Abstract
To construct a design methodology for porous titanium mechanical parts, the linearity limit in the load vs. displacement curve has been predicted by the inner microscopic stress calculated by the micro-CT image-based modelling and finite element mesh superposition method. Two L-shaped specimen of porous titanium with different pore diameter, l8Ojsm and 90jim, have been tested. The strain measurement from macroscopic viewpoint by an optical instrument implied that the macroscopic strain/stress fails to predict the linearity limit. In the proposed numerical method, the homogenized macroscopic properties agreed well with the experimental results, and a consistent criterion to predict the linearity limit has been determined for the above two types of porous titanium parts.
