Q4 Two steel springs attached together in series as shown in Fig. P4-11 support a load P. The upper spring has 15 turns of 20-mm diameter wire with a mean radius of 100 The lower spring consists of 12 turns of 15-mm diameter wire on a mean radius of 75 mm. If the maximum allowable shearing stress is 120 MPa, determine the maximum value of P and the total elongation of the springs. Use Eq.(3-10) mm. and G = 83 GPA-

Structural Analysis
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Chapter2: Loads On Structures
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Q4 Two steel springs attached together in series as
shown in Fig. P4-11 support a load P. The upper spring has
15 turns of 20-mm diameter wire with a mean radius of 100
mm. The lower spring consists of 12 turns of 15-mm diameter
wire on a mean radius of 75 mm. If the maximum allowable
shearing stress is 120 MPa, determine the maximum value of
P and the total elongation of the springs. Use Eq-(3-10 )
and G83 GPA.
Fig.P4-11
P = 4 kN
Fig-P4-12
www.
15 mm
Transcribed Image Text:Q4 Two steel springs attached together in series as shown in Fig. P4-11 support a load P. The upper spring has 15 turns of 20-mm diameter wire with a mean radius of 100 mm. The lower spring consists of 12 turns of 15-mm diameter wire on a mean radius of 75 mm. If the maximum allowable shearing stress is 120 MPa, determine the maximum value of P and the total elongation of the springs. Use Eq-(3-10 ) and G83 GPA. Fig.P4-11 P = 4 kN Fig-P4-12 www. 15 mm
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