Dynamic load checking method and device for steering knuckle and computer storage medium

Abstract

The invention discloses a dynamic load checking method of a steering knuckle. The method comprises the following steps: acquiring a plurality of equivalent stresses and a plurality of effective fracture strains correspondingly acquired by round bar tensile tests at different temperatures and different strain rates; fitting a relational expression of the stress, the strain rate and the temperatureaccording to different temperatures, different strain rates and a plurality of corresponding equivalent stress; fitting a relational expression between the effective fracture strain and the accumulated damage parameter according to different temperatures, different strain rates and a plurality of corresponding effective fracture strains; and according to the relational expression of the stress, the strain rate and the temperature and the relational expression of the effective fracture strain and the accumulated damage parameter, adopting the set load level to perform impact simulation on the knuckle, and adopting a finite element algorithm to calculate the accumulated damage parameter used for representing different load levels. According to the dynamic load checking method and device forthe steering knuckle and the computer storage medium, the impact resistance of the steering knuckle can be accurately predicted, and the risk position can be found in advance to provide help for optimization design.

Description

technical field [0001] The invention relates to the technical field of steering knuckles, in particular to a dynamic load checking method, device and computer storage medium of a steering knuckle. Background technique [0002] As one of the very important safety parts on the car chassis, the steering knuckle not only bears the force of the ground through the tires, but also acts as a bridge hub connecting the car body, suspension system, front axle, steering system and brakes. The harsh working environment and special functions of the steering knuckle determine that it plays an important role, especially when the car is running, it is easily deformed and broken by the lateral impact load, and in severe cases, it will cause traffic accidents. Therefore, it is required It has high impact strength. However, there are mainly two existing methods for checking the impact resistance of steering knuckles: one is the virtual impact analysis method, which simulates the impact process...

AI Technical Summary

Problems solved by technology

However, the virtual impact analysis method only considers the relationship between stress and strain, and does not consider the effect of strain rate on material hardening and temperature on the softening effect of structure, while the experimental impact method requires benches and samples, which is time-consuming, laborious, and inefficient

Therefore, the above method has problems such as difficulty in accurately predicting the impact resistance of the steering knuckle and finding the risk position in advance.

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