Tensile and compressive stress-strain behavior of heat treated boron-aluminumAn experimental study was conducted to assess the effects of heat treatment and cyclic mechanical loading on the tensile and compressive stress-strain behavior of six boron-aluminum composites having different laminate orientations and being subjected to different heat treatments. The heat treatments were as-fabricated, T6, and T6N consisting of T6 treatment followed by cryogenic quench in liquid nitrogen prior to testing. All laminates were tested in monotonic and cyclic compression, while the tensile-test data are taken from the literature for comparison purposes. It is shown that the linear elastic range of the T6- and T6N-condition specimens is larger than that of the as-fabricated specimens, and that cyclic loading in tension or compression strain hardens the specimens and extends the linear elastic range. For laminates containing 0-deg plies, the stress-strain behavior upon unloading is found to be nonlinear, whereas the other laminates exhibit a linear behavior upon unloading. Specimens in the T6 and T6N conditions show higher strain hardening than the as-fabricated specimens.
Document ID
19780053766
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kennedy, J. M. (NASA Langley Research Center Hampton, VA, United States)
Tenney, D. R. (NASA Langley Research Center Hampton, Va., United States)
Herakovich, C. T. (Virginia Polytechnic Institute and State University Blacksburg, Va., United States)
Date Acquired
August 9, 2013
Publication Date
April 1, 1978
Subject Category
Composite Materials
Meeting Information
Meeting: International Conference on Composite Materials