Approximate analysis of necklace coalescence

Article Materials Science, Multidisciplinary

A model of void coalescence in columns

M. E. Torki et al.

Summary: Void coalescence in columns (or necklace coalescence) is a mechanism of void link-up in metal alloys and polymers, which has been confirmed through computation and physical observation but received little attention in literature. This study analyzed the phenomenon using limit analysis and homogenization theories, considering a cylindrical unit cell with a finite height cylindrical void under axially symmetric loading. The predictions were compared with other yielding modes and assessed against finite element-based limit analysis.

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS (2023)

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Article Materials Science, Multidisciplinary

Effect of Delamination on Ductile Fracture during the Impact Test in Ultra-Heavy Steel

Hongtao Wang et al.

Summary: This study investigates the effect of delamination on ductile fracture by studying two industrial ship plate steels, one with delamination and the other without, during impact tests at low temperatures. The results show that delamination occurs before the main fracture surface, dividing the stress concentration and avoiding severe stress concentration and grain breakage. Additionally, delamination helps eliminate the formation of a radial zone with a plane strain state while maintaining ductile fracture.

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2022)

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Article Materials Science, Multidisciplinary