ISSN: 0090-3973
Page Count: 5

Dissipated Energy of Composite Materials—Part I: Cyclic Dynamic Stress

Bledzki, AK
Professorscientist,University of Kassel, Institut fuer Werkstofftechnik,

Gassan, J
Professorscientist,University of Kassel, Institut fuer Werkstofftechnik,

(Received 5 March 1997; accepted 2 March 1998)

Abstract

This paper presents a method for the estimation of the vibratory fatigue strength of composite materials that is based on the accumulated dissipated energy. The accumulated dissipated energy was measured with a special measuring technique, which is able to catch quasi-continuously the mechanical properties of the tested samples. The curves of the accumulated dissipated energy were approximated with an equation that includes several parameters. These parameters were identified for experiments with different types of load and for samples with different contents of micropores. For samples that reach more than 106 load cycles, the accumulated dissipated energy in one-load-stage tests is a linear function. With this, the fatigue limit of the samples can be predicted.

Keywords:
reinforced plastic, composites, fiberglass-epoxy composites, dissipated energy, accumulated dissipated energy, fatigue behavior, life prediction

Paper ID: JTE12028J
DOI: 10.1520/JTE12028J
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