Numerical investigation on dynamic tensile fracture in concrete material by non-ordinary state-based peridynamics

LIU Zhenhua; KONG Xiangzhen; HONG Jian; FANG Qin

doi:10.11883/bzycj-2024-0485

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LIU Zhenhua, KONG Xiangzhen, HONG Jian, FANG Qin. Numerical investigation on dynamic tensile fracture in concrete material by non-ordinary state-based peridynamics[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0485

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LIU Zhenhua, KONG Xiangzhen, HONG Jian, FANG Qin. Numerical investigation on dynamic tensile fracture in concrete material by non-ordinary state-based peridynamics[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0485

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Numerical investigation on dynamic tensile fracture in concrete material by non-ordinary state-based peridynamics

doi: 10.11883/bzycj-2024-0485

State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

Received Date: 2024-12-11
Rev Recd Date: 2025-02-17

Available Online: 2025-02-18

Abstract

Abstract

To accurately predict the dynamic tensile fracture in concrete materials subjected to impact and blast loadings, this study first establishes a modified Monaghan artificial bulk viscosity computation method within the framework of a non-ordinary state-based peridynamics (NOSB-PD) theory to eliminate numerical oscillations. Subsequently, the corrected strain-rate computation method, previously developed, is integrated into the Kong-Fang concrete material model, which was proposed earlier by the research group to calculate accurately the strain-rate effect during sudden changes. Based on the two methods above, numerical simulations of elastic wave propagation in a one-dimensional rod are conducted, and the results demonstrate that the additional inclusion of the modified Monaghan artificial bulk viscosity force vector state into the original force vector state can effectively suppress the non-physical numerical oscillations caused by the deformation gradient approximation. The superiority of the modified Monaghan artificial bulk viscosity is validated through comparative analysis with the original Monaghan artificial bulk viscosity. Furthermore, the influence of the modified Monaghan artificial bulk viscosity parameters is investigated, and recommended values for these parameters are provided. Finally, the aforementioned model is used to numerically simulate the spall test in concrete specimens, where the effects of including or excluding the modified Monaghan artificial bulk viscosity and different strain-rate computation methods on the prediction results of dynamic tensile fracture are compared and analyzed. The numerical simulation results demonstrate that accurately predicting the dynamic tensile fracture in concrete materials requires simultaneous consideration of the modified Monaghan artificial bulk viscosity and corrected strain-rate computation. The established non-ordinary state-based peridynamics model that accounts for both the modified Monaghan artificial bulk viscosity and corrected strain-rate computation demonstrates strong capabilities in predicting crack locations and quantities based on both qualitative and quantitative analysis metrics. This work provides new insights into the numerical simulation of dynamic tensile fracture in concrete materials under impact and blast loadings.
- Dynamic tensile fracture,
- Modified Monaghan artificial bulk viscosity,
- Corrected strain-rate,
- Non-ordinary state-based peridynamics

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References(39)

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