草龟龟壳拱形结构承载特点分析

乌龟在经过亿万年的生物进化,结构、形态和功能等都得到全面的优化。以中华草龟龟壳为研究对象,利用CT断层扫描技术和MIMICS、Geomagic studio逆向工程软件,实现了草龟龟壳结构的三维模型重构。利用LS-DYNA有限元软件对龟壳的拱形结构进行了低应变率下的压缩数值仿真。分析比较了龟壳拱形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,龟壳拱形结构有较高的结构刚度,可以承受更高的压力;在压缩量相同的条件下,龟壳拱形结构能够保持较大的内腔容积。龟壳拱形结构对于薄壳类结构的设计具有一定的借鉴作用。

Tortoise Shell Arch Bearing Characteristics

]Turtle after millions of years of biological evolution, structure, form and function are all fully optimized. In this paper, the Chinese tortoise shell as the research object, using CT scanning technology and MIMICS, geomagic studio reverse engineering software to achieve a tortoise shell structure of three-dimensional model reconstruction. Use LS-DYNA finite element software arch shells were compressed numerical simulation low strain rates, analyzes and compares the characteristics of bearing shell and rounded arch structure, the results showed that: a circle with the same volume of compared arch, the arch shell structure has high rigidity, can withstand higher pressures; under conditions the same amount of compression, arched shell structure is maintained larger lumen volume. Arch shell for shell type structure design has a certain reference.