B C1107 Pages 3

Reg No.: Name:

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

Course Code: CE201
Course Name: MECHANICS OF SOLIDS

Max. Marks: 100 Duration: 3 Hours

PARTA
Answer any two full questions, each carries 15 marks. Marks

1 ച Define Bulk modulus. Calculate the change in volume of a cubical block of (5)

side 120 mm subjected to a hydrostatic pressure of 70 MPa. Take Poisson’s

ratio 0.28 and young’s modulus 200 GPa.

b) A steel rod 2 m long and 3 mm in diameter is extended by 0.75 mm whena_ (10)

weight W is suspended from the wire. If the same weight is suspended from a

brass wire, 2.5 m long and 2 mm in diameter, it is elongated by 4.64 mm.

Determine the modulus of elasticity of brass if that of steel be 2 x 10° N/mm’.

2 2) State and explain principle of superposition. (5)

b) Calculate the total deformation of the bar shown in 118.1 What will be the (10)
diameter of a bar of uniform cross section, to have the same strain as that of the

stepped bar? Take Young’s modulus as 200 GPa.
6, =25mm

2 = 15mm

‎മം P=25kN‏ م

‏ہے ‎mm‏ 400 ےم ‎mm ವಾ 400 mm‏ 400 مهم

‎Fig.1
‎3 ച The composite bar shown in fig.2 is rigidly fixed at the ends A and B. (10)

‎Determine the reaction developed at ends when the temperature is raised by
25%. Given Eu =140 kN/mm? , Es =200 kN/mm?, ಊ = 17.5×104/0۴, as =

‎1210/00
‎2 2
۸ ‏کم‎ 600 mm A, = 400 mm
‏مم‎ ۹. m—>}4——-_ 3.0 ಗಣ
Fig.2
b) Define the terms 1) Resilience 11) Proof resilience iii) Modulus of resilience (5)

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