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Which of the following types of force is predominant in the sheet metal forming processes?

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Which of the following types of force is predominant in the sheet metal forming processes?

(a) Shearing force

(b) Compressive force

(c) Tensile force

(d) Indirect compressive force

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This intriguing question comes from Types of Sheet Metal Die topic in portion Types of Die & Metal Forming Processes of Casting-Forming-Welding II

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Correct answer is (c) Tensile force

Easiest explanation: Tensile force is the predominant force in most of the sheet metal forming operations as compared to the bulk forming which basically involves compressive forces. Due to the tensile stresses in the metal sheets, they may experience localized deformation which is further followed by cracking.

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