Uncovering high-strain rate protection mechanism in nacre.

Scientific Reports
Zaiwang HuangXiaodong Li

Abstract

Under high-strain-rate compression (strain rate approximately 10(3) s(-1)), nacre (mother-of-pearl) exhibits surprisingly high fracture strength vis-à-vis under quasi-static loading (strain rate 10(-3) s(-1)). Nevertheless, the underlying mechanism responsible for such sharply different behaviors in these two loading modes remains completely unknown. Here we report a new deformation mechanism, adopted by nacre, the best-ever natural armor material, to protect itself against predatory penetrating impacts. It involves the emission of partial dislocations and the onset of deformation twinning that operate in a well-concerted manner to contribute to the increased high-strain-rate fracture strength of nacre. Our findings unveil that Mother Nature delicately uses an ingenious strain-rate-dependent stiffening mechanism with a purpose to fight against foreign attacks. These findings should serve as critical design guidelines for developing engineered body armor materials.

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Citations

Feb 20, 2016·Journal of Structural Biology·Shengnan WangXiaoxiang Wang
Apr 7, 2015·Materials Science & Engineering. C, Materials for Biological Applications·Chengli YaoHongying Li
Apr 14, 2016·Scientific Reports·Weizhu YangBaoxing Xu
Apr 23, 2013·Scientific Reports·Zaiwang Huang, Xiaodong Li
Jan 18, 2017·Scientific Reports·Hongmei JiDaolun Chen
Feb 13, 2013·Angewandte Chemie·Qunfeng ChengZhiyong Tang
Jul 4, 2019·Advanced Materials·Wei HuangDavid Kisailus
Jun 27, 2018·Scientific Reports·E A Flores-JohnsonL Shen
Jan 27, 2019·Scientific Reports·Satoshi MiuraTomoyuki Miyashita
Jul 4, 2020·Environmental Science and Pollution Research International·Mrunalini PadoleBalasubramanian Kandasubramanian
Aug 19, 2020·Nature Materials·Wei HuangDavid Kisailus
Aug 18, 2012·Advanced Materials·Jae-Hwang LeeEdwin L Thomas
Mar 25, 2017·Physical Review Letters·Jialin LiuYue Qi
Oct 17, 2017·Scientific Reports·Saleh AlghamdiMandar Dewoolkar
Oct 4, 2012·Physical Review Letters·Zaiwang Huang, Xiaodong Li
Jan 12, 2020·Materials Science & Engineering. C, Materials for Biological Applications·H M JiD L Chen
Jul 13, 2012·Nano Letters·Jae-Hwang LeeEdwin L Thomas
Jan 8, 2019·ACS Applied Materials & Interfaces·Jiacheng HuangMajid Minary-Jolandan
Jun 20, 2020·ACS Applied Materials & Interfaces·Jabir UbaidS Kumar
Sep 21, 2021·ACS Biomaterials Science & Engineering·Si-Min LiangXiao-Wu Li

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Methods Mentioned

BETA
atomic force microscopy
transmission electron microscopy
electron diffraction

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