An experimental evaluation of apparent strain from foil strain gauges attached to carbon composite substratesAn experimental evaluation of apparent thermal strains is conducted using various combinations of substrate/gauge/attachment structure and redundant high temperature extensometry. It is found that the extensometry could either confirm independent measurements of the substrate's thermal expansion, or quantify nonzero mechanical strains resulting from uncertain material behavior and boundary conditions. Apparent strain and thermal expansion behavior data can then be used to modify the raw strain measurements in order to determine either stress producing or total strains. Limitation of the correction procedure for the three selected strain gauges is noted which is due to relatively large gauge/attachment variability.
Document ID
19870054923
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Scott, B. R. (Morton Thiokol Elkton, MD, United States)
Lanius, S. J. (Morton Thiokol Elkton, MD, United States)
Auer, C. W. (Morton Thiokol, Inc. Elkton, MD, United States)