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Fatigue Life Prediction of Heavy Duty Automobile’s Brake Drum through Coupled Thermo-Mechanical Analysis

机译:通过耦合热力学分析,重型汽车制动鼓的疲劳寿命预测

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The aim of this paper is to demonstrate the methodology to simulate the induced stresses/strains due to thermo-mechanical loading of automobile brake drum. The brake drum undergoes mechanical load due to applied brake pressure and thermal load due to friction generated between brake pad and brake drum while brake is applied. This coupled thermo-mechanical loading affects the life of the brake drum as the stiffness of the brake drum is reduced. The conventional method of simulating this problem is done using Lagrangian discretization in which the load is applied and inertia effect due to angular velocity is applied to a drum at static condition. In contrast, in this paper Eulerian discretization is adopted for finite element analysis, in which drum brake model is discretized as spatially dependent that facilitates actual rotation of brake drum with simultaneous application of brake load resulting more precise simulation. A sequentially coupled transient thermo-mechanical analysis is carried out using ABAQUS 6.12 simulation tool to predict the induced stresses/strains and fatigue life of the brake drum.
机译:本文的目的是展示由于汽车制动鼓的热机械负载而模拟诱导应力/菌株的方法。制动鼓由于施加的制动垫和制动鼓在施加时产生的摩擦而导致的机械负荷和热负荷。当制动鼓的刚度降低时,该耦合的热机械负载影响制动鼓的寿命。模拟该问题的传统方法是使用拉格朗日的离散化完成,其中施加负载并且由于角速度而惯性效应以静态条件施加到滚筒上。相反,在本文中采用了欧拉离散化进行有限元分析,其中鼓式制动模型被离散地被离散地被离散地,其便于制动鼓的实际旋转,同时施加制动负荷导致更精确的模拟。使用ABAQUS 6.12仿真工具进行序贯耦合的瞬态热力学分析,以预测制动鼓的诱导应力/菌株和疲劳寿命。

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