Multiscale topology optimization of pelvic bone for combined walking and running gait cycles

Abstract

We propose a multiscale topology optimization procedure of pelvic bone using weighted compliance minimization. In macroscale optimization, a level set-based method is used, which gives a binary structure. In microscale optimization, cubic lattice-based homogenization is done while keeping the global geometry fixed. For the macroscale, a volume constraint equal to the volume of the pelvic bone is imposed, whereas, for the microscale, a mass constraint equal to the mass of the pelvic bone is imposed. The optimal geometries are compared with pelvic bone using different metrics and show good similarity with the same. Designed geometries are additively manufactured and experimentally tested for stiffness.

Keywords:

• Compliance minimization
• homogenization
• level set
• additive manufacturing

Disclosure statement

No potential conflict of interest was reported by the authors.

Table 2. Weights for the multi-load case topology optimization for combined walking and running gait cycles.

Additional information

Funding

This work is partly funded by the ministry of higher education and human resource development, the government of India.