Research on Dynamic Strength and Inertia Effect of Concrete Materials Based on Large-Diameter Split Hopkinson Pressure Bar Test
Abstract
:1. Introduction
2. Research on Strain Rate and Inertia Effect
2.1. Strain Rate Effect Research
2.2. Inertial Effect Research
3. Experimental Research
3.1. Prepare for the Experiment
3.2. SHPB Experimental Instrument
3.3. SHPB Experimental
3.4. Dynamic Uniaxial Strength Criterion
4. Research on Energy Utilization and Fragmentation Morphology
4.1. Energy Utilization Research
4.2. Fragmentation Morphology Research
5. Discussion
6. Conclusions
- (1)
- The macroscopic resistance of concrete material is composed of the actual failure force, axial inertia force, and lateral inertia force. The dynamic growth factor (DIF) model was established. The DIF model comprehensively considers the influence of strain rate on the actual dynamic strength of concrete materials and the influence of strain acceleration on inertial effect.
- (2)
- With the increase of bullet impact velocity, the influence of inertia effect becomes greater and greater. The strain rate effect of concrete is more sensitive than that of mortar, but the inertia effect of mortar is more sensitive than that of concrete.
- (3)
- With the increase of strain rate, the energy utilization of mortar and concrete increases, while the average fragment size decreases. Under the same strain rate, the energy utilization rate, average fragment size, and impact potentiality of mortar are higher than that of concrete.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Sun, B.; Chen, R.; Ping, Y.; Zhu, Z.; Wu, N.; Shi, Z. Research on Dynamic Strength and Inertia Effect of Concrete Materials Based on Large-Diameter Split Hopkinson Pressure Bar Test. Materials 2022, 15, 2995. https://doi.org/10.3390/ma15092995
Sun B, Chen R, Ping Y, Zhu Z, Wu N, Shi Z. Research on Dynamic Strength and Inertia Effect of Concrete Materials Based on Large-Diameter Split Hopkinson Pressure Bar Test. Materials. 2022; 15(9):2995. https://doi.org/10.3390/ma15092995
Chicago/Turabian StyleSun, Bi, Rui Chen, Yang Ping, ZhenDe Zhu, Nan Wu, and Zhenyue Shi. 2022. "Research on Dynamic Strength and Inertia Effect of Concrete Materials Based on Large-Diameter Split Hopkinson Pressure Bar Test" Materials 15, no. 9: 2995. https://doi.org/10.3390/ma15092995