MEASUREMENT OF ELASTIC MODULUS OF NACRE BY THREE-POINT BEND TEST
贝壳珍珠层不同取向弹性模量的研究

Elastic modulus test of nacre is significant to understanding the behavior of nacre and the biomimetic designing of materials. Elastic modulus of nacre in different orientation with respect to its growing trace direction was determined by using three-point bending tests, which is self-designed and equipped with laser displacement detector. The moduli of nacres in parallel and oblique directions with respect to the growing trace are 60.3 GPa and 56.7 GPa, while in perpendicular direction the elastic modulus is 48 GPa. The laminated microstructure of nacre and unique growing trace on the shell of mollusk contribute to the anisotropic modulus of elasticity.