is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Commercially Pure Porous Titanium (CPPTi) can be used for surgical implants to avoid the stress shielding effect due to the mismatch between the mechanica l properties of titanium and bone . Most researchers in this area deal with randomly distributed pores or simple architectures in titanium alloys. The control of porosity, pore size and distribution is necessary to obtain implants with mechanical properties close to those of bone and to ensure their osseointegration . The aim of the present work was therefore to develop and characterize such a specific porous structure. First of all, the properties of titanium made by Selective Laser Melting (SLM) were characterized through experimental testing on bulk specimens. An elementary pattern of the porous structure was then designed to mimic the orthotropic properties of the human bone following several mechanical and geometrical criteria . Finite Element Analysis (FEA) was used to optimize the pattern . A porosity of 53% and pore sizes in the range of 860 to 1500 µm were fi.nally adopted . Tensile tests on porous samples were then carried out to validate the properties obtained numerically and identify the failure modes of the sam_ples. Final!y, FE elasto_plastic ana!yses were yerformed on the porous samples in order to propose a failure criterion for the design of porous substitutes . .

No abstract

No abstract