ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 6

Comparison of Static and Dynamic Mechanical Properties of Some Epoxy-Matrix Composites

Jenness, JR
Principal scientist, Scitek, Inc., State College, Pa.

Kline, DE
Professor, The Pennsylvania State University, University Park, Pa.

Abstract

Static and dynamic elastic moduli in flexure were measured for a diglycidyl ether of bisphenol A cured with metaphenylenediamine and some particulate composites with this polymer as the matrix. If it is assumed that these materials have tensile moduli which are about 0.925 of their compressive moduli, as has been noted for another epoxy system, dynamic moduli determined at very low strain values by a free-free flexural resonance technique appear to be very nearly equal to the tensile moduli in static flexure. However, little correlation was observed between the dynamic mechanical properties and other static properties such as flexural strength. This is partially attributed to the difference in stress patterns in the static and dynamic tests.

Keywords:
mechanical properties, composite materials, non-destructive tests, flexural strength, modulus of elasticity, static tests, dynamic tests, stresses, resonance

Paper ID: JTE11680J
DOI: 10.1520/JTE11680J
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