Whether 2024-T9 aluminum alloy is stronger or weaker than 2024-T6 alloy needs to be determined. Concept introduction: An alloy is a metal formation process by mixing two or more than two metals to combine properties of all those metals by increasing the strength or making its corrosion resistance.

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Question 2 The following strains are obtained by a 0-60-120 strain rosette: ε0 = 300 x 10-6, 60 = 200 x 10-6 and 120= 150 x 10-6. i. Determine strains Ex, Ey and Yxy ii. Determine the strains for 0 = 40° iii. Calculate principal strains, maximum shear strain and the orientation of principal strains iv. Determine normal stresses (σx, σy) and shear stress (Txy), if E = 200kPa and v = 0.25. (Hint: You may use stress-strain relationship for plane strain, summarised in matric format as follows: E σχ бу 1-v v 0 Ex = v 1-v 0 Ey txy. (1+v)(1 − 2v) 0 0 0.5 v

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Chapter 14, Problem 14.7P

Interpretation Introduction

Interpretation:

Whether 2024-T9 aluminum alloy is stronger or weaker than 2024-T6 alloy needs to be determined.

Concept introduction:

An alloy is a metal formation process by mixing two or more than two metals to combine properties of all those metals by increasing the strength or making its corrosion resistance.

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