Reliability predictions of large composite structures with defects

摘要

This paper presents a methodology that enables engineers to address composite design uncertainty for large structures using a global/local approach based on finite element analysis. The study established the feasibility of reliability-based analysis and design methodology for bond integrity between the face sheet and the core of composite sandwich structures with uncertainty in design and manufacturing parameters. The study focused on delamination fracture as the failure mode and the mechanism was modelling using a virtual crack closure technique.