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Sheet: 4: 1) Two Plates of 7 MM Thick Are Connected by A Triple Riveted Lap Joint of Zig

A triple riveted zigzag lap joint connects two 7 mm thick plates. The question asks to calculate the rivet diameter, pitch, and row spacing and state the failure mode. A double riveted butt joint with cover plates is designed for a boiler shell subjected to 0.95 N/mm^2 steam pressure. Joint efficiency is 75% with allowable stresses of 90 MPa in tension, 140 MPa in compression, and 56 MPa in shear. Design calculations are requested for the longitudinal and circumferential joints of a boiler with 1.6 m diameter under 2.5 N/mm^2 pressure. Working stresses are 75 MPa in tension, 60 MPa in shear, and

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Ben Ahmed
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111 views1 page

Sheet: 4: 1) Two Plates of 7 MM Thick Are Connected by A Triple Riveted Lap Joint of Zig

A triple riveted zigzag lap joint connects two 7 mm thick plates. The question asks to calculate the rivet diameter, pitch, and row spacing and state the failure mode. A double riveted butt joint with cover plates is designed for a boiler shell subjected to 0.95 N/mm^2 steam pressure. Joint efficiency is 75% with allowable stresses of 90 MPa in tension, 140 MPa in compression, and 56 MPa in shear. Design calculations are requested for the longitudinal and circumferential joints of a boiler with 1.6 m diameter under 2.5 N/mm^2 pressure. Working stresses are 75 MPa in tension, 60 MPa in shear, and

Uploaded by

Ben Ahmed
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Sheet: 4

1) Two plates of 7 mm thick are connected by a triple riveted lap joint of zigzag pattern. Calculate the rivet diameter, rivet pitch and distance between
rows of rivets for the joint. Also state the mode of failure of the joint. The
safe working stresses are as follows : t = 90 MPa ; = 60 MPa ; and c =
120 MPa.

2) Design a double riveted butt joint with two cover plates for the longitudinal
seam of a boiler shell 1.5 m in diameter subjected to a steam pressure of 0.95
N/mm2. Assume joint efficiency as 75%, allowable tensile stress in the plate
90 MPa ; compressive stress 140 MPa ; and shear stress in the rivet 56 MPa.
3) A steam boiler is to be designed for a working pressure of 2.5 N/mm2 with
its inside diameter 1.6 m. Give the design calculations for the longitudinal
and circumferential joints for the following working stresses for steel plates
and rivets : In tension = 75 MPa ; In shear = 60 MPa; In crushing = 125
MPa. Draw the joints to a suitable scale.

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