Influence of quality control variables on failure of graphite/epoxy under extreme moisture conditionsTension tests on graphite/epoxy composites were performed to determine the influence of various quality control variables on failure strength as a function of moisture and moderate temperatures. The extremely high and low moisture contents investigated were found to have less effect upon properties than did temperature or the quality control variables of specimen flaws and prepreg batch to batch variations. In particular, specimen flaws were found to drastically reduce the predicted strength of the composite, whereas specimens from different batches of prepreg displayed differences in strength as a function of temperature and extreme moisture exposure. The findings illustrate the need for careful specimen preparation, studies of flaw sensitvity, and careful quality control in any study of composite materials. Previously announced in STAR as N80-33493
Document ID
19830051907
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Clements, L. L. (San Jose State University San Jose, CA, United States)
Lee, P. R. (United Technologies Corp. Chemical Systems Div., Sunnyvale, CA, United States)