Abstract
A centre-notched laminate beam method developed previously has been used to investigate the mode II delamination fracture of angled laminate interfaces. Tests have been performed on T300/914C carbon/epoxy and E/913G glass/epoxy composite specimens with +θ/-θ interface angles. A beam solution for the strain energy release rate associated with delamination propagation was adopted to derive the delamination initiation energy. For both materials systems, single, planar delamination fracture was observed in specimens with θ up to 7·5°. In specimens with θ between 7·5° and 30°, single delamination initiation was followed by intraply cracking and delamination deviation. In the carbon/epoxy case, intraply cracking and multiple delamination occurred at the initiation of fracture with θ between 30° and 45°. The mode II delamination initiation energy corresponding to single delamination did not show significant dependence on the relative interface angle for both systems, whereas that associated with multiple delamination mechanism increased with the angle.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
