The evaluation of a fracture from a thin layer constrained by a hard material is important in relation to the structural integrity of adhesive joints and composite materials. It has been reported that the fracture toughness of a crack in a ductile adhesive joint depends on the bond thickness, but the mechanism has not yet been elucidated clearly. In this study, the J-integral and the near-tip stress of a crack in an adhesive joint are investigated. It is determined that a decrease of the bond thickness increases the stress ahead of a crack rip, which results in the decrease of fracture toughness. [S0094-4289(00)01201-9]

Issue Section:
Technical Papers
Keywords:
adhesives, ductile fracture, composite materials, failure (mechanical)
Topics:
Adhesive joints, Adhesives, Fracture (Materials), Stress, Failure, Fracture toughness
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