b) A company that manufactures flat belt drives is undertaking a review of the material it uses for its belts. It has id

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B A Company That Manufactures Flat Belt Drives Is Undertaking A Review Of The Material It Uses For Its Belts It Has Id 1 (62.97 KiB) Viewed 33 times

b) A company that manufactures flat belt drives is undertaking a review of the material it uses for its belts. It has identified the following two possibilities: Material Polypropylene Hard rubber Density kg/m³ 975 1,250 The coefficients of friction between these two possible belt materials and a steel pulley wheel are: Material - on - Material Polypropylene on steel Hard rubber on steel Coefficient of friction 0.22 0.75 A prospective customer wants to use a flat belt on steel pulleys. The belts will be 25 mm wide and 6 mm thick. The maximum stress in the belt is not to exceed 4.5x105 N/m² and the angle of lap is 180°. The centrifugal effect must be considered in the following design calculations. i. For each of the two possible belt materials, calculate the speed of the belt when it is transmitting maximum power and operating at the maximum allowed stress. [7] ii. For each of the two possible belt materials, calculate the maximum power that can be transmitted for that maximum speed. [10]