The shaft, made of aisi 1040 cd steel, rotates at 1600 rpm and is supported in the rolling bearings at a and b. the applied forces are f1=2500 lbf and f2=1000 lbf. determine the minimum fatigue factor of safety based on achieving infinite life. if infinite life is not predicted, estimate the number of cycles to failure. also check for yielding. (hint: use attached charts to calculate static stress concentration factors kt and kts and dynamic stress concentration factors kf and kfs at steps in shaft.)

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answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.