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<p>In this study, anchored rough-fractured specimens were fabricated using 3D scanning and printing to investigate the effects of fracture scale on their dynamic response and failure mechanisms. Increasing fracture length significantly reduced the dynamic strength and dynamic elastic modulus, whereas anchoring mitigated this deterioration and increased the dissipated energy and energy absorption rate. The DIC results showed that anchoring suppressed strain localization and crack initiation. Specimens with shorter fractures exhibited mixed tensile–shear failure, whereas the specimen with a 40&#xa0;mm fracture developed through-going shear failure along the prefabricated fracture. The bolt axial force increased slowly during crack initiation, rose rapidly during crack propagation, and subsequently decreased after peak loading. At a fracture length of 40&#xa0;mm, the dynamic-strength and dynamic-elastic-modulus enhancement factors (<i>γ</i><sub><i>σ</i></sub>, <i>γ</i><sub><i>E</i></sub>) reached 19.2% and 16.2%, respectively.</p>

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Fracture Scale Effects on the Dynamic Response of Anchored Rough-Fractured Specimens Under SHPB Loading

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Luqing Zhang,
  • Haijian Su,
  • Liyuan Yu,
  • Wenbo Wang,
  • Mingrui Du

摘要

In this study, anchored rough-fractured specimens were fabricated using 3D scanning and printing to investigate the effects of fracture scale on their dynamic response and failure mechanisms. Increasing fracture length significantly reduced the dynamic strength and dynamic elastic modulus, whereas anchoring mitigated this deterioration and increased the dissipated energy and energy absorption rate. The DIC results showed that anchoring suppressed strain localization and crack initiation. Specimens with shorter fractures exhibited mixed tensile–shear failure, whereas the specimen with a 40 mm fracture developed through-going shear failure along the prefabricated fracture. The bolt axial force increased slowly during crack initiation, rose rapidly during crack propagation, and subsequently decreased after peak loading. At a fracture length of 40 mm, the dynamic-strength and dynamic-elastic-modulus enhancement factors (γσ, γE) reached 19.2% and 16.2%, respectively.