title: Mechanical behavior of mother-of-pearl and pearl with flat and spherical laminations.
abstract: Laminated structure reduces the common inverse relationship of strength and toughness in many biological materials. Here the mechanical behavior of pearl and nacre with spherical and flat laminations was investigated and compared with the geological aragonite counterpart. The biological ceramics demonstrate higher strength, better reliability, and improved damage resistance owing to their laminated arrangement. Kinking and delamination occur in pearl to resist damage in addition to the crack-tip shielding mechanisms as in nacre, such as crack deflection, bridging, and platelet pull-out. The fracture mechanisms were interpreted in terms of the stress state using finite element simulation. This study may help clarify the compressive mechanics of laminated sphere between platens and advance the understanding on the mechanical behavior of biological and bio-inspired laminated materials.
authors: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
authors: D
authors: D
authors: Jiao
authors: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China. Electronic address: zqliu@berkeley.edu.
authors: Z Q
authors: ZQ
authors: Liu
authors: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
authors: Y K
authors: YK
authors: Zhu
authors: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
authors: Z Y
authors: ZY
authors: Weng
authors: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China. Electronic address: zhfzhang@imr.ac.cn.
authors: Z F
authors: ZF
authors: Zhang
mesh_terms: D002119:Calcium Carbonate / Q000737:chemistry*
chemical_list: D002119:Calcium Carbonate
keywords: Kinking; Laminated structure; Nacre; Pearl; Spherical laminations