The lap joint is fastened with four ¾-inch diameter rivets. a. If the allowable shearing stress of the rivets is 14 ksi (kips per square inch), find the value of P (kips) that maybe applied to the joint. Assume that the load is equally distributed among the rivets. b. if the allowable bearing stress for the plates is 18 ksi, find the value of the load P (kips) that maybe applied to the joint. Assume that the load is equally distributed among the rivets. c. what is the maximum value of the load P (kips) that can be applied to the joint?
Design Against Fluctuating Loads
Machine elements are subjected to varieties of loads, some components are subjected to static loads, while some machine components are subjected to fluctuating loads, whose load magnitude tends to fluctuate. The components of a machine, when rotating at a high speed, are subjected to a high degree of load, which fluctuates from a high value to a low value. For the machine elements under the action of static loads, static failure theories are applied to know the safe and hazardous working conditions and regions. However, most of the machine elements are subjected to variable or fluctuating stresses, due to the nature of load that fluctuates from high magnitude to low magnitude. Also, the nature of the loads is repetitive. For instance, shafts, bearings, cams and followers, and so on.
Design Against Fluctuating Load
Stress is defined as force per unit area. When there is localization of huge stresses in mechanical components, due to irregularities present in components and sudden changes in cross-section is known as stress concentration. For example, groves, keyways, screw threads, oil holes, splines etc. are irregularities.
The lap joint is fastened with four ¾-inch diameter rivets.
a. If the allowable shearing stress of the rivets is 14 ksi (kips per square inch), find the value of P (kips) that maybe applied to the joint. Assume that the load is equally distributed among the rivets.
b. if the allowable bearing stress for the plates is 18 ksi, find the value of the load P (kips) that maybe applied to the joint. Assume that the load is equally distributed among the rivets.
c. what is the maximum value of the load P (kips) that can be applied to the joint?
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