Influence of friction on the dynamic increase factor of concrete compressive strength in a split Hopkinson pressure bar test

Kim, Kyoung-Min; Lee, Sangho; Cho, Jae-Yeol

doi:10.1016/j.cemconcomp.2022.104517

Cited by 21 publications

(3 citation statements)

References 24 publications

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“…Therefore, the strain rate corresponding to the peak stress was used as the loading strain rate in this study. 46 Test results revealed that the peak strain rates corresponding to the three repeated impact pressures were (65 ± 5)/s, (48 ± 6)/s, and (33 ± 7)/s. As the peak strain rate increased, the repeated impact numbers for UHPFRC specimen failure decreased.…”

Section: Strain Rate Versus Impact Numbermentioning

confidence: 96%

“…However, maintaining a constant strain rate during dynamic loading of brittle materials presents a huge challenge. Therefore, the strain rate corresponding to the peak stress was used as the loading strain rate in this study 46 . Test results revealed that the peak strain rates corresponding to the three repeated impact pressures were (65 ± 5)/s, (48 ± 6)/s, and (33 ± 7)/s.…”

Section: Dynamic Characteristicsmentioning

confidence: 99%

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A novel damage evaluation method for ultra‐high‐performance fiber reinforced concrete under multiple impact loads

Shi,

Chen,

Ning

et al. 2023

Fatigue Fract Eng Mat Struct

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In this study, repeated compression tests were conducted for ultra‐high‐performance fiber reinforced concrete (UHPFRC) under three different impact pressures. Results showed that as the impact number increased, the strain rate approximately showed a proportional increase, and the plateau region of the dynamic stress–strain curve became more prominent. Besides, when the repeated impacts increased, the maximum strain and dynamic toughness both exhibited upward trends, while the peak stress decreased. The average toughness was positively correlated with the strain rate. Additionally, under high repeated impact loads, a single crack propagated rapidly within the UHPFRC specimen after single impact. Conversely, cracks propagated from the center to the periphery on the surface of the specimen when repeated loads were low. Furthermore, a quantitative evaluation method for the damage of UHPFRC under repeated impact loads was proposed based on the characteristic parameters of the gray‐level co‐occurrence matrix (GLCM).

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Section: Strain Rate Versus Impact Numbermentioning

confidence: 96%

Section: Dynamic Characteristicsmentioning

confidence: 99%

A novel damage evaluation method for ultra‐high‐performance fiber reinforced concrete under multiple impact loads

Shi,

Chen,

Ning

et al. 2023

Fatigue Fract Eng Mat Struct

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“…To avoid cracking and destabilisation damage to the conical slope of the bridge abutment, the mortar-rubble structure needs to have adequate impact resistance. Currently, the study of damage to concrete materials under impact loading is an issue of concern [2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Dynamic Fracture Characteristics of Mortar–Rock Interface Zones with Different Interface Inclinations and Shapes

Dong

Jiang

et al. 2023

Materials

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There has been little research on the impact resistance of mortar–rock slope protection structures. To ensure that the mortar–rock interface has good adhesion properties under the action of impact loading, in this paper, based on fracture mechanics theory, a theoretical impact model was established for mortar–rock binary material. Dynamic fracture tests were carried out on mortar–rock interfaces using the split-Hopkinson pressure bar (SHPB) system. The Brazilian disc (CSTBD) specimen was prepared with one half in granite and the other half in mortar. The specimen used for the dynamic impact test was 48 mm in diameter and 25 mm thick. The effects caused by the change in interface inclination and interface shape on the dynamic fracture mode were discussed. The dynamic model parameters were obtained for different inclination angles and interfaces. The results show that both the interface inclination and interface shape have significant effects on the dynamic mechanical properties of the mortar–rock binary material. The fracture modes of the mortar–rock specimens can be classified into three types. When the interface inclination is 0°, the specimen shows shear damage with an interface fracture; when the interface inclination is in the range of 0–90°, the dynamic splitting strength of the mortar–rock material increases with increasing interface inclination, and the interface undergoes composite fracture; and when the interface inclination is 90°, the dynamic splitting strength of the specimen reaches its peak, and the interface undergoes tensile fracture. The mortar–rock interface damage follows the M-C criterion. The roughness of the interface shape has a large influence on the dynamic splitting strength of the specimens. The rougher the interface shape, the higher the interface cleavage strength and the higher the peak load that causes the material to damage. The results of this study can provide a reference for the design of mortar–rubble structures to meet the demand for impact resistance and have strong engineering application value.

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Specific Energy Absorbed by Fiber-Reinforced Concrete Under Static and Dynamic Loading

Savin,

Sharipov

2024

Lecture Notes in Civil Engineering

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Influence of friction on the dynamic increase factor of concrete compressive strength in a split Hopkinson pressure bar test

Cited by 21 publications

References 24 publications

A novel damage evaluation method for ultra‐high‐performance fiber reinforced concrete under multiple impact loads

A novel damage evaluation method for ultra‐high‐performance fiber reinforced concrete under multiple impact loads

Experimental Study on the Dynamic Fracture Characteristics of Mortar–Rock Interface Zones with Different Interface Inclinations and Shapes

Specific Energy Absorbed by Fiber-Reinforced Concrete Under Static and Dynamic Loading

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