Research Progress on Residual Strength Prediction of Thin-walled Structures

The most important current approaches for residual strength prediction of thin-walled structures were reviewed.The detail process of residual strength prediction by using stress intensity factor,crack tip opening displacement δCTOD,crack tip opening angle ψCTOA,cohesive zone model parameters,separation energy,critical tensile stress and Gurson-Tvergaard-Needleman damage model was introduced and discussed with respect to their benefits and limitations for the simulation of plane and stiffened panels.In addition,specific aspects of modern non-integral and integral structures were addressed.These comprised multi-site damage,crack deviation and branching,welding residual stresses and strength mismatch in material compounds and problems in bonded structures.