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

<div>Simplified model of true stress-strain curve of the flat region: (a) features of true stress-strain curves of the flat region; (b) trilinear constitutive model with two-stage strain hardening for the flat region.</div>

Advances in Civil Engineering

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Figure 14

Figure 14: Investigation on True Stress-Strain Curves of Flat and Corner Regions of Cold-Formed Section Using 3D Digital Image Correlation Method 