title: An integrated approach of topology optimized design and selective laser melting process for titanium implants materials.
abstract: The load-bearing bone implants materials should have sufficient stiffness and large porosity, which are interacted since larger porosity causes lower mechanical properties. This paper is to seek the maximum stiffness architecture with the constraint of specific volume fraction by topology optimization approach, that is, maximum porosity can be achieved with predefine stiffness properties. The effective elastic modulus of conventional cubic and topology optimized scaffolds were calculated using finite element analysis (FEA) method; also, some specimens with different porosities of 41.1%, 50.3%, 60.2% and 70.7% respectively were fabricated by Selective Laser Melting (SLM) process and were tested by compression test. Results showed that the computational effective elastic modulus of optimized scaffolds was approximately 13% higher than cubic scaffolds, the experimental stiffness values were reduced by 76% than the computational ones. The combination of topology optimization approach and SLM process would be available for development of titanium implants materials in consideration of both porosity and mechanical stiffness.
authors.affiliation: School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, People's Republic of China.
authors.forename: Dongming
authors.initials: D
authors.lastname: Xiao
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Yang
authors.forename: Xubin
authors.initials: X
authors.lastname: Su
authors.forename: Di
authors.initials: D
authors.lastname: Wang
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Sun
mesh_terms: D003198:Computer Simulation; D055119:Elastic Modulus / Q000528:radiation effects; D019544:Equipment Failure Analysis; D020342:Finite Element Analysis; D006244:Hardness / Q000528:radiation effects; D006361:Heating / Q000379:methods*; D007834:Lasers; D008422:Materials Testing; D008956:Models, Chemical; D019736:Prostheses and Implants; D011474:Prosthesis Design; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D014025:Titanium