An Experimental Study of the Heat Generated During Cyclic Deformations of Glass-Epoxy Composites

摘要

Data are presented which show the effect of frequency and strain amplitude on glass-fiber reinforced plastic specimens subjected to torsional oscillations. The first part of this work is concerned with hysteresis loops recorded at frequencies of 120 cpm, and 300 cpm and angles of twist equal to 10 degrees, 15 degrees, and 20 degrees. Data corresponding to various ambient temperatures were also obtained. The second part deals with steady-state experiments, in which the specimen was oscillated until the surface temperature reached a steady-state value. The temperature and stress histories were recorded simultaneously. (Author)