Essentials of Materials Science and Engineering, SI Edition
Essentials of Materials Science and Engineering, SI Edition
4th Edition
ISBN: 9781337672078
Author: ASKELAND, Donald R., WRIGHT, Wendelin J.
Publisher: Cengage Learning
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Chapter 7, Problem 7.39P
Interpretation Introduction

Interpretation:

The given figure is obtained from an acrylic polymer having critical fracture toughness of 2MPam stress range is of between 210MPa and 110MPa. The growth rate of a surface crack needs to be determined, if it reaches a length of 5×10-6m and f=1.0.

Concept introduction:

Stress intensity factor equation is as follows:

Δk=f(σmaxσmin)πa

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An American Standard Channel shape must resist a factored tensile load. The length is 15 ft, and there will be two lines of 7/8-in. diameter bolts in the web, as shown in the figure below. Estimate the shear lag factor U to be 0.85. (In a practical design, once the member and bolt layout are selected, the value of U could be computed and the member design could be revised if necessary.) Use A36 steel. For the steel Fy = 36 ksi and F₁ = 58 ksi. Try the tension members given in the table below. Tension member A, (in.²) tw (in.) ry (in.) C10 x 20 5.87 0.379 0.690 C3 × 6 1.76 0.356 0.413 C6 × 8.2 2.39 0.200 0.536 C5 × 9 2.64 0.325 0.486 Bolt lines Select an American Standard Channel shape to resist a factored tensile load of 120 kips. A) C10 × 20 B) C3 × 6 C) C6 x 8.2 D) C5 x 9 -Select- V What is the required gross area? (Express your answer to three significant figures.) Ag = in.2 What is the required effective area? (Express your answer to three significant figures.) Ae = in.2 What is…
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