Answer to Question #137240 in Mechanical Engineering for Sudip

Question #137240
Design a socket and spigot type cotter joint to withstand a reciprocating load of 50 kN.
Material: MS; Allowable tensile stress = 80 N/mm2
; Allowable compressive stress = 100
N/mm2
;Allowable shear stress = 50 N/mm2
.
1
Expert's answer
2020-10-08T15:11:10-0400

Load=50 kN, shear stress= =50 , Allowable tensile stress= 80

Allowable compressive load =

(i) For Diameter of rod



so we take dia as 30 mm

Failure of spigot in tension

d=34.179 mm so we take dia as 35 mm

(ii) Failure of spigot end in shear

a=14.285 mm

Failure of spigot collar in shear

9.09 mm

(iii) Failure of socket in tension

P=

on solving this quadratic we get

d1=39.44 so we take diameter as 40 mm




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