B C1102 Pages 4

Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION(S), MAY 2019

Course Code: ME201 Course Name: MECHANICS OF SOLIDS
(ME,MP,MA,MT,AU,PE,SF)

Max. Marks: 100 Duration: 3 Hours
PARTA

Answer any three full questions, each carries 10marks Marks

1 a) Explain the salient points of a typical stress-strain curve for a mild steel rod (5)

subjected to tension test.

b) Three long parallel wires equal in length and in the same plane are supporting a (5) rigid bar
connected at their bottom, as shown in fig. The middle wire is of steel while the other
two are of brass. All the wires are of 1ണ്‌ cross-sectional area. The rigid bar supports a
UDL as shown in the figure. Determine the forces and elongation of wires. Take Modulus
of elasticity of steel, E; = 200 GN/m? and that of brass Ey = 100 GN/m?.

-८८८८८८८८८८८८८८८८८८८८८८८

3m

2 a) Define strain energy and explain how it is stored in a body? (3) b) A composite bar
made of brass and steel is fixed between two supports as shown (7)
in the figure. If the temperature is increased by 80°C, find the stresses induced in
the steel and brass section assuming (i) the supports do not yield (ii) the supports
yield by 0.15mm. Take E, = 200 GPa, ೫, = 100 GPa, 0७ = 12x10 /°C and a =
19x10° PC.

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