Critical Stress Intensity Factors Applied to Glass Reinforced Polyester Resin
- 1 February 1973
- journal article
- Published by SAGE Publications in Journal of Composite Materials
- Vol. 7 (2) , 146-159
- https://doi.org/10.1177/002199837300700201
Abstract
Geometrically similar double edge-notched fracture toughness speci mens of glass reinforced polyester resin were tested and the critical stress intensity factor ( Kc) determined. For a unidirectional fabric reinforcement with the crack positioned parallel to the fibres Kc did not depend on crack length. For chopped strand mat and balanced weave fabric reinforcement Kc increased with crack length. Using an equivalent yield stress corrected values of K c independent of crack length were determined. Using the corrected Kc values the failure of specimens containing a circular hole was predicted with reasonable accuracy.Keywords
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