Effect of crack tip damage on fracture of random fiber composites

摘要: Abstract Damage at the tip of a notch in random glass fiber reinforced epoxy resin has been observed and appears to initiate approximately 65% fracture load. The damage zone increases with increasing An effective crack length corresponding determined using compliance calibration technique. Pre-notched specimens have subjected constant load increase by measuring mouth displacements or changes. It is shown that occurs when critical value stress intensity factor reached.