Question: 4 - 2 0 . Figure P 4 - 2 0 shows a steel strap with holes and slots punched from it . The entire

4-20. Figure P4-20 shows a steel strap with holes and slots punched from it. The entire strap is also punched from a larger sheet of 3003-HI2 aluminum alloy, 1.40 mm thick. Compute the total force required to produce the part if all shearing is done in one stroke.
6 mm dia. -3 holes
FIGURE P4-20 Steel strap for Problem 4-20.
4 - 2 0 . Figure P 4 - 2 0 shows a steel strap

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