8-15. The inner ring A has an inner radius r 1 and outer radius r 2 . Before heating, the outer ring B has an inner radius r 3 and an outer radius r 4 , and r 2 7 r 3 . If the outer ring is heated and then fitted over the inner ring, determine the pressure between the two rings when ring B reaches the temperature of the inner ring. The material has a modulus of elasticity of E and a coefficient of thermal expansion of a . | |
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