Low cycle fatigue (LCF) of laminate composite structures used in Army applications is assessed to identify the key physical phenomena occurring during LCF processes and to determine their main characteristics. Special attention is given to the LCF conditions inherent in Army structures (i.e., high cyclic or pulse loads reaching up to 90% of the ultimate strength in a fraction of a second). A summary of fatigue-related issues ...
This report presents the results of mechanical and ballistic tests on polyester and polyurethane-based composites of polypyrrole-coated 5-2 glass fabrics. The fabrics were obtained from the Milliken Research Corporation, Spartanburg, SC. The data support the proposition that the glass fibers are, at most, slightly damaged by the coating process that requires an acidic solution of pH 1. The mechanical properties of the interface between the glass ...
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