Investigate the squared-and-ground-ended helical compression spring shown below to see if it is solid-safe. If not, what is the
largest free length to which they can be wound using ns 1.2?
Wire diameter Outside coil diameter Free length Total coils Material
0.148 in 2.12 in 2.5 in 5.75 A227 hard-drawn steel
Wire diameter Outside coil diameter Free length Total coils Material
0.148 in 2.12 in 2.5 in 5.75 A227 hard-drawn steel
1 answer:
Answer:
The spring is solid safe since calculated Ns > given Ns
Explanation:
Given data :
Wire diameter (∝)= 0.148 in
outside coil diameter(OD) = 2.12 in
free length (lo) = 2.5 in
Total coil ( Nt ) = 5.75
material = A227 Hard-drawn steel
attached below is the remaining part of the detailed solution
From Table
A = 140 kpsi.i, m = 0.190
Sut = A /
since given Ns = 1.2 < 1.36 (calculated Ns) hence the spring is solid safe
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Answer:
C) Dependent on the mass flows in and out.
Explanation:
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Take
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=exit mass flow rate
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So mass of control volume
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so above we can say that mass of control volume dependent on inlet and exit mass.