Effect of Heat-Treat Condition on Residual Strength of Metal Matrix Composites
Michelove, Leon D. and Caruso, Richard P. and Adams, Pamela and Fossey, William H., Jr.
Several different investigators have experimentally observed extended plasticity in the location of center notched boron/aluminum metal matrix composite specimens. This plasticity or matrix yielding is constrained by the intact fibers to a longitudinal region perpendicular to a transversely extending crack. It was also observed that an annealed rather than a high strength heat treated aluminum matrix gave better fatigue results due to this extended plasticity. A mathematical model to predict this type of extended plastic behavior is developed using an improved shear lag theory. It was found that the plasticity did not extend beyond the crack tip into the region between the intact fibers, but was actually residual yielding and permanent deformation left behind after the crack propagates. The dependence of crack opening displacement on crack size and matrix material properties is presented.
L. R. Dharani and M. W. Kennett, "Effect of Heat-Treat Condition on Residual Strength of Metal Matrix Composites," National SAMPE Technical Conference, Society for the Advancement of Material and Process Engineering (SAMPE) Publishing, Jan 1990.
National SAMPE Technical Conference (1990, Boston, MA, USA)
Mechanical and Aerospace Engineering
Article - Conference proceedings
© 1990 Society for the Advancement of Material and Process Engineering (SAMPE) Publishing, All rights reserved.
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