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

Figure 8

Measurement of engineering stress-strain curves: (a) diagram of initial section area measurement of flat coupon; (b) engineering stress-strain curves of flat coupons; (c) diagram of initial section area measurement of corner coupon; (d) engineering stress-strain curves of corner coupons.

(a)

(b)

(c)

(d)