Stress and strain analysis from dynamic loads of mechanical hand using finite element method

摘要

This research discusses the distribution of stress and strain due to the dynamic loads of mechanical hand. Thestress and strain that occur on mechanical hand are the main concern for comparing the value of finite element analysis (FEA) and calculating for its material properties. The stress and strain analysis is done with a loading condition. The given loading condition is dynamic. The loading input condition in the simulation of using hydraulic hand dynamometer is from the grip strength measurement of ten samples.The form of the given loading to the mechanical hand is the increment value with a maximum of 708 N/m~2 within 1 minute. The amount of maximum stress (von Mises) simulation is 1.731xl0~5Pa, and the amount of maximum strain is 7.441×10~(-7). The amount of maximum reaction force is 5.864 x 10~(-2)N, while the amount of maximum displacement that occurs on the distal part is 1.223 x 10 m. Based on the analysis, the maximum stress and strain were found both to occurat the extension part. The result of this study has shown that the stress and strain still occurfar below from the yield strength and the shear strength from the material AISI 1010. It can be concluded that the mechanical hand is durablefor the given loading and can hold an object with a minimum diameter of 45 mm.