Secondary wrinkling analysis of rectangular membrane under shearing

In this study, we first propose the determination conditions of secondary wrinkling based on which we may obtain the secondary wrinkling region and critical load for membrane structures. The nonlinear post-wrinkling simulation is then performed to evaluate the determination conditions, as well as elucidate the wrinkling nature based on secondary wrinkling behavior analysis. In the end, the secondary wrinkling characteristics are experimentally tested using the non-contact digital image correlation technology. The results reveal that the proposed determination conditions are validated by the simulation and experiments. The secondary wrinkling is a split of old wrinkle which drives the wrinkling evolution in post-wrinkling progress. Our results will be of great benefit to the analysis and the control of the wrinkles in the membrane structures.