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An element is to be subjected to a spectrum of completely reverse stress. It will be cycled at 460 M 29000 cycles. Then the stress will be changed to 440 MPa for 65000 cycles. Finally, the stress will nged to 315 MPa. How many cycles of operation can be expected at this stress level? own that the material has endurance limit of 320 MPa, material constant m = 10,9 and critical num ysles No = 7x10".

An element is to be subjected to a spectrum of completely reverse stress. It will be cycled at 460 M 29000 cycles. Then the stress will be changed to 440 MPa for 65000 cycles. Finally, the stress will nged to 315 MPa. How many cycles of operation can be expected at this stress level? own that the material has endurance limit of 320 MPa, material constant m = 10,9 and critical num ysles No = 7x10".

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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1. An element is to be subjected to a spectrum of completely reverse stress. It will be cycled at 460 MPa for 29000 cycles. Then the stress will be changed to 440 MPa for 65000 cycles. Finally, the stress will be changed to 315 MPa. How many cycles of operation can be expected at this stress level? Known that the material has endurance limit of 320 MPa, material constant m = 10,9 and critical number of cycles No = 7x10". Ans. Infinity
Transcribed Image Text:1. An element is to be subjected to a spectrum of completely reverse stress. It will be cycled at 460 MPa for 29000 cycles. Then the stress will be changed to 440 MPa for 65000 cycles. Finally, the stress will be changed to 315 MPa. How many cycles of operation can be expected at this stress level? Known that the material has endurance limit of 320 MPa, material constant m = 10,9 and critical number of cycles No = 7x10". Ans. Infinity
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