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me180_hw09

me180_hw09 - HOMEWORK 9 VEHICLE BRACKET ANALYSIS IN COMSOL...

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HOMEWORK 9: VEHICLE BRACKET ANALYSIS IN COMSOL Please read the entire assignment before you start generating the model, this will help you plan each step of the process. Consider a hanger bracket used to support an exhaust pipe that is directly after a catalytic converter. A dimensioned schematic of the bracket is shown below. The bracket is 40mm wide, and extends out the page. The drawing plane is the x-y plane, and the extrusion is in the z-direction. (Hint: this is how you should generate the geometry and mesh) 30 mm 5 mm r = 15 mm r = 20 mm 10 mm r = 10 mm r = 15 mm The material properties for AISI-302 stainless steel, which is used to make the bracket, are given below: Young’s modulus, E = 195 × 10 9 Pa Poisson ratio, ν = 0 . 30 Coefficient of thermal expansion, α = 17 × 10 - 6 1 /K 1

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Thermal conductivity, k = 17 W/ ( mK ) The bracket is mounted to the frame of the vehicle, near the engine block, and supports a pipe in the curved u-section. Heat is transmitted to the bracket through the frame and contact with the pipe. The pipe will oscillate
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