d.N A fatigue crack growth test is being carried out on a large steel plate containing a 2 mm edge crack. The growth of cracks can be well represented by the Paris Law da= A(AK)*, where A is a constant (4= 6.6 × 10-¹³ (MPa) m cycle") and 4K = Kmax-Kin. If the plate is subjected to a fatigue stress for which max 120 MPa and a ratio R = -0.25 (R=Gmin/max) at a frequency of 2 Hz (2 cycles per second), how long will the crack grow to after 10 hours? and K for the edge crack is K = 1.12 o√(na) Note that: da 1 1 (4-4-4 —— a, (A) 2.6 mm (B) 3 mm (C) 7.2 mm (D) 8 mm (E) 10 mm

d.N A fatigue crack growth test is being carried out on a large steel plate containing a 2 mm edge crack. The growth of cracks can be well represented by the Paris Law da= A(AK)*, where A is a constant (4= 6.6 × 10-¹³ (MPa) m cycle") and 4K = Kmax-Kin. If the plate is subjected to a fatigue stress for which max 120 MPa and a ratio R = -0.25 (R=Gmin/max) at a frequency of 2 Hz (2 cycles per second), how long will the crack grow to after 10 hours? and K for the edge crack is K = 1.12 o√(na) Note that: da 1 1 (4-4-4 —— a, (A) 2.6 mm (B) 3 mm (C) 7.2 mm (D) 8 mm (E) 10 mm

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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