A NEW EXPERIMENTAL TECHNIQUE TO CHARACTERIZE THE FIBER CRUSH AND FIBER SHEAR BEHAVIOR OF COMPOSITES AT QUASI-STATIC AND HIGH RATES OF STRAINS

摘要

A new experimental method is developed to determine the fiber crush strength (SFC) and fiber shear strength (SFS) of composite materials following a punch shear test methodology. The material parameters SFC and SFS are used to model the damage behavior of thick-section composites as described in the LS-Dyna material model MAT_ COMPOSITE _DMG _ MSC, aka MAT162. The quasi-static experimental methodology is further extended to investigate the rate effect on SFS using a Hopkinson bar direct impact punch shear test method.