Question

If the ratio of the diameter of rivet hole to the pitch of rivets is 0.30, then the tearing efficiency of the joint is:

• A. 70%
• B. 60%
• C. 50%
• D. 30%

Hint:

Use the formula $\eta_t = \left( 1 - \frac{d}{p} \right) \times 100$ to quickly find tearing efficiency when diameter-to-pitch ratio is given.

Answer 1

The Correct Option is A

Tearing efficiency of a riveted joint is defined as the ratio of the net cross-sectional area to the gross area.
It can be expressed as:
\[ \eta_t = \left( 1 - \frac{d}{p} \right) \times 100 \]
Given, $\frac{d}{p} = 0.30$
\[ \eta_t = \left( 1 - 0.30 \right) \times 100 = 0.70 \times 100 = 70% \]