Influence of shear-enhanced compaction and strain-rate effects on the equation of state for concrete-like materials

GAO Chu; KONG Xiangzhen; JIA Yongsheng; WANG Zihao

doi:10.11883/bzycj-2025-0175

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GAO Chu, KONG Xiangzhen, JIA Yongsheng, WANG Zihao. Influence of shear-enhanced compaction and strain-rate effects on the equation of state for concrete-like materials[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0175

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GAO Chu, KONG Xiangzhen, JIA Yongsheng, WANG Zihao. Influence of shear-enhanced compaction and strain-rate effects on the equation of state for concrete-like materials[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0175

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Influence of shear-enhanced compaction and strain-rate effects on the equation of state for concrete-like materials

doi: 10.11883/bzycj-2025-0175

1.
State Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, Hubei, China
2.
State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China
3.
CAS Key Laboratory for Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, Anhui, China

Received Date: 2025-06-12
Rev Recd Date: 2025-11-07

Available Online: 2025-11-13

Abstract

Abstract

To investigate the shear-enhanced compaction effect and strain-rate effect on the equation of state (EoS) of concrete-like materials subjected to blast and impact loadings, high-fidelity numerical simulations were performed based on two types of EoS behavior tests for cement mortar, including hydrostatic compression tests and flyer-plate impact tests. These simulations employed the Kong-Fang hydro-elasto-plastic model for concrete-like materials and were implemented using the smoothed particle Galerkin (SPG) algorithm in LS-DYNA, enabling accurate reproduction of complex dynamic mechanical behaviors, including the shear-enhanced compaction effect and strain-rate effect. Based on the high-fidelity numerical simulations described above, a quantitative analysis was conducted to investigate the influence of the shear-enhanced compaction effect and strain-rate effect on EoS behavior of concrete-like materials, and the challenges associated with eliminating the shear-enhanced compaction and strain-rate coupling effects in flyer-plate impact tests were systematically identified. The results demonstrate that the Kong-Fang model, when combined with the SPG algorithm, can accurately simulate the complex dynamic mechanical behaviors of concrete-like materials, including shear-enhanced compaction effect and strain-rate effect. To achieve high-precision simulation of dynamic mechanical behaviors of concrete-like materials subjected to blast and impact loadings across high-medium-low pressure ranges, it is essential to establish an EoS with a wide-range pressure based on experimental data from EoS behavior tests. However, shear-enhanced compaction and strain-rate coupling effects should be eliminated when using flyer-plate impact test data to calibrate the EoS parameters. A paradox arises in the establishment of EoS with wide-range pressure for concrete-like materials, and the application of numerical iteration correction methodology may represent an effective approach to resolving this challenge. These findings provide a theoretical foundation for the future development of a numerical iteration correction methodology to eliminate the shear-enhanced compaction effect and strain-rate effect on the EoS of concrete-like materials, thereby facilitating the establishment of a high-precision EoS with a wide range of pressure for concrete-like materials subjected to impact and blast loadings.
- concrete-like material,
- blast and impact loadings,
- equation of state,
- shear-enhanced compaction effect,
- strain-rate effect

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References(50)

References

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