Reg No.:_

C192011 Pages:3

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

THIRD SEMESTER B.TECH DEGREE EXAMINATION(R&S), DECEMBER 2019

Course Code: ME201

Course Name: MECHANICS OF SOLIDS (ME, MP, MA, MT, AU, PE, SF)

Max. Marks: 100 Duration: 3 Hours

b)

Alumnium

PARTA
Answer any three full questions, each carries 10marks Marks

A bar 460 mm long is of diameter 25 mm for an initial length of 200 mm ೩೫6 (10)
40 mm diameter for the remaining length. Find the stresses produced in the
individual sections for an applied load of 20 KN and the total elongation. Take

E as 200 GPa.

Define isotropic and orthotropic material? (3)
Figure shows an aluminium bar of 700 mm length and of 1250 mm? cross (7)
sectional area suspended from the ceiling so that its clearance is 0.5 mm
between it and a steel bar of 250 mm length and of 2500 mm’ cross sectional

area. Find the stress in the two bars when 500 KN of load is applied at 500 mm

from the ceiling, Ea=70 GPa and Es=210 GPa.

|

“| | | m

A brass rod 30 mm diameter is enclosed in a steel tube of 50 mm external (10)
diameter and 30 mm internal diameter is initially kept at room temperature of
28°C. The ends of rod and tube which are of length 1.6 m are fastened. Find the

stresses developed in both the materials when the temperature is raised to

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