Prob. 2.12-9. (a) Using Figs. P2.12-9 and the definition of extensional strain given in Eq. 2.35, show that the change in length, AL, of a thin wire whose original length is L is given by AL= f(x) dx, where e(x) is the extensional strain of the wire at x. (b) Determine the elongation of a 2-m-long wire if it has a coefficient of thermal expansion a = 20 x 10 °C, and if the change in temperature along the wire is given by AT = 10x² (°C). x (a) Before deformation. L dx(1 + €₂) (b) After deformation. P2.12-9 AL

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Prob. 2.12-9. (a) Using Figs. P2.12-9 and the definition of
extensional strain given in Eq. 2.35, show that the change
in length, AL, of a thin wire whose original length is L is
given by AL= f(x) dx, where e(x) is the extensional
strain of the wire at x. (b) Determine the elongation of a
2-m-long wire if it has a coefficient of thermal expansion
a = 20 x 10 °C, and if the change in temperature along
the wire is given by AT = 10x² (°C).
x
(a) Before deformation.
L
dx(1 + €₂)
(b) After deformation.
P2.12-9
AL
Transcribed Image Text:Prob. 2.12-9. (a) Using Figs. P2.12-9 and the definition of extensional strain given in Eq. 2.35, show that the change in length, AL, of a thin wire whose original length is L is given by AL= f(x) dx, where e(x) is the extensional strain of the wire at x. (b) Determine the elongation of a 2-m-long wire if it has a coefficient of thermal expansion a = 20 x 10 °C, and if the change in temperature along the wire is given by AT = 10x² (°C). x (a) Before deformation. L dx(1 + €₂) (b) After deformation. P2.12-9 AL
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