Trajectory and survivability analysis of penetrators for geologic materials
- Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Engineering Science and Mechanics
This paper describes a computer program that was developed (as an analysis tool for those with little knowledge of computational solid mechanics) to approximately predict the structural response and trajectory of penetrators passing through layers of air, concrete, soil, ice, and/or rock. The program was designed to keep the required user input to an absolute minimum and to facilitate the acquisition of that input. The program automatically builds a finite element mesh for the penetrator and automatically assembles the complex and time varying load vector associated with penetration of geological materials. Penetrator trajectory and structural response are continuously displayed on the computer screen during the event. Axial forces, and lateral loads due to angle of attack and impact angle are treated. The penetrator is modeled as a series of frame-type finite elements, the number of which can be controlled by the user. Penetrators with axisymmetric and lengthwise varying cross sections can be modeled. Plastic behavior of the penetrator is treated such that work hardening and the Bauschinger effect during cyclic loading are provided for. The theoretical basis for the plastic behavior model is discussed. Program output is compared with experimental results for several test cases.
- OSTI ID:
- 428124
- Report Number(s):
- CONF-960706-; ISBN 0-7918-1772-5; TRN: IM9708%%453
- Resource Relation:
- Conference: American Society of Mechanical Engineers (ASME) pressure vessels and piping conference, Montreal (Canada), 21-26 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of Structures under extreme loading conditions -- 1996. PVP-Volume 325; Shin, Y.S. [ed.] [Naval Postgraduate School, Monterey, CA (United States)]; Zukas, J.A. [ed.] [Computational Mechanics Consultants, Inc., Baltimore, MD (United States)]; PB: 272 p.
- Country of Publication:
- United States
- Language:
- English
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