At an axial load of 25 kN, a 45-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.9 mm while the bar width contracts 0.19 mm. The bar is 220 mm long. At the 25-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 i GPa mm

At an axial load of 25 kN, a 45-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.9 mm while the bar width contracts 0.19 mm. The bar is 220 mm long. At the 25-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 i GPa mm

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter6: Introduction To Mechanical Properties

Section: Chapter Questions

Problem 6.4P

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