thermal residual stresses effects on fatigue crack growth of repaired panels bounded with various composite materials精品.pdf

Composite Structures 89 (2009) 216–223 Contents lists available at ScienceDirect Composite Structures journal homepage: www.elsevi /locate/compstruct Thermal residual stresses effects on fatigue crack growth of repaired panels bounded with various composite materials Hossein Hosseini-Toudeshky *, Bijan Mohammadi Aerospace Engineering Department and Centre of Excellence in Computational Aerospace Engineering, Amirkabir University of Technology, 424 Hafez Avenue, Tehran, Iran a r t i c l e i n f o a b s t r a c t Article history: Thermal residual stresses, due to the curing cycle of the bonded composite patch affects the stress/strain Available online 8 August 2008 states and the crack patching efficiency of the single-side repaired aluminum panels. In this study the thermal residual stresses that occur as a result of the thermal expansion coefficient mismatch between Keywords: the patch and the underlying cracked aluminum panel are investigated. The fatigue crack-growth life Repair and the crack-front configuration of centrally cracked aluminum panels in mode-I condition with various Aluminum panels single-side repairs of glass/epoxy, graphite/epoxy and boron/epoxy composite patches are curried out. Composite Sensitivity of the obtained residual stresses to different curing temperatures of the repaired panels with Thermal Residual stresses