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Statistical Analysis of Fatigue of Composite Materials.

Pei Chi Chou, ASD Wang

Abstract

The objectives of the program are to study three basic hypotheses in fatigue of composite materials. Theese are: (1) cyclic loading degradates the matrix properties and thus lower the compression strength more than tension-strength; (2) the static strength and fatigue life have equal ranks; and (3) the residual strength may increase. Both analytical and experimental approaches are used. The results are not yet conclusive. A sudden-death model is proposed to measure the degration of residual strength. Three regimes of residual strength are distinguished, these are the increase of strength, weak degradation, and strong degradation. (Author)

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Key concepts: Residual strength, Goodman relation, Fatigue limit, Residual, Materials science, Strength of materials, Composite number, Compression (physics)