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Wrinkling is caused due to _______

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in Engineering Material & Metallurgy by (773k points)
Wrinkling is caused due to _______

(a) Compressive stress

(b) Tensile stress

(c) Improper clearance

(d) Excessive deformation

This question was posed to me during an internship interview.

This question is from Defects and Machining of Metals, Solidification of Metals topic in division Mechanical Working Processes & Phase Transformations of Engineering Material & Metallurgy

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Right choice is (a) Compressive stress

To explain I would say: Wrinkling is a sheet metal defect caused due to buckling under compressive stresses. It may also occur between a punch and a blank holder.

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