Question

12. A copper bar 16mm dia is heated
through 50 Celsius if 50% of its
elongation is prevented find
deformation, take liner expansion
18*10^-6, L=1200mm​

Answer 1

Answer:

Let l

1

be the length of Cu and that of steel be l

2

.

As the difference in their lengths is constant, thus

(l

2

−l

1

)=(l

2

+l

2

α

2

−l

1

−l

2

α

1

)ΔT

l

2

α

2

−l

1

α

1

=0

l

1

l

2

=

α

2

α

1

l

1

l

2

−1=

α

2

α

1

−1

l

1

l

2

−l

1

=

α

2

α

1

−α

2

l

1

10

=

1.2

0.4

l

1

=30cm