Transient Stress Wave Propagation in One-Dimensional Micropolar Bodies

Report No. ARL-RP-238
Authors: C. L. Randow; G. A. Gazonas
Date/Pages: February 2009; 22 pages
Abstract: Certain types of structures and materials, such as engineered multi-scale systems and comminuted zones in failed ceramics, may be modeled using continuum theories incorporating additional kinematic degrees of freedom beyond the scope of classical continuum theories. If such material systems are to be subjected to high strain rate loads, such as those resulting from ballistic impact or blast, it will be necessary to develop models capable of describing transient stress wave propagation through these media. Such a model is formulated, solved, and applied to the impact between two bodies and to a two-layer bar or strip subjected to an instantaneously applied stress. Results from these examples suggest that the model parameters, and therefore constitutive properties and geometries, may be tuned to reduce and control the transmission of stress through these bodies.
Distribution: Approved for public release
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Last Update / Reviewed: February 1, 2009