Application of Resistance Curves to Residual Strength Prediction

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Abstract
A resistance curve approach to predicting residual strength of thin-skin structures, under plane stress type fracture, is discussed. Use is made of material resistance obtained in terms of crack extension as a function of the square root of J (JR). Prediction has been made of the residual strength of two types of structures, namely stiffened aircraft panels and thin-wall cylindrical pressure vessels. Elastic-plastic analysis based on a Dugdale-type strip plastic zone is used in the residual strength prediction. The analytical results are compared with available experimental data.

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