A 1-8 UNC low carbon steel bolt (diameter = 1.0 in, 8 threads/in) is currently used %3D for a certain application. It is preloaded to 75% of its proof strength (proof strength is 33,000 lb/in^2). However, this bolt is too large for the size of the components involved, and a higher-strength smaller bolt would be preferable (proof strength is 120,000 lb/in^2). Determine (a) the smallest nominal size of an alloy steel bolt that could be used to achieve the sa ne preload from the following standard UNC sizes used by the company: 1/4-20, 5/16-18, 3/8-16, 1/2-13, 5/8-11, or 3/4-10. (b) Compare the torque required to obtain the preload for the original 1-in bolt and the alloy steel bolt selected in part (a) if the torque coefficient in both cases = 0.20. %3D

A 1-8 UNC low carbon steel bolt (diameter = 1.0 in, 8 threads/in) is currently used %3D for a certain application. It is preloaded to 75% of its proof strength (proof strength is 33,000 lb/in^2). However, this bolt is too large for the size of the components involved, and a higher-strength smaller bolt would be preferable (proof strength is 120,000 lb/in^2). Determine (a) the smallest nominal size of an alloy steel bolt that could be used to achieve the sa ne preload from the following standard UNC sizes used by the company: 1/4-20, 5/16-18, 3/8-16, 1/2-13, 5/8-11, or 3/4-10. (b) Compare the torque required to obtain the preload for the original 1-in bolt and the alloy steel bolt selected in part (a) if the torque coefficient in both cases = 0.20. %3D

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

Fasteners and Design of Non Permanent Joints

Fasteners are described as mechanical components used to join or assemble two or more pieces of materials. The fasteners are used in various machines or structures based on their suitability to produce non-permanent, semi-permanent, and permanent joints.

Question

A 1-8 UNC low carbon steel bolt (diameter = 1.0 in, 8 threads/in) is currently used
%3D
for a certain application. It is preloaded to 75% of its proof strength (proof
strength is 33,O00 lb/in^2). However, this bolt is too large for the size of the
components involved, and a higher-strength smaller bolt would be preferable
(proof strength is 120,000 lb/in^2). Determine (a) the smallest nominal size of an
alloy steel bolt that could be used to achieve the sane preload from the following
standard UNC sizes used by the company: 1/4-20, 5/16-18, 3/8-16, 1/2-13,
5/8-11, or 3/4-10. (b) Compare the torque required to obtain the preload for the
original 1-in bolt and the alloy steel bolt selected in part (a) if the torque
coefficient in both cases = 0.20.
%3D

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