INVESTIGATION OF EFFECT OF MATERIAL VARIABLES ON SHEAR PROPERTIES OF ORTHOGONAL FILAMENT WOUND MATERIALS. REINFORCED PLASTICS FOR DEEP SUB MERGENCE AND OTHER HIGH STRENGTH APPLICATIONS.

The influence of a number of material variables on the interlaminar shear strength of orthogonal filament wound materials has been investigated. Included in these studies were different types of reinforcement, reinforcement finishes, meth ods of winding wet and prepreg, and fiber dispersions. It was determined that in all cases in which solid filament constituted the reinforcement, mode of failure was by shear at an interface between layers of crossed fibers rather than within a circ or long layer. In the case of a hollow fiber laminate, failure oc curred both at a crossed fiber interface and within a layer of cross fibers, at lower shear values than solid filament materials. Author