Spring Volume: Solving Intro to Design Problem

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Discussion Overview

The discussion revolves around finding the volume of a spring for an Intro to Design problem. Participants explore various formulas and considerations related to spring design, particularly under static loading conditions.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant initially seeks help to find the volume of a spring, noting that the instructor advised against using the volume of a cylinder method.
  • Another participant provides a formula for the volume of a spring: =(pi*d^2)/(4)*pi*D*Nt, where Nt represents the number of turns.
  • Some participants discuss design goals for springs under static loading, mentioning factors such as spring constant, material considerations, and dimensions.
  • Additional considerations include free height, solid height, working height, and the concern of stress relaxation in static springs.

Areas of Agreement / Disagreement

Participants express agreement on the importance of certain design goals for springs, but there is no consensus on a singular approach to calculating spring volume or the best design practices.

Contextual Notes

The discussion includes various assumptions about the spring's application and design requirements, but these are not fully resolved or defined.

Who May Find This Useful

Students and professionals interested in mechanical design, particularly those focusing on spring mechanics and design considerations for static loading applications.

joeTTU
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For Intro to Design I am working a problem where I need to find the volume of a spring. The instructor hinted that you CANNOT use volume of a cylinder and subtract inner diameter. Please help. Thanks
 
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joeTTU said:
For Intro to Design I am working a problem where I need to find the volume of a spring. The instructor hinted that you CANNOT use volume of a cylinder and subtract inner diameter. Please help. Thanks

What information is given in your problem statement?

CS
 
NVM got it the formula for vol is =(pi*d^2)/(4)*pi*D*Nt

Nt=# of turns
 
joeTTU said:
NVM got it the formula for vol is =(pi*d^2)/(4)*pi*D*Nt

Nt=# of turns

Correct!

CS
 
Let me ask you this though any insight in what you consider design goals for springs with static loading?
 
joeTTU said:
Let me ask you this though any insight in what you consider design goals for springs with static loading?

Well off of the top of my head I would say the spring constant, material (e.g. will it be used in a corrosive environment), and dimensions. Probably some more that I can't think of right now!

CS
 
On top of what Stewartcs mentioned, free height vs. solid height vs. working height are very important. Also, in static springs, stress relaxation is always a concern.
 

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