Effect of Multiple Springs with Different Spring Constants on Plate Compression

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Discussion Overview

The discussion revolves around the effects of attaching two helical springs with different spring constants to metal plates and the implications of applying compressive stress on one of the plates. It explores how the differences in spring constants influence the compression behavior of the springs and the resulting movement of the plate.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions whether both springs will compress the same under compressive stress, given their different spring constants.
  • Another participant notes that the point of force application affects compression, suggesting that even identical springs would compress differently if the force is not applied centrally.
  • A subsequent reply clarifies that the force is equally distributed across the plate surface, prompting a reevaluation of the scenario.
  • It is proposed that if the plate is allowed to tilt, the same compression could lead to different forces on each spring, potentially causing torque and tilting of the plate.
  • A participant reinforces the idea by comparing the situation to standing on two different springs, indicating that the presence of the plate does not alter the fundamental behavior of the springs.

Areas of Agreement / Disagreement

Participants generally agree that the distribution of force and the differences in spring constants will affect the compression and movement of the plate, but there is no consensus on the exact outcomes or implications of these factors.

Contextual Notes

Assumptions about the uniformity of force distribution and the conditions under which the plate may tilt are acknowledged but not fully resolved.

blumist
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If i were to attach 2 helical springs (of same uncompressed length but different Spring constants) to metal plates on both ends and then apply a compressive stress on one of the plates, will both the springs compress the same? even though they hold a different tendency for compression?
And also, in what way does the difference in the 2 spring constants affect the movement of the plate?

Assume 1 plate to be fixed.
 
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hi blumist! :smile:

depends on where you apply the force …

even with identical springs, if you don't apply the force in the centre, the compressions will be different :wink:
 
uh oh... this was one of those times when u assume that the listener ( or reader in this case ) knows what u r thinking... :redface:
I forgot to mention... the force is equally distributed throughout the plate surface... What would happen for this case?
 
In that case, the plate will tilt if allowed to tilt. Same compression would result in different amounts of force. That would result in torque on the plate, and if unbalanced, that will cause the plate to tilt.
 
yup! :smile:

same as if you stood on two different springs … the presence of the plate makes no difference! :wink:
 

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