Computational Mechanics

  • Advanced finite element methods
    • 3-D transient solid dynamics
    • statics and quasi-statics
    • probabilistic finite elements
    • extensive pre- and post-processing
    • residual stress prediction in welding
    • high temperature viscoplastic behavior
    • residual stress and deformation prediction of composite parts during curing
  • Third party finite element programs
    • ABAQUS
    • NASTRAN
    • ANSYS
    • MARC
    • WHAMSE
    • SYSWELD
    • BEST 3D
  • Advanced boundary element methods
    • 2- and 3-D formulations

A fluid/structure finite element code, PFRAC, is used to investigate crack propagation in gas pipelines. Stress contours are shown superimposed on the deformed shape of a 56-inch-diameter pipe soon after crack initiation.

Probabilistic finite element software called NESSUS, developed by SwRI engineers, is used to compute the stress magnitudes near collapse of a space shuttle main engine component. NESSUS will be used to develop a safer and more reliable space shuttle.

Survivability of underground structures during a nuclear attack is determined in terms of failure probabilities using SwRI-developed software. A high impulse wave caused by nuclear blast at ground zero is shown interacting with an underground tunnel.

For more information on materials and structures, contact Dr. Ben H. Thacker, Mechanical Engineering Division, Southwest Research Institute, P.O. Drawer 28510, San Antonio, Texas 78228-0510, Phone (210) 522-3896, Fax (210) 522-6965.

Engineering Mechanics
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