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A steel component is subjected to alternate cyclical loading. The steel follows Basquin's law for high cycle fatigue, o, x Nº = C, (where the stress amplitude is in MPa). Ignore the geometric detail and assume that Marin's modifying factors are all equal to 1. You are given the minimum stress amin = -213 MPa, the maximum stress omax = 213 MPa. The material data are Tensile strength oUTS = 539 MPa, Basquin's constant c, = 875 MPa, Basquin's exponent a = 0.085. a) Calculate the stress ratio R, the stress amplitude o, in MPa and the mean stress am in MPa. The answers are acceptable with a tolerance of 0.01 for R and of 1 MPa the stresses. R: MPa MPa b) Calculate the corresponding life, in 10° cycles, (tolerance of 0.1

A steel component is subjected to alternate cyclical loading. The steel follows Basquin's law for high cycle fatigue, o, x Nº = C, (where the stress amplitude is in MPa). Ignore the geometric detail and assume that Marin's modifying factors are all equal to 1. You are given the minimum stress amin = -213 MPa, the maximum stress omax = 213 MPa. The material data are Tensile strength oUTS = 539 MPa, Basquin's constant c, = 875 MPa, Basquin's exponent a = 0.085. a) Calculate the stress ratio R, the stress amplitude o, in MPa and the mean stress am in MPa. The answers are acceptable with a tolerance of 0.01 for R and of 1 MPa the stresses. R: MPa MPa b) Calculate the corresponding life, in 10° cycles, (tolerance of 0.1

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
Problem 1.1MA
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Do part b,c,d

b) Calculate the corresponding life, in 10° cycles, (tolerance of 0.1 106 cycles) N : In practice, the load is not purely alternate, and the minimum stress is omin =-132 MPa, the maximum stress is omax = 294 MPa. c) Calculate the new stress ratio R, the stress amplitude o, in MPa and the mean stress o, in MPa. The answers are acceptable with a tolerance of 1 MPa for stresses. R: MPa MPi d) Calculate the corresponding life, in 10 cycles, (tolerance of 0.1 106 cycles) N :
Transcribed Image Text:b) Calculate the corresponding life, in 10° cycles, (tolerance of 0.1 106 cycles) N : In practice, the load is not purely alternate, and the minimum stress is omin =-132 MPa, the maximum stress is omax = 294 MPa. c) Calculate the new stress ratio R, the stress amplitude o, in MPa and the mean stress o, in MPa. The answers are acceptable with a tolerance of 1 MPa for stresses. R: MPa MPi d) Calculate the corresponding life, in 10 cycles, (tolerance of 0.1 106 cycles) N :
A steel component is subjected to alternate cyclical loading. The steel follows Basquin's law for high cycle fatigue, o, x N = C, (where the stress amplitude is in MPa). Ignore the geometric detail and assume that Marin's modifying factors are all equal to 1. You are given the minimum stress ain = -213 MPa, the maximum stress omax = 213 MPa. The material data are Tensile strength oUTS = 539 MPa, Basquin's constant c, = 875 MPa, Basquin's exponent a = 0.085. a) Calculate the stress ratio R, the stress amplitude o, in MPa and the mean stress am in MPa. The answers are acceptable with a tolerance of 0.01 for R and of 1 MPa the stresses. R: MPa MPа b) Calculate the corresponding life, in 10° cycles, (tolerance of 0.1 106 cycles) N :
Transcribed Image Text:A steel component is subjected to alternate cyclical loading. The steel follows Basquin's law for high cycle fatigue, o, x N = C, (where the stress amplitude is in MPa). Ignore the geometric detail and assume that Marin's modifying factors are all equal to 1. You are given the minimum stress ain = -213 MPa, the maximum stress omax = 213 MPa. The material data are Tensile strength oUTS = 539 MPa, Basquin's constant c, = 875 MPa, Basquin's exponent a = 0.085. a) Calculate the stress ratio R, the stress amplitude o, in MPa and the mean stress am in MPa. The answers are acceptable with a tolerance of 0.01 for R and of 1 MPa the stresses. R: MPa MPа b) Calculate the corresponding life, in 10° cycles, (tolerance of 0.1 106 cycles) N :
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