Stress and Modal Analysis of Six-Axis Articulated Robot Using ANSYS

Abstract

Industrial robots are used in pick and place, and various other operations in industries. So in this paper, the aim is to find out the stresses and modal analysis of different points of a six-axis industrial robot to determine its maximum shear stress, natural frequencies, and mode shapes. The optimum stress and modal analysis are done by finite element analysis (FEA) using the ANSYS workbench. For this analysis, the mesh size is taken as 0.01 mm. Different values of loads are applied on the griper to find out the maximum value of stress. For modal analysis, different cracks on the robot are considered. The modal shapes and natural frequencies for robot with crack and without crack are compared to find the weak part on the robot structure so that any design modifications can be done in order to make the robot more efficient for industrial work.