A plastic material has creep behaviour at 20 oC which can be given by: with J0 = 0.24 GPa-1, J1 = 0.22 GPa-1s-0.4 and n = 0.4 A pipe of this material has a diameter of 7.3 cm, and a wall thickness of 5 mm. The pipe is filled with water and the pressure is increased at a constant rate of 2 kPa.s-1 starting at t = 0 until it reaches 607 kPa. The pressure is then held at 607 kPa. What would the maximum strain in the pipe be 2 hours after the pressure started to increase (when t = 2 hours)? The temperature is 20 oC throughout. Give your answer as a number, with no units to 4 dp (ie don't use standard notation). You have an error margin of 2%.
A plastic material has creep behaviour at 20 oC which can be given by: with J0 = 0.24 GPa-1, J1 = 0.22 GPa-1s-0.4 and n = 0.4 A pipe of this material has a diameter of 7.3 cm, and a wall thickness of 5 mm. The pipe is filled with water and the pressure is increased at a constant rate of 2 kPa.s-1 starting at t = 0 until it reaches 607 kPa. The pressure is then held at 607 kPa. What would the maximum strain in the pipe be 2 hours after the pressure started to increase (when t = 2 hours)? The temperature is 20 oC throughout. Give your answer as a number, with no units to 4 dp (ie don't use standard notation). You have an error margin of 2%.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A plastic material has creep behaviour at 20 oC which can be given by:
with J0 = 0.24 GPa-1, J1 = 0.22 GPa-1s-0.4 and n = 0.4
A pipe of this material has a diameter of 7.3 cm, and a wall thickness of 5 mm.
The pipe is filled with water and the pressure is increased at a constant rate of 2 kPa.s-1 starting at t = 0 until it reaches 607 kPa.
The pressure is then held at 607 kPa.
What would the maximum strain in the pipe be 2 hours after the pressure started to increase (when t = 2 hours)?
The temperature is 20 oC throughout.
Give your answer as a number, with no units to 4 dp (ie don't use standard notation).
You have an error margin of 2%.
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