(d) A support rod for the landing gear of a private airplane is subjected to a tensile loading landing. The loads are predicted to be as high as 40,000 pounds. Because the rod is crucial and failure could lead to a loss of life, and as a responsible engineer, the rod is to be designed with a factor safety of 4 (that is designed so that the rod is capable of supporting loads for times as great as expected). Operation of the system also produces loads that may induce cracks in the rod. Our non-destructive testing equipment can detect any crack greater than 0.02 in deed. Based on the materials given in Table Q2 (c), design the support Rod and the material, and justify your answer. Table Q2(c): The Plane Strain Fracture Toughness Kcof Selected Materials Yield Strength or Fracture Toughness Ku Ultimate Strength (for Brittle Solids) (psi vin.) Material (psi) 66,000 47,000 130,000 125,000 238,000 206,000 30,000 80,000 60,000 120,000 4,000 8,400 Al-Cu alloy 22,000 33,000 50,000 90,000 45,800 80,000 1,600 4,500 10,000 51,000 900 3,000 Ti-6% Al-4% V Ni-Cr steel SigNa Transformation toughened Zro Si,Na-SIC composite Polymethyl methacrylate polymer Polycarbonate polymer

(d) A support rod for the landing gear of a private airplane is subjected to a tensile loading landing. The loads are predicted to be as high as 40,000 pounds. Because the rod is crucial and failure could lead to a loss of life, and as a responsible engineer, the rod is to be designed with a factor safety of 4 (that is designed so that the rod is capable of supporting loads for times as great as expected). Operation of the system also produces loads that may induce cracks in the rod. Our non-destructive testing equipment can detect any crack greater than 0.02 in deed. Based on the materials given in Table Q2 (c), design the support Rod and the material, and justify your answer. Table Q2(c): The Plane Strain Fracture Toughness Kcof Selected Materials Yield Strength or Fracture Toughness Ku Ultimate Strength (for Brittle Solids) (psi vin.) Material (psi) 66,000 47,000 130,000 125,000 238,000 206,000 30,000 80,000 60,000 120,000 4,000 8,400 Al-Cu alloy 22,000 33,000 50,000 90,000 45,800 80,000 1,600 4,500 10,000 51,000 900 3,000 Ti-6% Al-4% V Ni-Cr steel SigNa Transformation toughened Zro Si,Na-SIC composite Polymethyl methacrylate polymer Polycarbonate polymer

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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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

(d) A support rod for the landing gear of a private airplane is subjected to a tensile loading
landing. The loads are predicted to be as high as 40,000 pounds. Because the rod is
crucial and failure could lead to a loss of life, and as a responsible engineer, the rod
is to be designed with a factor safety of 4 (that is designed so that the rod is
capable of supporting loads for times as great as expected). Operation of the
system also produces loads that may induce cracks in the rod. Our non-destructive
testing equipment can detect any crack greater than 0.02 in deed. Based on the
materials given in Table Q2 (c), design the support Rod and the material, and
justify your answer.
Table Q2(c): The Plane Strain Fracture Toughness Kcof Selected Materials
Fracture Toughness Kie
(psi vin.)
Yield Strength or
Ultimate Strength (for Brittle Solids)
(psi)
Material
66,000
47,000
130,000
125,000
238,000
206,000
30,000
80,000
Al-Cu alloy
22,000
33,000
Ti-6% Al-4% V
50,000
90,000
45,800
Ni-Cr steel
80,000
1,600
4,500
Al>03
SigNa
Transformation toughened Zro2
SizNa-SIC composite
Polymethyl methacrylate polymer
Polycarbonate polymer
10,000
51,000
900
3,000
60,000
120,000
4,000
8,400

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QUESTION 1 A suitable factor of safety to apply when selecting the cable for a factory hoist is: 05 O1.2 0.2 O 25 QUESTION 2 A winch drum of diameter 199mm turning at 14rpm lifts a load of 5.5kN. What is the winch output power? Give your answer in W to 1 decimal place without units eg 102.3 NOT 102345239 W QUESTION 3 The figure below shows two proposed designs of drums to solve the same load and line speed lifting arrangement. What is the biggest advantage with design A: A The torque on the drum shaft will be lower O The rope speed will be lower The bending moment in the drum shaft will be lower O The weight of the drum material will be less 刚 B
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