A crack growth resistance curve approach to fiber/metal laminate fracture toughness evaluation

摘要: Abstract Fiber/metal laminates consist of thin, high strength aluminum alloy sheets alternately bonded to plies fiber-reinforced epoxy adhesive. This new class material combines the best features organic matrix composites and metals. Tests conducted on wide centrally slotted panels show that fiber/metal laminates, like metals, exhibit capacity for slow stable tearing prior rapid fracture. It is also shown a fracture mechanics based R -curve approach, similar used can be applied predict effects size geometry laminate panel residual strength. These results represent an important step in development analytical practices damage tolerance airworthiness assessments.