| 贝壳的力学性能和增韧机制 |
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| 引用本文： | 梁艳,赵杰,王来,李凤敏.贝壳的力学性能和增韧机制[J].机械强度,2007,29(3):507-511. |
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| 作者姓名： | 梁艳 赵杰 王来 李凤敏 |
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| 作者单位： | 大连理工大学,三束材料改性国家重点实验室,材料科学与工程学院,大连116023 |
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| 摘 要： | 对具有交错纹片结构的黄米螺壳进行压缩和三点弯曲实验.实验结果表明贝壳的力学性能与其显微结构密切相关,且存在各向异性.压缩和弯曲实验的结果表明,垂直于层面方向的承载能力均高于垂直于横截面方向的承载能力;当贝壳中的有机质被去除后,其三点弯曲强度只有原来的1/20～1/30.贝壳材料主要增韧机制为裂纹偏转和纤维拔出以及有机质的粘弹性作用.对贝壳材料增韧机制的仿生研究为复合材料的设计提供有益信息.
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| 关 键 词： | 贝壳 交错纹片结构 力学性能 增韧机制 贝壳材料 力学性能 增韧机制 SHELL TOUGHENING MECHANISMS PROPERTIES 信息 设计 复合材料 仿生研究 弹性作用 纤维拔出 裂纹偏转 三点弯曲强度 有机质 横截面 承载能力 方向 三点弯曲实验 存在 |
| 修稿时间： | 2005-09-222005-11-09 |
MECHANICAL PROPERTIES AND TOUGHENING MECHANISMS OF MOLLUSK SHELL |
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| LIANG Yan,ZHAO Jie,WANG Lai,LI FengMin.MECHANICAL PROPERTIES AND TOUGHENING MECHANISMS OF MOLLUSK SHELL[J].Journal of Mechanical Strength,2007,29(3):507-511. |
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| Authors: | LIANG Yan ZHAO Jie WANG Lai LI FengMin |
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| Affiliation: | State Key Laboratory for Materials Modification by Laszer, Ion and Electron Beams, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | The microstructure and mechanical properties of the shell of Conus betulina Linnaeus are investigated. The mechanical properties of the shell are anisotropic. The results indicates that both compressive and three-point bending strengths are higher in the direction perpendicular to plane direction than in the direction perpendicular to transverse section direction. After removing the organic layer in the shell, the three bending strength reduces significantly, about 1/20 to 1/30 of the original one. It is concluded that the crack deflection, fiber pull-out and viscoelastic effect of the organic layers are the dominant toughening mechanisms. The current research provides a biomimetic knowledge for comoosite material design. |
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| Keywords: | Mollusk shell Crossed-lamellar structure Mechanical properties Toughening mechanism |
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