Characteristics of the Tensile Mechanical Properties of Fresh and Dry Forewings of Beetles

Based on a tensile experiment and observationwith scanning electron microscopy(SEM),thisstudy demonstrated the characteristics of the tensilemechanical properties of the fresh and dry forewingsof two types of beetles.The results revealed obviousdifferences in the tensile fracture morphology andcharacteristic of tensile mechanical properties

Based on a tensile experiment and observation with scanning electron microscopy （SEM）, this study demonstrated the characteristics of the tensile mechanical properties of the fresh and dry forewings of two types of beetles. The results revealed obvious differences in the tensile fracture morphology and characteristic of tensile mechanical properties of fresh and dry forewings of Cybister and A llomyrina dichotoma. There occurred a viscous, flow-like, polymer matrix plasticdeformation on the fracture surface of fresh forewings of the two beetles.