Effect of Shearing Distance on Mechanical Properties of Porous Titanium Plate Composed of One Titanium Fiber fabricated by Compression Shearing Method at Room Temperature

Abstract

In this study, with the aim of developing titanium fiber plates (TFPs) that do not generate contamination, the effect of shear distance on the mechanical properties of a TFP fabricated by cold compression shearing using a single titanium fiber was clarified. The occurrence of contamination assuming in vivo use was also evaluated. The results showed that as the shear distance increased, the flexural modulus, flexural strength, and 0.2 % proof stress of a long-fiber TFP increased, and the porosity decreased. Furthermore, both the long- and short-fiber TFPs have bending modulus close to that of a compact bone (10 to 30 GPa), and the porosity changes from about 5 to 25 % depending on the shear distance. Moreover, fatigue tests using molded bodies cut with metal scissors revealed that fibers did not fall off in the long-fiber TFP. On the basis of these results, in this study, we developed a TFP with a bending elastic modulus comparable to that of a compact bone, which does not cause fibers to fall off after being cut.