ACOUSTIC-BACKSCATTERING STUDIES OF TRANSVERSE CRACKS IN COMPOSITE THICK LAMINATES

被引：8
|
作者：
RAJU, BB
机构：
[1] Univ of Dayton-Research Inst,, Dayton, OH, USA, Univ of Dayton-Research Inst, Dayton, OH, USA
来源：
EXPERIMENTAL MECHANICS | 1986年 / 26卷 / 01期
关键词：
ACOUSTIC WAVES - Scattering - COMPOSITE MATERIALS - Fatigue - PLASTICS; REINFORCED; -; Fibers;
D O I：
10.1007/BF02319959
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The distribution of first-ply transverse cracks in graphite/epoxy 0. 5-in. thick laminates was scanned by the acoustic-backscattering technique. The backscattering scans reveal a discrete number of characteristic dark bands in the case of specimens subjected to static loads or a low number of fatigue-load cycles. A dark band extending along the length of the specimen was obtained in specimens subjected to a high number of fatigue-load cycles. These dark bands reveal the three-dimensional distribution of transverse cracks situated in several adjacent planes. X-ray radiography shows the projection of the three-dimensional distribution of transverse cracks in the laminate plane and hence it may provide a low estimate of the distribution of transverse cracks in composite thick specimens.
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页码：71 / 78
页数：8
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