Effect of Scratch Depths on Fatigue Properties of PMMA for Aircraft Canopies

Xin Hong Shi; Mei Juan Shan

doi:10.4028/www.scientific.net/AMM.687-691.81

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 687-691Effect of Scratch Depths on Fatigue Properties of...

Effect of Scratch Depths on Fatigue Properties of PMMA for Aircraft Canopies

Abstract:

A series of fatigue tests is performed for polymethyl methacrylate (PMMA) specimens without scratches and with scratches. The scratch depth is set to be 0.2mm, 0.3mm and 0.4mm, respectively. Based on the experimental results, it can be deduced that contained fatigue limit of specimens with scratches significantly decreases compared to specimens without scratches. Besides, contained fatigue limit decreases gradually with scratch depth increasing from 0.0mm to 0.4mm. Consequently, it can be concluded that fatigue properties of PMMA will decrease when there exists scratch and for scratch depth from 0.0mm to 0.4mm, fatigue property decreases remarkably with deeper scratch.