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The nominal diameter (φ) of rivet (in mm units) using Unwin’s formula is given by which of the following options? Where t is the thickness of the steel plate (in mm unit)

The nominal diameter (φ) of rivet (in mm units) using Unwin’s formula is given by which of the following options? Where t is the thickness of the steel plate (in mm unit) Correct Answer <span class="math-tex">\(\varphi = 6.01\sqrt t \)</span>

Explanation:

  • Practically, after the rivet cooled down, it suffers a certain amount of shrinkage but for uniformity and ease in calculation we consider the rivet Hole to be completely filled by a rivet.
  • The stress distribution is considered uniform in rivet joints.
  • Plate friction is also neglected.

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To calculate the size of the rivet, Unwin’s formula is used.

⇒ ϕ = 6.04√t

Where, t is the thickness of the plate in mm and ϕ is the nominal diameter of rivet in mm

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