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Stress model and strain energy release rate of a prescribed crack in scarf joint/repair of composite panels
An analytical model for stress distribution was derived and an analytical model for determining the strain energy release rate of a prescribed crack in a scarf joint or a bonded scarf repair of a composite panel was developed. The bondline was presumed to be thin, so the adhesive stresses were presumed to be uniform through the thickness. The coupled second-order differential equations obtained via kinematics and force equilibrium were solved semi-numerically using the symbolic computational tool Maple. Finite element analyses using the commercial software ABAQUS™ were conducted for comparison purposes, and results correlated well with the developed analytical model.
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