The stress - strain curve for an ideally plastic material is
A
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B
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C
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D
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Solution
The correct option is C In plastic design the stress-strain curve is bi-linear as shown in figure (a). However, the stress-strain curve for ideal plastic materials is as shown in figure (c). Figure (b) shows stress-strain curve for brittle materials. Figure (d) shows stress-strain curve for ductile materials.