Affiliation:
1. Center for Applied Polymer Research and Department of Macromolecular Science Case Western Reserve University Cleveland, OH 44106
Abstract
Damage processes during cyclic deformation of short glass fiber reinforced liquid crystalline polyesters (LCP) have been investigated by acoustic emission (AE) source location techniques. The approach consisted of placing two sensors equidistant from a notch and monitoring the AE signals emitted from damage accumulation as cycling progressed. This was done in conjunction with a video-camera recording system and an infra-red thermal measuring device. The visual and thermal data indicated that no measur able stable crack propagation occurred. Acoustic emission measurements suggested that failure resulted in the last 20% of the cycling time by a damage-related microcracking mechanism. Three-dimensional linear location plots showed that damage was very local ized in the notch region in the reinforced materials and somewhat broader in the neat LCP resin. Correlations between the location of damage, the time and stress level at which it occurred as well as its AE amplitude characteristics have been made.
Subject
Materials Chemistry,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites
Cited by
13 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献