Session: 01-09-01: Peridynamics and Its Applications

Paper Number: 109508

109508 - A Peridynamic Study on High Strain Rate Ceramic Material Response 

Ceramic materials commonly used in the aerospace industry have a substantial chance of encountering airborne particles during flight, leading to high-speed impact conditions. Such impacts produce high strain rate loadings on target materials and can cause a phase change in the material response. Furthermore, under high strain rate loadings, the mechanical properties of materials may change dynamically as a function of strain rate; materials may become stiffer and stronger. Understanding the material behavior under high-speed impact loading conditions is crucial to consider the material's strain rate dependency to identify the design limits. The brittle nature of ceramic materials and the highly dynamic character of high-speed impact problems must be incorporated to properly study strain rate-dependent aerospace material behavior.
In this study, Johnson-Holmquist-Beissel (JHB) material model, an equation of state for ceramic materials, is implemented within the state-based peridynamics framework. The peridynamics implementation of the JHB material model is validated against the experimental velocity interferometer system for any reflector (VISAR) measurements for plate impact tests of ceramic materials Boron Carbide (B4C) and Silicon Carbide (SiC). Well-known shock physics-related phases are identified on the free surface velocity profiles. The spalling event, an indicator of precursor damage in the material, is also examined in detail. After the validation through plate impact tests, penetration of a high-speed steel projectile into a bi-layered ceramic/metal target problem is considered. Failure mechanisms of ceramic materials are studied within the strain rate dependency context. Ballistic limit velocities are calculated, and a good agreement against the literature results is obtained.

Presenting Author: Ugur Can Virginia Commonwealth University

Presenting Author Biography: Ugur Can is a graduate research assistant and a Ph.D. student at Virginia Commonwealth University, Mechanical and Nuclear Engineering Department.

Authors:

Ugur Can Virginia Commonwealth University
Ibrahim Guven Virginia Commonwealth University