The Characterization of Boron/Aluminum Composite as an Orthotropic Elastic-Plastic Material
Interim rept. Jun 1982-Jun 1985
PURDUE UNIV LAFAYETTE IN SCHOOL OF AERONAUTICS AND ASTRONAUTICS
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Preliminary testing showed that Boronaluminum displayed nearly linear elastic behavior up to failure when stressed in the fiber direction, but proved to be quite ductile in off-axis tests. Further, fatigue cracks could not be grown through the fibers but would always propagate parallel to the fibers irrespective of the initial orientation of the crack. An in-depth study of the room temperature tensile behavior of boronaluminum composite was conducted. This behavior was accurately described using an orthotropic elastic-plastic constitutive model. An investigation into the crack-tip plastic zones in boronaluminum was conducted both experimentally and analytically, and the results help explain the fatigue growth pattern.
- Laminates and Composite Materials
- Properties of Metals and Alloys