ZHANG Zhi-tao, LIANG Zeng-you
（College of Mechatronic Engineering, North University of China, Taiyuan 030051, China)
Abstract： As one of the oldest creatures on the earth, the tortoises have formed a nearly perfect shell structure after millions of years of evolution. In this paper, Chinese tortoise shell is studied. Firstly, the scanning model of the tortoise shell is established by means of computer tomography (CT) scanning technology and MIMICS software. Secondly, the solid model of three-dimensional structure of the tortoise shell is constructed by using geomagic studio reverse engineering software.Afterwards, the compression numerical simulation of the tortoise shell structure under low strain rate is conducted with the help of finite element software LS-DYNA. Finally, load-bearing characteristics of the tortoise shell structure and dome-shaped structure are compared and analyzed. The results show that compared withthe dome-shaped structure with the same volume, tortoise shell structure has a higher structural rigidity and can withstand higher pressure. Therefore, tortoise shell structure provide some reference to the design of armored vehicles, sheltersand other types of thin shell structures.
Key words： Chinese tortoise shell; computer tomography (CT) scanning; MIMICS software; reverse engineering; structural rigidity
CLD number： O342 Document code： A
Article ID： 1674-8042（2016）03-0235-06 doi： 10.3969/j.issn.1674-8042.2016.03.005
References
［1］ Damiens R, Rhee H, Hwang Y, et al. Compressive behavior of a turtle’s shell: experiment, modeling, and simulation. Journal of the Mechanical Behavior of Biomedical Aterials, 2012, (6): 106-112.
［2］ Rhee H, Horstemeyer M F, Hwang Y, et al. A study on the structure and mechanical behavior of the Terrapene carolina carapace: A pathway to design bioinspired synthetic composites. Journal of Materials Science C, 2009, 29(8): 2333-2339.
［3］ XU Yong-dong, ZHANG Li-tong. Investigation of mechanical properties and microsructure of tortoise shell. Acta Materiae Compositae Sinica, 1995, 12(3): 53-57.
［4］ ZHANG Wei, WU Cheng-wei, ZHANG Chen-chao, et al. Numerical study of themechanical response of tortoise shell. Journal of Bionic Engineering, 2012, (9): 330-335.
［5］ ZHANG Chen-chao. The mechanical analysis of the tortoise shell. Dalian:Dalian University of Technology, 2011.
［6］ LI Yu-peng, SUN Hong-sheng, LI Xiang. Structural reverse seeking and mechanics analysis of tortoise shell. Journal of Machine Design, 2008, 25(10): 54-57.
［7］ GENG Rong-sheng, JING Peng. On the flouring development of NDT techniques in China. Journal of Mechanical Engineering, 2013, 49(22): 1-7.
［8］ SU Xiu-yun, LIU Shu-bin. Clinical MIMICS software tutorial. Beijing: People’s Military Medical Press, 2011.
［9］ XU Liang, FAN Lu-fang, ZHOU Jia-zhen, et al. The research of 3D reconstruction method of Mimics V10.0 software. Chinese Journal of Modern Drug Application, 2008, 2(12): 32-34.
［10］ LI Gang. Research on free form surface reconstruction based on reverse engineering technology. Shandong: Shandong University, 2009.
［11］ FAN Yi-yan. Study and development on freeform surface reconstruction technology based on NURBS. Tianjin: Tianjin University, 2004.
［12］ ZHANG Bo-yi, ZHAI Dong-xian, SUN Jian, et al. Numerical simulation dynamics response of blast-resistance door with built-in aluminum matrix syntactic foam. Acta Armamentarii. 2014, 35: 263-267.
［13］ WU Chang-feng. A special vehicle square cabin finite analysis and optimization. Nanjing: Nanjing University of Science and Technology, 2009.
草龟龟壳结构力学性能初探
张志涛， 梁增友
（中北大学 机电工程学院， 山西 太原 030051）
摘 要: 乌龟作为地球上最为古老的生物之一， 在上亿年的进化中， 形成了趋于完美的龟壳结构。 以中华草龟龟壳为研究对象， 利用CT扫描技术以及MIMICS软件建立了龟壳扫描模型， 通过geomagic studio逆向工程软件完成龟壳三维结构的实体建模。 利用LS-DYNA有限元软件对龟壳结构进行了低应变率下的压缩数值仿真， 并分析比较了龟壳结构与圆拱形结构的承载特点。 结果表明， 与相同体积的圆拱形结构相比， 龟壳结构有较高的结构刚度， 可以承受更高的压力。 龟壳结构对装甲车辆、方舱等薄壳类结构设计有一定的借鉴作用。
关键词: 中华草龟； CT扫描； MIMICS软件； 逆向工程； 结构刚度
引用格式： ZHANG Zhi-tao, LIANG Zeng-you. Exploration of tortoise shell structure mechanical characteristics. Journal of Measurement Science and Instrumentation, 2016, 7(3)： 235-240. ［doi： 10. 3969／j.issn.1674-8042.2016.03.005］
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