The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased ___________________ times ?
Correct answer: A. Two
- A. Two
- B. Four
- C. Six
- D. Eight
Explanation
For a similar riveted joint, the usual Unwin relation gives rivet diameter d proportional to the square root of plate thickness t. Increasing t fourfold therefore increases d by √4 = 2, or two times.
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