Accession Number:

ADA256742

Title:

The Characterization of Boron/Aluminum Composite as an Orthotropic Elastic-Plastic Material

Descriptive Note:

Interim rept. Jun 1982-Jun 1985

Corporate Author:

PURDUE UNIV LAFAYETTE IN SCHOOL OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s):

Report Date:

1985-06-01

Pagination or Media Count:

110.0

Abstract:

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.

Subject Categories:

  • Laminates and Composite Materials
  • Properties of Metals and Alloys
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE