The rnigid bar of weight W= 100 KN is carried by three rods as shown. The mechanism is arranged such that it is symmetrical Refer to the table for the properties of each material Steel Bronze Cooficient of inear expansion 11.7x 10 18x 100 Moculs of Elastoty 200 GPa 83 GPa Area A 500 mm 900 mm Length L 1.00 m 1.60 m
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.
![Question 7 of 20
2 Pa
The nigid bar of weight W= 100 KN, is carried by three rods as shown. The mechanism is arranged such that it is symmetrical. Refer to the table for the properties of each material
Steel
Bronze
Coefficient of linear expansion
11.7x 10
18x 100
Moctulus of Elastioty
200 GPa
83 GPa
Area, A
500 mm
900 mm
Length L
1.00 m
1.60 m
Steel
Steel
Bronze
A.
W](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa5c7e305-5353-4677-b5e2-db8b02826230%2Fcade854a-adcb-4831-a042-c84000057256%2Fcyg6k2b_processed.jpeg&w=3840&q=75)
![C
W
An increase of 80 degree Celsius is made in the whole system. Assume the block remains horizontal after deformations occurred.
Which of the following most nearly gives the stress developed in the bronze bar?
Select the correct response:
73.81 MPa
65.71 MPa
36.51 MPa
132.86 MPa](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa5c7e305-5353-4677-b5e2-db8b02826230%2Fcade854a-adcb-4831-a042-c84000057256%2Fklu6xhy_processed.jpeg&w=3840&q=75)
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