Compressive Stability of Delaminated Random Short-Fiber Composites, Part II—Experimental and Analytical Results

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Abstract
The basic mechanics and mechanisms of compressive stability of delaminated random short-fiber composites are studied. An experimental program, employing an SMC-R50 composite with built-in delaminations, is conducted to evaluate the validity of the mechanistic model and to demonstrate further the accuracy of the methods of analysis developed in the associate paper [1]. Excellent agreement between experimen tal results and analytical solutions is observed. Based on the analytical development, the fundamental compressive stability behavior of delaminated short-fiber composites is investigated by a comprehensive parametric study. The influence of delamination length, crack position, number of delaminations, and composite plate length on the critical compressive stress and buckling modes is analyzed in detail. Possible crack growth in the delaminated composite subjected to in-plane compression is also studied.