Question

For $50\%$ penetration of work material, a punch with single shear equal to thickness will

• A. reduce the punch load to half the value
• B. increase the punch load by half the value
• C. maintain the same punch load
• D. reduce the punch load to quarter load

Answer 1

The correct option is A reduce the punch load to half the value

$F=\frac{F_{max}\times Kt}{S}=\frac{F_{max}\times 0.5t}{t}$
$F=0.5F_{max}$
Hence, punch load reduces by $50$% or half of the value.