Aluminium alloy AA7475 is applied as a high strength aluminium sheet for aerospace. In preparation for its use a number of tests are carried out on sample sheets including analysis of fracture toughness. A central through-thickness crack is introduced in the sheets. The suppliers of the material quote a fracture toughness of 42 MPa m1/2. Dimensions of the sheet are demonstrated in Figure Q3, where Width W = 50 mm and thickness t = 1 mm. A stress of 447 MPa is applied. Calculate the critical crack half length ac. You may assume a value of Y = 1. Answers should be given in metres (without units) to 2 significant figures Stress intensity K = Υσ πα t W 2a Į F Figure Q3 - a plate of width W containing a central through-thickness crack of length 2a

Aluminium alloy AA7475 is applied as a high strength aluminium sheet for aerospace. In preparation for its use a number of tests are carried out on sample sheets including analysis of fracture toughness. A central through-thickness crack is introduced in the sheets. The suppliers of the material quote a fracture toughness of 42 MPa m1/2. Dimensions of the sheet are demonstrated in Figure Q3, where Width W = 50 mm and thickness t = 1 mm. A stress of 447 MPa is applied. Calculate the critical crack half length ac. You may assume a value of Y = 1. Answers should be given in metres (without units) to 2 significant figures Stress intensity K = Υσ πα t W 2a Į F Figure Q3 - a plate of width W containing a central through-thickness crack of length 2a

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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