Stress Analysis And Optimum Design Of Heavy Truck Drum Brake

Drum brake is adopted widely in heavy duty truck brake system, is the key to the brake system components. With the continuous development of infrastructure, high speed and load demand is growing, improve the car brake, ensure the safety of vehicle, force analysis and finite element analysis of the whole structure is of great value.Brake of the main performance indicators have the service life of the brake shoe friction slices, braking efficiency factor value and its stability, and drum brakes, brake shoe and lining on the stress distribution, directly or indirectly affect all three key performance indicators., in the process of automobile brake drum brakes, brake shoe in the role of the force of wheel cylinder to the rotation of the brake drum, and the friction of drum brake shoe and brake drum, brake shoe and have since the efficiency should be. The traditional research methods based on the force analysis of drum brake or finite element analysis was carried out on the stress components, respectively. But because of brake in braking process of deformation is nonlinear, it is difficult to accurately calculate the change in classical mechanics formula. Two-dimensional plane model can’t reflect the actual working condition of the brake, this paper adopts three-dimensional entity modeling and finite element method (fem) simulation analysis of drum brake working state, using soft body contact model overcame the rigid contact problem of brake shoe and brake drum.This paper analyzes the domestic and foreign research status of drum brake, drum brake is introduced the working principle, structure and the choice of main components. Drum brake with heavy card as the research object, carries on the finite element modeling and analysis.Through the three-dimensional modeling software ABAQUS to establish the brake drum, brake shoe, three-dimensional entity model of friction lining, and then import it into a large finite element analysis software ABAQUS, the simulation analysis was carried out on the state of the brake drum brake, the brake drum, brake shoe and lining stress distribution and displacement distribution of brake braking efficiency are analyzed. For brake structure for structure optimization, this paper discusses drum brake in different brake shoe specifications and brake pressure under the condition of brake, brake drum the distribution of thermal stress and temperature change rule, carries on the finite element analysis, for the drum brake design and manufacture of provides the certain theory basis.