Numerical Study of the Mechanical Response of Turtle Shell  

作　　者：Wei Zhang Chengwei Wu Chenzhao Zhang Zhen Chen 

机构地区：[1]State Key Laboratory of Structural Analysis for Industrial Equipment,Faculty of Vehicle Engineering and Mechanics,Dalian University of Technology,Dalian 116024,P.R.China [2]Department of Civil and Environmental Engineering,University of Missouri,Columbia,MO 65211-2200,USA [3]School of Materials Science&Engineering,Dalian University of Technology,Dalian 116024,P.R.China

出　　处：《Journal of Bionic Engineering》2012年第3期330-335,共6页仿生工程学报（英文版）

基　　金：Acknowledgments This work was supported by the National Natural Science Foundation of China （No.10972050 and No, 90816025）.

摘　　要：The turtle shell is an amazing structure optimized through the long-term evolution by nature. This paper reports the me- chanical respor/se of the shell （Red-ear turtle） to static and dynamic loads, respectively. It is found that the turtle shell under a compressive load yields the maximum vertical displacement at the rear end, but the vertical displacement at the front end is only half of that at the rear end. The maximum horizontal displacement of the shell also occurs at the rear end. It is believed that such a deformation pattern is helpful for protecting the turtle＇s internal organs and its head. The principal stress directions in the inside surface of the shell under a compressive load are almost the same as those of the biofiber distribution in the inside surface, which results in the strong bending resistance of the turtle shell.The turtle shell is an amazing structure optimized through the long-term evolution by nature. This paper reports the me- chanical respor/se of the shell （Red-ear turtle） to static and dynamic loads, respectively. It is found that the turtle shell under a compressive load yields the maximum vertical displacement at the rear end, but the vertical displacement at the front end is only half of that at the rear end. The maximum horizontal displacement of the shell also occurs at the rear end. It is believed that such a deformation pattern is helpful for protecting the turtle＇s internal organs and its head. The principal stress directions in the inside surface of the shell under a compressive load are almost the same as those of the biofiber distribution in the inside surface, which results in the strong bending resistance of the turtle shell.

关 键 词：biomaterial turtle shell mechanical response static and dynamic loads 

分 类 号：TV698.11[水利工程—水利水电工程] U416.217[交通运输工程—道路与铁道工程]