Fibres in processing and use, generally in the form of fabrics, are inevitably subjected to repetitive straining. The result is that they undergo a fatigue action, often in the presence of a chemical environment, which can seriously reduce their useful life. The search for a laboratory test with a form of failure similar to that commonly found in worn materials, namely multiple splitting of the fibres, has led to a new form of fatigue test (figure 1). This form of test, known as “biaxial rotation over a pin” and which involves the tension-compression of fibres which are rotated whilst bent over a pin, was first suggested by Goswami and Hearle1, and developed in the work of Hearle with Wong2,3,4, Calil5,6, and Hasnain7.
KeywordsFatigue Life Cotton Fibre Fatigue Failure Polypropylene Fibre Liquid Environment
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