The General Plane Stress Failure of Boron Aluminum Composites. Part II. Phase I: Theoretical Analysis of Cylindrical Tubes for Characterization of Boron/Aluminum Composites. Phase II: Plasticity and Combined Loading Analysis of Cylindrical Tubes for Characterization of Boron/Aluminum Composites.
Final technical rept. 17 May 71-15 Jun 72,
WASHINGTON UNIV ST LOUIS MO MATERIALS RESEARCH LAB
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The purpose of the study is to determine the adequacy of laminate theory in predicting off-axis elastic modulus compared to finite element simulation of the response of boronaluminum tubes. Gripping effects and stress distribution uniformity are considered for anisotropic tubes. The analysis indicates that in the gage section boronaluminum behaves essentially as an isotropic material when tD or 0.05. Consequently, the simplifying assumptions of shell theory can be directly applied to their analysis. It is concluded that 1 failure in the grip section will be substantially less likely to occur than with boron or graphiteepoxy systems, 2 stresses will be nearly uniform in the gage section, and 3 only minor extraneous stress effects will be generated. Modified author abstract
- Laminates and Composite Materials