2019 Volume 12 Issue 2 Pages 87-93
Determining the relationship between the load generated by cooperative robots and the safety of human bone is essential while establishing technologies and standards in the field of cooperative robots. In this study, a three-point bending test to evaluate the strength of artificial bones has been proposed. First, the bending strength of an artificial radius and an artificial ulna is obtained through the bending test. Next, Finite Element Analysis (FEA) is used to estimate the bending strength of artificial bones. The bending strength of the artificial bones in four directions along a central axis is obtained along with the strengths and weaknesses for the load on each artificial bone in each direction. The FEA evaluation shows that the cancellous bones do not contribute to the strength of the other bones. In addition, efficacy of the FEA evaluation method is shown by comparing the strength of an artificial bone obtained through experiments with that determined using FEA. The comparison showed a difference of approximately 25% between the strengths obtained through the different methods, with the analytical result being the assessment of danger side.
