The Simulation Method of Solving the Cracking Problem of Knuckle Under the Vehicle’s Misuse Test

This paper introduce a method to simulate the fracture of vehicle’s front knuckle under the vehicle misuse test. The general idea to solve this problem is to install the wheel force transducer on the vehicle to collect the load signals of the vehicle under the vehicle misuse test, and decompose the load signals of the vehicle’s wheel center to the load signals of the hard points of the front knuckle through MBS software. However, due to the large impact load of the vehicle’s wheel load under the vehicle misuse test, the accuracy of the wheel force transducer cannot meet the requirements, and the transducer may even be damaged. Therefore, in this paper, force sensors and acceleration sensors are arranged on the internal parts of the vehicle, and the simulation method of virtual iterative is adopted to solve the load signal of the hard point of the front knuckle. The load signal of the hard point of the front knuckle is input into the FEM simulation software, and the strain distribution of the front knuckle is solved and compared with the test results. The comparison results show that the max strain of the knuckle under the simulation exceeds the strain value of the material fracture, and it is consistent with the cracking part of the knuckle under the vehicle misuse test, which validates the correctness of the simulation method.