Failure mechanisms in bolted CFRP

• Type: Article in International Scientific Journal
• Date: 1998

Authors

Camanho, PP (Author) FEUP; Bowron, S (Author) Other; Matthews, FL (Author) Other

Journal

Title: Journal of Reinforced Plastics and Composites

Vol. 17 No. 3

Pages: 205-233

ISSN: 0731-6844

Publisher: SAGE

Indexing

ISI Web of Knowledge - 57 Citations

Scopus - 87 Citations

Other information

Authenticus ID: P-008-P8R

Abstract (EN): An experimental investigation on the damage mechanisms of mechanically fastened joints in composite laminates is presented. This information concerning damage mechanisms is required before developing damage progression models. For double-lap joints with finger-tight washers, specimens that fail in the bearing, tension and shear-out modes are investigated. For fully failed specimens and for specimens loaded to several percentages of failure load. the damage mechanisms are investigated using X-radiography and sectioning. It is concluded that failure occurs by a process of damage accumulation, where the failure mechanisms present are fiber fracture, delamination at the laminate loaded hole, matrix cracks and related fiber microbuckling, and internal delamination. Modelling this interaction between failure mechanisms requires further analytical efforts. Due to the importance of the through-thickness stresses present at the hole boundary, delamination has a significant effect on the joint strength, so the use of a three-dimensional failure criterion is suggested.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 29