Experimental, theoretical, and computational investigation of bio-inspired structural materials
January 1, 2019
Biological (natural) materials display attractive properties such as the lightweight and the significantly better performance than their constituents. Bio-inspired structural (BIS) materials are synthetic materials which mimic the features of biological materials including stiff-soft mixtures, self-assembly, and hierarchical structures from nano-scale to micro-scale. In the near future, due to the rapid development of additive manufacturing technology, the BIS materials would become the most usage in any field of engineering. In order to provide the infrastructure for development of such special synthetic materials to satisfy severe operating conditions, the mechanical behavior of the BIS materials should be understood completely.
Research Projects
Modelling and design of bioinspired structural materials under cyclic and multi-axial loading
Li-Wei Liu, Ph.D., Wei-Tze Chang, Ph.D.
MOST 109-2221-E-006-004-MY3 (2020-2023)
The bioinspired structural (BIS) material is the synthetic material made by mimicking the features of biological materials that display attractive properties such as the lightweight and the significantly better performance than their constituents. In this project, we attempt to understand the mechanical behavior of BIS materials beyond elastic range under cyclic and multi-axial loading. Experimental, theoretical, and computational investigation of BIS materials from microscale to macroscale will be addressed. The influence of microstructure and also damage on behavior of BIS materials will be investigated experimentally and computationally. Damage distortional hardening models in the macroscale and piecewise-linear-multi-yield-surface (PLMYS) models in multi-scales will be established. Simulations of finite element methods (FEM) with return-free integrations in the macroscale and the peridynamics in the mesoscale as well as the molecular dynamics simulations in microscale will be conducted for the computational investigation of BIS materials. Two multiscale computational approaches will be developed with the aid of the combination of FEM, peridynamics, molecular, and PLMYS model in order to explore the mechanism of stiff-soft mixture and the secret of hierarchical architecture. Furthermore, new evaluations of BIS materials under cyclic and multi-axial loading will be developed in order to design the material.