Consider two helical springs with the following characteristics: Spring 1: materialsteel; number of turns- 10 ; mean

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Consider two helical springs with the following characteristics:

Spring 1: material—steel; number of turns- 10 ; mean coil diameter \(-0.3 \mathrm{~m}\); wire diameter\(0.05 \mathrm{~m}\); free length- \(0.4 \mathrm{~m}\); shear modulus- \(80 \times 10^{9} \mathrm{~Pa}\).

Spring 2: material-aluminum; number of turns- 10 ; mean coil diameter- \(0.25 \mathrm{~m}\); wire diameter \(-0.025 \mathrm{~m}\); free length- \(0.4 \mathrm{~m}\); shear modulus \(-24 \times 10^{9} \mathrm{~Pa}\).

Determine the equivalent spring constant when

(a) spring 2 is placed inside spring 1 , and

(b) spring 2 is placed on top of spring 1 .

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Mechanical Vibrations

ISBN: 9780134361925

6th Edition

Authors: Singiresu S Rao

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