2. (a)(b)Explain the basis of Paris' Law and discuss with a sketch therelationship between crack growth rate and stress intensity factor andthe limitation in its application.An engine component made of alloy steel is subject to cyclic tensilestress of 310MPa and cyclic compressive stress of 120 MPa duringnormal operation. Prior to the operation, using ultrasonic non-destructive technique, it was found that there is an edge crack oflength 2 mm.Note that under Paris' Law, the crack growth rate (da/dN) is given inthe Appendix, where (da//dN) is in m/cycle, AK = Y(AG) ( a)¹/2, C =2.0 x 10-¹2, n = 3.The material properties of the steel component are as follows:Kic=58MPa (m)¹/2, oy = 560MPa, Y = 1.1.(i)Find the critical crack length.(ii)Determine the fatigue life of this structure based on attaining a criticalsize for fast fracture.

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Explain the basis of Paris' Law and discuss with a sketch the relationship between crack growth rate and stress intensity factor and the limitation in its application.

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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