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[2018-Vol.15-Issue 1]Investigation of Punch Resistance of the Allomyrira dichtoloma Beetle Forewing

Post: 2018-03-15 13:44 View:2312

Journal of Bionic Engineering

Volume 15, Issue 1, October 2018, Pages 57-68.

Ngoc San Ha^1,2, Vinh Tung Le¹, Nam Seo Goo^1*

1. Smart Microsystem Research Laboratory, Department of Advanced Technology Fusion, Division of Interdisciplinary Studies, Konkuk University, Seoul 05029, Republic of Korea

2. Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia

Abstract In this study, the punch resistance of the beetle forewing was investigated to address the ability of the forewing against the external force. The punch resistance of the forewing was measured for different sizes and sexes of beetles using a conventional testing method in conjunction with the Digital Image Correlation (DIC) technique. The results showed that the maximum fracture load was measured around 23 N for the female beetle and around 20.2 N for the male beetle in the front-side punch test. Moreover, the fracture load in the front-side punch test was higher than that in the back-side punch test for both male and female beetles. This means that the beetle forewing plays a protection role against external loads. Furthermore, the puncture energy in the front-side punch test for the female beetle (6.91 mJ) was a little higher than that for the male beetle (5.27 mJ). In addition, the DIC results revealed that the first crack occurred along the trachea line and the second crack then appeared in the direction that was perpendicular to the direction of the first crack. This study provides a comprehensive understanding of the mechanical protection properties of the beetle forewing and offers a good lesson for studying lightweight bio-inspired composite material.

Key words：beetle forewing punch test punch energy digital image correlation

Full text is available at http://jbe.jlu.edu.cn/EN/Y2018/V15/I1/57