At an axial load of 24 kN, a 40-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.7 mm while the bar width contracts 0.18 mm. The bar is 180 mm long. At the 24-kN load, the stress in the polymer bar is less than its proportional limit. Determine (a) the modulus of elasticity. (b) Poisson's ratio. (c) the change in the bar thickness. Answers: (a) E= (b) v = (c) Athickness= I Mi Mi GPa mm
At an axial load of 24 kN, a 40-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.7 mm while the bar width contracts 0.18 mm. The bar is 180 mm long. At the 24-kN load, the stress in the polymer bar is less than its proportional limit. Determine (a) the modulus of elasticity. (b) Poisson's ratio. (c) the change in the bar thickness. Answers: (a) E= (b) v = (c) Athickness= I Mi Mi GPa mm
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:At an axial load of 24 kN, a 40-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.7 mm while the bar width contracts 0.18
mm. The bar is 180 mm long. At the 24-kN load, the stress in the polymer bar is less than its proportional limit.
Determine
(a) the modulus of elasticity.
(b) Poisson's ratio.
(c) the change in the bar thickness.
Answers:
(a) E=
(b) v =
(c) Athickness=
Mi
Mi
Mi
GPa
mm
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