Issue 77

N. A. Alang et al., Fracture and Structural Integrity, 77 (2026) 340-361; DOI: 10.3221/IGF-ESIS.77.20

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(i) (j) Figure 16: von-Mises stress and plastic strain distribution contours of 12% pre-strained specimen at different zones: (a-b) elastic, (c-d) plastic, (e-f) membrane stretching, (g-h) tensile instability and (i-j) fracture. Besides, the specimen also experienced thinning along the contact surface between punch and specimen. Once thinning begins, the cross-sectional area decreases, increasing local stress under constant load. This accelerates plastic deformation and promotes severe strain localization, eventually leading to fracture initiation in the thinnest point. The claim is supported

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