Experimental study on the microstructure and nanomechanical properties of the wing membrane of dragonfly

• 来源期刊: 力学学报（英文版）
• 年，卷（期）: 2007,（3）
• 页码范围: 281-285
• 页数: 5页
• 语种: 英文

摘要

Detailed investigations on the microstructure and the mechanical properties of the wing membrane of the dragonfly are carded out. It is found that in the direction of the thickness the membrane was divided into three layers rather than a single entity as traditionally considered,and on the surfaces the membrane displays a random distribution rough microstructure that is composed of numerous nanometer scale columns coated by the cuticle wax secreted.The characteristics of the surface structure are measured and described. The mechanical properties of the membranes taken separately from the wings of live and dead dragonflies are investigated by the nanoindentation technique. The Young's moduli obtained here are approximately two times greater than the previous result, and the reasons that yield the difference are discussed.