Numerical Study on Impact Damage and Damage Evolution of Cemented Backfill DOI Creative Commons
Qiang Li, Jinshan Sun,

Xianqi Xie

и другие.

Crystals, Год журнала: 2025, Номер 15(6), С. 514 - 514

Опубликована: Май 28, 2025

To quantitatively describe the damage degree and failure process of cemented backfill (CB) under dynamic loading, this paper performed numerical split Hopkinson pressure bar (SHPB) impact experiments on CB samples using ANSYS/LS-DYNA. The pattern with four mix ratios (cement-to-sand (c/s) 1:4, 1:6, 1:8, 1:10) at different velocities (v) (1.5, 1.7, 1.8, 2.0 m/s) were numerically investigated micro-crack density method to define variable (d). results revealed that use a waveform shaper in simulation yielded more ideal rectangular wave ensue uniform stress distribution across sample’s plane without concentration. Numerical simulations effectively depicted CB, overall trend exhibiting edge spalling followed by propagation interconnection internal cracks. When v increased from 1.7 m/s 1.8 m/s, d than 10%. As 1.5 for c/s 1:10 ranged 0.238 0.336, 0.274 0.413, 0.391 0.547, 0.473 0.617, respectively. A significant “leap” phenomenon was observed when ratio changed 1:6 1:8.

Язык: Английский

Numerical Study on Impact Damage and Damage Evolution of Cemented Backfill DOI Creative Commons
Qiang Li, Jinshan Sun,

Xianqi Xie

и другие.

Crystals, Год журнала: 2025, Номер 15(6), С. 514 - 514

Опубликована: Май 28, 2025

To quantitatively describe the damage degree and failure process of cemented backfill (CB) under dynamic loading, this paper performed numerical split Hopkinson pressure bar (SHPB) impact experiments on CB samples using ANSYS/LS-DYNA. The pattern with four mix ratios (cement-to-sand (c/s) 1:4, 1:6, 1:8, 1:10) at different velocities (v) (1.5, 1.7, 1.8, 2.0 m/s) were numerically investigated micro-crack density method to define variable (d). results revealed that use a waveform shaper in simulation yielded more ideal rectangular wave ensue uniform stress distribution across sample’s plane without concentration. Numerical simulations effectively depicted CB, overall trend exhibiting edge spalling followed by propagation interconnection internal cracks. When v increased from 1.7 m/s 1.8 m/s, d than 10%. As 1.5 for c/s 1:10 ranged 0.238 0.336, 0.274 0.413, 0.391 0.547, 0.473 0.617, respectively. A significant “leap” phenomenon was observed when ratio changed 1:6 1:8.

Язык: Английский

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