Modeling mechanical responses in a laminated biocomposite Part II Nonlinear responses and nuances of nanostructure

摘要: Accurate pseudo-hexagonal nanoarchitecture of nacre was used to design three dimensional finite element models nacre, the inner layer mollusk shells. Tensile tests were simulated introducing linear and nonlinear material properties in these models. Material parameters components (aragonitic bricks complex organic phase) such as elastic modulus hardness obtained from bulk measurements reported literature. In addition, nanoscale experiments conducted using atomic force microscopy nanoindentation provided mechanical aragonite platelets phase. Linear simulations regime at low stresses (2 MPa) on new Our indicate that a high phase (∼20 GPa) is necessary obtain experimentally response nacre. also confirmed simulations. Further under assumption fully behavior an elastoplastic model for yield stress varied over wide range 40 400 MPa . The resulting compared value. Again our exceptionally Further, nanostructural nuances form platelet-platelet mineral contacts incorporated role responses loads quantitatively evaluated. first time presence has minimal effect both As matter fact, are regions concentration they break long before begins (∼50 MPa). These results have significant ramifications biomimetic scalable nanocomposites mimicking C