Problem 1: A plastic component was subjected to a series of step changes in stress as follows: 1) An initial constant stress of 10 MN/m² was applied for 1000 seconds. 2) Then, the stress level was increased to a constant level of 20 MN/m². 3) After a further 1000 seconds the stress level was decreased to 5 MN/m² which was maintained for 1000 seconds. 4) Then, the stress was increased to 25 MN/m² for 1000 seconds. 5) After that, the stress was completely removed. If the material may be represented by a Kelvin-Voigt model in which the elastic constant E = 1.25 GN/m² and the viscous constant n= 125 GNs/m², calculate the strain 4500 seconds after the first stress was applied.

Problem 1: A plastic component was subjected to a series of step changes in stress as follows: 1) An initial constant stress of 10 MN/m² was applied for 1000 seconds. 2) Then, the stress level was increased to a constant level of 20 MN/m². 3) After a further 1000 seconds the stress level was decreased to 5 MN/m² which was maintained for 1000 seconds. 4) Then, the stress was increased to 25 MN/m² for 1000 seconds. 5) After that, the stress was completely removed. If the material may be represented by a Kelvin-Voigt model in which the elastic constant E = 1.25 GN/m² and the viscous constant n= 125 GNs/m², calculate the strain 4500 seconds after the first stress was applied.

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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