Different models for simulation of mechanical behaviour of porous materials.

摘要: Commercially pure Titanium (cpTi) and its alloys are the most successful metallic biomaterials for bone replacement, due to excellent biomechanical biofunctional balance. However, these materials have higher elastic modulus when compared with bone, leading stress-shielding phenomenon promoting resorption. Development of porous implants low modulus, providing a good mechanical functional balance (suitable strength optimum osseointegration), is focus emergent research in advanced Ti-based alloy biomaterials. With aim understanding behaviour relation porosity level morphology, new improved model three different versions been developed this work. The proposed FE combines simplicity 2D periodic geometry complex information pore morphology extracted from experimentation. methodology generate simulated microstructure based on series nxn pores distributed square matrix. differ way building geometry. In first version ("Basic-Pattern Model"), supposed be circular periodically matrix, following perfect pattern. second ("Pattern Model") similar previous one, but elliptic randomly generated, statistical experiments. third ("Semi-random controlled random distribution obtained by including randomness factors both directions. By making use versions, five titanium space-holders technique (with porosities θ = 28%, 37%, 47%, 57% 66%) modeled experimental macroscopic has simulated, showing relatively agreement results.