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Proceedings Paper

Peridynamic analysis of indentation and impact of coated and uncoated electro-optical materials
Author(s): Rachel Waxman; W. Howard Poisl; Ibrahim Guven
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Paper Abstract

A peridynamic model for sand impact damage has been developed. 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 application of the model to systems with coatings. Two different coating materials were included in the modeling effort. The required material parameters of critical stretch, which governs the material failure and fracture, and yield strength, were extracted from peridynamic simulations of experimental results of indentation tests. The model was then applied to impact conditions for which experimental measurements of damage characteristics were available. Peridynamic approach enabled investigation of the mechanical properties of interfaces between the coatings and the substrate. This study demonstrates current computational approach and its quantitative ability to simulate sand impact events.

Paper Details

Date Published: 13 May 2019
PDF: 26 pages
Proc. SPIE 10985, Window and Dome Technologies and Materials XVI, 109850E (13 May 2019); doi: 10.1117/12.2519582
Show Author Affiliations
Rachel Waxman, Virginia Commonwealth Univ. (United States)
W. Howard Poisl, Raytheon Missile Systems (United States)
Ibrahim Guven, Virginia Commonwealth Univ. (United States)

Published in SPIE Proceedings Vol. 10985:
Window and Dome Technologies and Materials XVI
W. Howard Poisl, Editor(s)

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