You do not need to provide Given, Assume, and Problem Type/Features for this question. You just need to provide Find, Analyses and a Conclusion. Provide an explanation for b) that is clear, concise, correct and well organized. Use at least one diagram (2D or 3D) to make your case as to why one of them will break before the others.
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.
Using the figure from Question 2, imagine the lamp gets heavier and heavier until one of the cables breaks.
If all of the cables have the same tensile strength, a) which one will break first, and b) why will that one
specifically break first? You do not need to provide Given, Assume, and Problem Type/Features for this
question. You just need to provide Find, Analyses and a Conclusion. Provide an explanation for b) that is
clear, concise, correct and well organized. Use at least one diagram (2D or 3D) to make your case as to
why one of them will break before the others. You can use equations/math to support your explanation
as well, if you want, but expressing your answer in words and using logic will be all that is necessary. Your
answer to a) i.e. which one will break first, can be your “Conclusion” to Question 3
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