Explanation Given Infromation: Maximum stress = 600 MPa Minimum stress = 200 MPa Crack length = 0.2 mm Geometry factor = 1.0 No. of cycles perminuate = 200 First calculate intensity factor by following equation, Δ k = f ( σ max − σ min ) π a Here, f = Geometry factor = 1.0 σ max = maximum s t r e s s = 600 MPa σ min = minimum s t r e s s = 200 MPa a = Crack length = 0.2 mm Putting the values, Δ k = f ( σ max − σ min ) π a = 1.0 ( 600 − 200 ) π × 0.0002 Δ k = 10.02 M P a m Now, The crack growth rate is given by, d a d N = c ( Δ k ) n ----------------------(1) Here, C and n are constant=1

Essentials Of Materials Science And Engineering

4th Edition

ISBN: 9781337385497

Author: WRIGHT, Wendelin J.

Publisher: Cengage,

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Question

Chapter 7, Problem 7.35P

Interpretation Introduction

Interpretation:

The high-speed steel subjected to tensile stress in between 600 MPa to 200MPa of 200 revolutions per minute. The growth rate of surface crack, when a crack reaches to 0.2 mm in both m/cycle and m/s needs to be determined.

Concept introduction:

The crack growth rate is given by the following relation:

dadN=c(Δk)n

Here,

Δk=Intensity factor da dN=Crack growth rate

The crack growth rate is the ratio of dadN means how much percent the crack or failure of taking place at what limit.

Expert Solution & Answer

Chapter 7 Solutions

Essentials Of Materials Science And Engineering

Ch. 7 - Prob. 7.1P Ch. 7 - Prob. 7.2P Ch. 7 - Prob. 7.3P Ch. 7 - Prob. 7.4P Ch. 7 - Prob. 7.5P Ch. 7 - Prob. 7.6P Ch. 7 - Prob. 7.7P Ch. 7 - Prob. 7.8P Ch. 7 - Prob. 7.9P Ch. 7 - Prob. 7.10P

Ch. 7 - Prob. 7.11P Ch. 7 - Prob. 7.12P Ch. 7 - Prob. 7.13P Ch. 7 - Prob. 7.14P Ch. 7 - Prob. 7.15P Ch. 7 - Prob. 7.16P Ch. 7 - Prob. 7.17P Ch. 7 - Prob. 7.18P Ch. 7 - Prob. 7.19P Ch. 7 - Prob. 7.20P Ch. 7 - Prob. 7.21P Ch. 7 - Prob. 7.22P Ch. 7 - Prob. 7.23P Ch. 7 - Prob. 7.24P Ch. 7 - Prob. 7.25P Ch. 7 - Prob. 7.26P Ch. 7 - Prob. 7.27P Ch. 7 - Prob. 7.28P Ch. 7 - Prob. 7.29P Ch. 7 - Prob. 7.30P Ch. 7 - Prob. 7.31P Ch. 7 - Prob. 7.32P Ch. 7 - Prob. 7.33P Ch. 7 - Prob. 7.34P Ch. 7 - Prob. 7.35P Ch. 7 - Prob. 7.36P Ch. 7 - Prob. 7.37P Ch. 7 - Prob. 7.38P Ch. 7 - Prob. 7.39P Ch. 7 - Prob. 7.40P Ch. 7 - Prob. 7.41P Ch. 7 - Prob. 7.42P Ch. 7 - Prob. 7.43P Ch. 7 - Prob. 7.44P Ch. 7 - Prob. 7.45P Ch. 7 - Prob. 7.46P Ch. 7 - Prob. 7.47P Ch. 7 - Prob. 7.48P Ch. 7 - Prob. 7.49P Ch. 7 - Prob. 7.50P Ch. 7 - Prob. 7.51P Ch. 7 - Prob. 7.52P Ch. 7 - Prob. 7.53P Ch. 7 - Prob. 7.54P Ch. 7 - Prob. 7.55P Ch. 7 - Prob. 7.56P Ch. 7 - Prob. 7.57P Ch. 7 - Prob. 7.58P Ch. 7 - Prob. 7.59P Ch. 7 - Prob. 7.60P Ch. 7 - Prob. 7.61P Ch. 7 - Prob. 7.62P Ch. 7 - Prob. 7.63P Ch. 7 - Prob. 7.64DP Ch. 7 - Prob. 7.65DP Ch. 7 - Prob. 7.66DP Ch. 7 - Prob. 7.67DP Ch. 7 - Prob. K7.1KP

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