Topology Optimization Design and Performance Study of Porous Titanium Alloys
To obtain titanium alloy porous structures with good mechanical properties and high permeability,a trade-off between the porosity of the porous structure and its strength needs to be maintained.Taking human knee tibial prosthesis as the research object,firstly,according to the stress state of the tibia,topology optimization was used to design and reconstruct the compressive and shear cell structures(TO-P1,TO-P2,TO-S1,TO-S2)under different loading conditions,and several common basic cell structures(bcc,fcc,rdc,dcc)were studied and compared;secondly,through compression and shear performance simulation of different types of porous titanium alloys,the mechanical properties of different topologies of porous titanium alloys were studied,and the porous titanium alloy compression samples were formed by SLM technology,and the validity of the simulation analysis was verified;finally,four porous titanium alloys with better mechanical properties were selected for permeability analysis.The results show that the TO-S2 structure has the best compressive,shear mechanical properties and permeability,and it is suitable for porous structures of compression-shear load type implants.