Multi-objective design optimization of 3D micro-architected implants
نویسندگان
چکیده
Recent advances in 3D printable micro-architected materials offer unprecedented possibilities for the development of highly tailored orthopaedic implants. These devices, which are typically made from fully solid materials, significantly alter load transmission to surrounding bone tissue, potentially leading interface instability and resorption. In this work, we present computational methods synthesize three dimensional (3D), patient-specific, implants with heterogeneous micro-architecture. Our method simultaneously minimizes risks load-induced fracture peri-prosthetic remodelling, while taking into account functional manufacturing constraints. We first develop a novel parametric micro-architecture desirable attributes wide range effective mechanical properties, including both positive negative Poisson’s ratios. then formulations optimize spatial configuration parameters order minimize risk post-operative remodelling. To that end, remodelling objective is devised, apposition resorption, predicted via model based on strain–energy density. The defined as maximum value multi-axial Hoffman failure criterion along interface. procedure applied design titanium hip prescribed conventional geometries compared, silico, implant homogeneous low-stiffness lattice design. optimized results performance improvement 64.0% terms 13.2% risk, compared
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ژورنال
عنوان ژورنال: Computer Methods in Applied Mechanics and Engineering
سال: 2022
ISSN: ['0045-7825', '1879-2138']
DOI: https://doi.org/10.1016/j.cma.2022.115102