SEDL / STP / STP1387-EB / STP13497S

Analysis of Characterization Methods for Inelastic Composite Material Deformation Under Multiaxial Stresses

Ahmad, J
Research Applications, Inc., San Diego, CA

Newaz, GM
Wayne State University, Detroit, MI

Nicholas, T
Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB, OH

Pages: 13    Published: Jan 2000

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Abstract

Off-axis tension (OAT) tests and biaxially loaded cruciform-shaped specimen (BC) tests on unidirectional fiber-reinforced metal matrix composites are subjected to detailed analyses using a newly developed model. The results indicate that the off-axis tension test is a viable method for biaxial stress-strain characterization of composites in the nonlinear deformation range. It is found that, besides being much more expensive to conduct, the specific cruciform-shaped specimen test considered in the study is less amenable to unambiguous interpretation.