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Sliding mode interlaminar fracture toughness of interply hybrid composite materials
Author(s) -
Hwang ShunFa,
Huang ChihChing
Publication year - 1998
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.10126
Subject(s) - materials science , fracture toughness , composite material , strain energy release rate , enhanced data rates for gsm evolution , composite number , fracture (geology) , stacking , toughness , fracture mechanics , finite element method , structural engineering , telecommunications , physics , nuclear magnetic resonance , computer science , engineering
Abstract To measure the sliding mode interlaminar fracture toughness of interply hybrid composites, end notched flexure (ENF) specimens with three different types of stacking sequence have been utilized. Finite element analysis is applied to separate the contribution from different modes on the strain energy release rate. In addition, the methods of beam theory, compliance, and compliance calibration to calculate the G C values are compared. The effects of interface friction, crack length, and specimen width are also discussed. The results show that the crack growth in the three types of specimens is dominated by the sliding mode and the Mode II interlaminar fracture toughness can be approximated. The compliance method is not recommended for hybrid ENF specimens and the effects of interface friction can be neglected. To get rid of the edge effect, the specimen width must be carefully chosen, while the fracture toughness does increase with the initial crack length.