On the resistance of ceramics to high velocity penetration
MetadataShow full item record
It is known that high velocity penetration for ductile materials can be represented analytically by a modified hydrodynamic theory. The strength term for the target corresponds to the pressure required to expand a cavity, if the dynamic yield strength is substituted for the static yield strength. Indentation pressures are closely related to the cavity expansion pressures. In this paper it is shown that the key parameters for indentation in brittle materials are similar to but not identical to those for ductile materials. The strength terms for ceramics as measured in ballistic tests are much lower than would be predicted on the basis of the indentation measurements. It is found that the ratio of the target strength term to hardness increases as the fracture toughness of the targets increases. The findings on penetration resistance are used together with cavity expansion theory to estimate the relative size of the craters in ceramic targets. Keywords: Ceramic materials, Mathematical models, Ceramic armor
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
NPS Report NumberNPS73-88-001
Showing items related by title, author, creator and subject.
Marin, Joseph (1966-03);This paper suggests some new evaluations for multiaxial-stress properties of ceramic materials. These evaluations include some that have been used for other kinds of materials, as well as others which have not ...
FORECAST VALIDITY OF ALUMINUM AND STEEL MECHANICAL PROPERTY TRENDS BASED UPON MICROHARDNESS BEHAVIOR Talarico, Phillip M. (Monterey, CA; Naval Postgraduate School, 2019-12);Most metals used in naval applications are exposed to significant ultraviolet radiation and moisture; the most commonly constructed metals, steel and aluminum, are expected to lose their designed mechanical property integrity ...
Raisch, Kelly M. (Monterey, CA; Naval Postgraduate School, 2020-06);The study and use of the space domain, including the recent reinvigoration of manned space exploration to the moon and beyond, drives the search for higher-performance materials for spacecraft thermal protection systems ...