Investigation on True Stress-Strain Curves of Flat and Corner Regions of Cold-Formed Section Using 3D Digital Image Correlation Method

Figure 12

Comparison of true and engineering stress-strain curves of flat and corner coupons: (a) true and engineering stress-strain curves of flat coupons; (b) true and engineering stress-strain curves of corner coupons; (c) relationship between true and engineering strains of flat coupons; (d) relationship between true and engineering strains of corner coupons.

(a)

(b)

(c)

(d)