* S. A close-coiled helical spring has stiffness of 10 N/mm. Its length when fully pressed with adjacent coils touching each other is 400 mm. The modulus of rigidity of material f the spring = 80000 N/mm?. () Determine the wire diameter and mean coil diameter, if their ratio is 1/10. (it) f the gap between any two adjacent coils is 2 mm, what maximum load can be applied before the spring becomes solid i.e. adjacent coils touch. (ii) What is the corresponding maximum shear stress in the spring?

* S. A close-coiled helical spring has stiffness of 10 N/mm. Its length when fully pressed with adjacent coils touching each other is 400 mm. The modulus of rigidity of material f the spring = 80000 N/mm?. () Determine the wire diameter and mean coil diameter, if their ratio is 1/10. (it) f the gap between any two adjacent coils is 2 mm, what maximum load can be applied before the spring becomes solid i.e. adjacent coils touch. (ii) What is the corresponding maximum shear stress in the spring?

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

Buckling of columns

The column is described as a vertical member of the structure that carries an axial compressive load, and buckling is a lateral deformation of the column under the application of load.

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-4.8. A close-coiled helical spring has stiffness of 10 N/mm. Its length when fully
pressed with adjacent coils touching each other is 400 mm. The modulus of rigidity of material
f the spring = 80000 N/mm?.
(i) Determine the wire diameter and mean coil diameter, if their ratio is l/10.
(it) If the gap between any two adjacent coils is 2 mm, what maximum load can be applied
before the spring becomes solid i.e. adjacent coils touch.
(ii) What is the corresponding maximum shear stress in the spring?

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