HEAT+MASS TRANSFER (LL)-W/ACCESS
6th Edition
ISBN: 9781265879631
Author: CENGEL
Publisher: MCG CUSTOM
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1.11 (a) A test piece is cut from a brass
bar and subjected to a tensile test.
With a load of 6.4 kN the test piece, of
diameter 11.28 mm, extends by 0.04
mm over a gauge length of 50 mm.
Determine:
(i) the stress, (ii) the strain, (hi) the
modulus of elasticity.
(b) A spacer is turned from the same
bar. The spacer has a diameter of 28
mm and a length of 250mm. both
measurements being made at 20°C.
The temperature of the spacer is
then increased to 100°C, the natural
expansion
being entirely prevented. Taking the
coefficient of linear expansion to be 18
x 10-6/"C determine:
(i) the stress in the spacer, (ii) the
compressive load on the spacer.
[C.G.] [64MN/m2, 0.0008, 80GN/m2,
115.2 MN/m2, 71 KN.]
10:41
I have attached an image, In that they have mentioned the tolerance of 0.4 for all surfaces. I need to know what's the exact tolerance.
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