Page 127 - Analysis and Design of Machine Elements

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Permanent Connections

Nomenclature w rivet spacing or pitch, mm
tensile stress, normal stress, MPa
d diameter of a rivet, mm [ ] allowable tensile stress, MPa
F tensile or transverse load, N bearing stress, MPa
p
F s shear load, N [ ] allowable bearing stress, MPa
p
k leg length, mm shear stress, MPa
[ ] allowable shear stress, MPa
l the length of weld, mm
M moment, N⋅mm Subscripts
m throat length, mm 1,2…i plate number
t plate thickness, mm x, y, z coordinates

5.1 Riveting

5.1.1 Applications, Characteristics and Structure

As permanent joints, riveted joints are widely used in mechanical products like aircraft,
automotive, as well as in the construction of bridges, boilers, buildings, due to simple
structure, moderate strength, small assembly time and low production cost. Particularly,
riveted joints are capable of joining thin components or dissimilar materials. Never-
theless, the increased weight and protruding rivet heads are the obvious disadvantages
associated with riveted joints. With the rapid development of high-strength steel bolts
and the improvement of welding processes, the usage of rivets has shown a sharp decline
in recent decades [1–3].
Riveted joints are a common means of fastening rolled steel plates, sheet metals
and other relatively thin components to form a permanent joint. Figure 5.1 shows
typical riveted joints. In Figure 5.1a, two plates are lap jointed by a row of rivets;
in Figure 5.1b and Figure 5.1c, two plates are butted together with one strap or with top
and bottom straps by two rows of rivets, respectively.

5.1.2 Types of Rivets
A conventional rivet is a short metal pin with a preformed head and a shank to be
formed into a second head after assembly [4]. During assembly, rivet holes are drilled

Analysis and Design of Machine Elements, First Edition. Wei Jiang.
© 2019 John Wiley & Sons Singapore Pte. Ltd. Published 2019 by John Wiley & Sons Singapore Pte. Ltd.
Companion website: www.wiley.com/go/Jiang/analysis_of_machine_elements