Notched strength evaluation of fabric laminates having a circular hole

Abstract

modifications are suggested in the Whitney-Nuismer (WN) two stress fracture criteria known as the point stress criterion and average stress criterion for evaluating the notched strength of composite laminates having a circular hole.The linear relationship between the asymptotic value of the center cracked tension plate stress intensity factor and the notched strength of the infinite plate is used for the evaluation of the characteristic lengths to evaluate the notched strength of laminates. The analytical results based on the modified WN fracture models are compared well with the existing test results of fabric laminates of E-glass/epoxy.

Keywords:

• Notched strength
• fabric laminates
• circular hole
• point stress criterion
• average stress criterion
• characteristic lengths
• critical stress intensity factor