Building 7 to Fires and Debris Impact Damage

This report analyzes the structural collapse of World Trade Center Building 7 (WTC 7) due to fire-induced damage and debris impact following the 9/11 attacks. Using finite element modeling, the study examines thermal expansion, column instability, and progressive collapse mechanisms, providing insights into high-rise structural failures and fire safety improvements.

Public Update on the Federal Building and Fire Safety Investigation of the WTC Disaster

National Institute of Standards and Technology

Here you can find public updates on the world trade center disaster

Total Knee Replacement Polyethylene Stresses During Loading in a Knee Simulator

This study used finite element models to investigate the stresses and kinematics of a total knee replacement within a knee simulator. The researchers applied flexion/extension and various loadings to the components to mimic the simulator's conditions. They found that changing the stiffness of a spring-loaded bumper system had a minimal effect on both the joint's kinematics and the stresses on the polyethylene tibial component, which is useful for predicting wear in future research.