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Abstract

Fracture behavior of particle filled epoxy and polyester polymer composite (PC) systems was investigated in Mode I fracture using single edge notched beams with varying notch depth. Influence of polymer content and polymer properties on the fracture behavior of polymer composite at room temperature were studied using a uniform sand. The results are analyzed to examine the applicability of fracture parameters such as critical stress intensity factor (K_IC ) and critical J-integral (J_IC ) to the PC systems. Epoxy PC and polyester PC are notch sensitive materials. At the same polymer content, the epoxy PC has better fracture properties than the polyester PC. The K_IC and J_IC for epoxy PC and polyester PC increases with increase in polymer content and PC flexural strength. The fracture parameters of PC systems are represented in terms of polymer content, polymer strength and PC strength. Also the relationship between K_IC and J_IC for the two PC systems has been investigated.

Keywords

Crack length critical J-integral critical stress intensity factor flexural properties notch sensitivity polymer composite.

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Fracture Properties of Particle Filled Polymer Composites

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