Problem 7 A helical spring is made by wrapping steel wire 12mmp around forming cylinder 100mm in diameter. Compute the number of turns required to permit an elongation of 80mm without exceeding a shearing stress of 140MPA. G = 83GPA.

Problem 7 A helical spring is made by wrapping steel wire 12mmp around forming cylinder 100mm in diameter. Compute the number of turns required to permit an elongation of 80mm without exceeding a shearing stress of 140MPA. G = 83GPA.

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter11: Columns

Section: Chapter Questions

Problem 11.2.4P: Repeat Problem 11.2-3 assuming that R= 10 kN · m/rad and L = 2 m.

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Concept explainers

Design of Shafts and Shaft Components

The shaft is basically defined as the machine element that rotates, is in circular cross-section, it is majorly used to transfer the power from one part of the system to another, or from a power generating machine to a power absorbing machine. The shaft is supported on bearings and is rotated with the help of a set of gears or pulleys that are used for the power transmission. Bending moment, torsion, and an axial force act upon the shaft. Designing of shaft primarily involves determining stresses at a critical point in the shaft that is arising due to loading.

Question

Problem 7
A helical spring is made by wrapping steel wire 12mmø
around forming cylinder 100mm in diameter. Compute
the number of turns required to permit an elongation
of 80mm without exceeding a shearing stress of
140MPA. G = 83GPA.

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