Advanced Numerical Simulation of Failure in Solids Under Blast and Ballistic Loading: A Review
Analyses of structural response to blast and projectile penetration require advanced computational modeling. The problems are geometrically and materially nonlinear. Accuracy of the solutions is sensitive to several numerical algorithms: robust contact, air blast/structure coupling, nonlinear error estimation, adaptive mesh, and cohesive element. Description of the damage and failure processes demand high mesh resolution and often extremely small time steps. If the localization phenomenon leads to large-scale plastic yielding and large deformations, the accuracy of the solution tends to depend on our ability to capture the time and space resolved extreme gradients of stress, strain, and other internal state variables. This chapter discusses the computational requirements on the accurate modeling of structure, armor, and projectile responses as well as the blast phenomenon.
KeywordsBlast Dynamic fracture Shock wave propagation Hydrocodes Projectile penetration Diagnostics penetration experiments Particles methods Adaptive mesh Contact
The author acknowledge Dr. Gordon Johnson and Dr. Charles Anderson, Jr., of Southwest Research Institute for providing ballistic simulation results and references. Dr. Paul Mlakar of ERDC and for his helpful discussions and suggestions on the blast loading applications. The technical support and encouragement of Dr. Yapa Rajapakse of Office of Naval Research and Prof. Arun Shukla, University of Rhode Island, RI are also gratefully acknowledged.
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