Page 106 - Analysis and Design of Machine Elements

Analysis and Design of Machine Elements
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Problems
Review Questions

1 Why is preloading important for a bolted connection? How should one control the
applied preload?

2 Why is loosening prevention important for a bolted connection? Give examples to
describe measures to resist loosening.

3 A rigid coupling uses property class 5.8 ordinary bolted joints to transmit torque
T . Currently, the coupling is required to transmit a higher torque T , but the num-
1 2
ber of bolts and their diameters cannot be changed. Propose three methods for the
coupling to transmit a higher torque T .
2
4 Please discuss the differences and relations between the load carried by a bolt and
the load carried by a multiply bolted joint.

5 How could one improve the static strength and fatigue strength of a bolted connec-
tion?

Objective Questions

1 Two components are to be connected by bolts. One of components is relatively thick
and the connection is disassembled frequently. Which of the following is the best
choice___________?

(a) (b) (c) (d)
Figure P3.1 Illustration for Objective Question 1.