Abstract
The normal triply periodic minimal surface (TPMS) is often used to design homogeneous or graded porous bone tissue, but the porous structure based on deformed TPMS has good mechanical properties in certain space direction. For simplify design process, a porous structure design method based on deformed TPMS is proposed. Deformed TPMS unit cell is designed with changing the magnitude factor of the TPMS trigonometric function expression. Exploring the influence of magnitude factor and threshold on the porous structure shape and porosity, and establishing the relationship between the pore characteristic parameters and the mathematical parameters, a parametric design method for deformed TPMS porous structure is investigated. This method implemented in the Grasshopper plugin of Rhinoceros, the porous structures with different porosity are designed. The results indicate the method can control the pore shape and porosity of the porous structure, and the design error is within the allowable range and conforms to the bone tissue porous structure design requirements.
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