Microstructure observation and mechanical behavior modeling for limnetic nacre

被引：0
作者：
Shuchun Zuo
Yueguang Wei
机构：
[1] Chinese Academy of Sciences,LNM Institute of Mechanics
来源：
Acta Mechanica Sinica | 2008年 / 24卷
关键词：
Nacre; Microstructure; Shear-lag model; Mechanical property;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In the present research, microstructure of a kind of limnetic shell (Hyriopsis cumingii) is observed and measured by using the scanning electron microscopy, and mechanical behavior experiments of the shell nacre are carried out by using bending and tensile tests. The dependence of mechanical properties of the shell nacre on its microstructure is analyzed by using a modified shear-lag model, and the overall stress–strain relation is obtained. The experimental results reveal that the mechanical properties of shell nacre strongly depend on the water contents of the limnetic shell. Dry nacre shows a brittle behavior, whereas wetting nacre displays a strong ductility. Compared to the tensile test, the bending test overestimates the strength and underestimates the Young’s modulus. The modified shear-lag model can characterize the deformation features of nacre effectively.
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页码：83 / 89
页数：6
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