Design and simulation analysis of two dimensional axial torque force sensors

To meet the precise determination needs of the torque coefficient for high-strength bolted connections, it is necessary to measure both axial force and torque simultaneously. A two-dimensional force sensor using an elastic body structure was designed for this purpose, featuring piecing and bridge-grouping. The sensor's range is 100 kN for axial force and1kN·m for torque, enabling the decoupling of the measured force and torque, which significantly enhances the real-time measurement capabilities of the sensor. Based on finite element static analysis, a stress analysis of the sensor under the rated load of combined axial force/torque was conducted, ensuring safety in use. Furthermore, the sensor's inter-axis coupling and condition number were analyzed. The results showed that the condition number of the designed sensor's normalized strain flexibility matrix is close to 1, with a maximum inter-axis coupling error of 0.015%F.S. The designed sensor can achieve low inter-axis coupling, high sensitivity, and isotropy, thereby enabling more accurate measurements for high-strength bolt detectors.