Crack surface interference under cyclic mode I and steady mode II loading

This paper reports experimental studies related to crack surface interference (CSI) under mixed mode conditions. It focuses on the features other than the well-recognized mode I or shear mode crack closure. Firstly, the near-tip strain gauge method, which was traditionally used for mode I crack closure measurement, was extended to mixed mode conditions. Two approaches were proposed to separate mode I and mode II related strains from raw strain...