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Proceedings Paper

Validation testing of a peridynamic impact damage model using NASA's Micro-Particle Gun
Author(s): Forrest E. Baber; Brian J. Zelinski; Ibrahim Guven; Perry Gray
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Paper Abstract

Through a collaborative effort between the Virginia Commonwealth University and Raytheon, a peridynamic model for sand impact damage has been developed1-3. Model development has focused on simulating impacts of sand particles on ZnS traveling at velocities consistent with aircraft take-off and landing speeds. The model reproduces common features of impact damage including pit and radial cracks, and, under some conditions, lateral cracks. This study focuses on a preliminary validation exercise in which simulation results from the peridynamic model are compared to a limited experimental data set generated by NASA’s recently developed micro-particle gun (MPG). The MPG facility measures the dimensions and incoming and rebound velocities of the impact particles. It also links each particle to a specific impact site and its associated damage. In this validation exercise parameters of the peridynamic model are adjusted to fit the experimentally observed pit diameter, average length of radial cracks and rebound velocities for 4 impacts of 300 μm glass beads on ZnS. Results indicate that a reasonable fit of these impact characteristics can be obtained by suitable adjustment of the peridynamic input parameters, demonstrating that the MPG can be used effectively as a validation tool for impact modeling and that the peridynamic sand impact model described herein possesses not only a qualitative but also a quantitative ability to simulate sand impact events.

Paper Details

Date Published: 30 August 2017
PDF: 11 pages
Proc. SPIE 10179, Window and Dome Technologies and Materials XV, 101790U (30 August 2017); doi: 10.1117/12.2272829
Show Author Affiliations
Forrest E. Baber, Virginia Commonwealth Univ. (United States)
Brian J. Zelinski, Raytheon Missile Systems (United States)
Ibrahim Guven, Virginia Commonwealth Univ. (United States)
Perry Gray, NASA Marshall Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 10179:
Window and Dome Technologies and Materials XV
Brian J. Zelinski, Editor(s)

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