Rate dependent behavior and modeling of concrete based on SHPB experiments

Al-Salloum, Yousef; Almusallam, Tarek; Ibrahim, Sobhy M.; Abbas, Husain; Alsayed, Saleh H.

doi:10.1016/j.cemconcomp.2014.07.011

Cited by 169 publications

(45 citation statements)

References 29 publications

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“…Moreover, the dynamic compressive strength of fiberreinforced cement soil is notably greater than the static compressive strength under the same polypropylene fiber content. us, all the DIF values in Table 4 are over 1. is could be explained by the situation where the cement soil is approximately under a condition of confining pressure in the SHPB test and the deformation of cement soil was constrained [23,25]. Under the restraining action, the propagation and extension of the microcracks inside cement soil are limited, and the frictional force and bonding force among soil particles have been enhanced significantly [7].…”

Section: Relationship Between Dynamic Strength Increase Factor and Pomentioning

confidence: 99%

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

Pang

Huang

2019

Advances in Materials Science and Engineering

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This paper aims to study the dynamic mechanical properties, failure patterns, fractal behaviors, and energy dissipation of polypropylene fiber-reinforced cement soil under impact loading. Dynamic compression tests for reinforced cement soil with different polypropylene fiber contents of 0%, 0.4%, 0.8%, and 1.2% were conducted using a 50 mm diameter split Hopkinson pressure bar (SHPB) device. The static and dynamic stress-strain curves, dynamic strength increase factor (DIF), fractal behaviors, and energy dissipation properties of polypropylene fiber-reinforced cement soil were investigated and analyzed. The experimental results indicated that the dynamic strength increase factor (DIF) of cement soil increases firstly and then decreases with the increase of polypropylene fiber content from 0% to 1.2%. The maximum dynamic compressive strength of cement soil was obtained with adding 0.8% polypropylene fiber. With the increase of polypropylene fiber content, the average particle size of cement soil fragments has an increasing trend, whereas the fractal dimension presents a decreasing trend. Besides, the fragmentation degree of cement soil decreases correspondingly with the increase of polypropylene fiber content. The fractal dimension value has a linear relationship with the polypropylene fiber content and a decreasing exponential relationship with the average particle size. The absorbed energy per unit volume of cement soil presents an increasing trend firstly and a decreasing trend subsequently as the polypropylene fiber content increases from 0% to 1.2%. When the fractal dimension of cement soil is kept in the range of 2.04 to 2.15, the absorbed energy per unit volume of cement soil increases first and then decreases. The absorbed energy per unit volume of cement soil has a quadratic parabola relationship with polypropylene fiber content and fractal dimension, respectively. At last, the relationship of the absorbed energy per unit volume, fractal dimension, and polypropylene fiber content can be established, which can be used in the studies of dynamic behaviors and fractal properties of the fiber-reinforced cement soil under impact loading.

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Section: Relationship Between Dynamic Strength Increase Factor and Pomentioning

confidence: 99%

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

Pang

Huang

2019

Advances in Materials Science and Engineering

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“…Considering the fact that the existing RC columns may be subjected to not only seismic loading but also dynamic loading such as vehicle/boat impact during their service life [15], the investigations of impact behaviors of RC structures strengthened with FRP composites are of vital importance for the application of FRPs in the impact-resistant design of RC structures. Although extensive studies of impact-resistant behaviors of conventional concrete and RC structures have been conducted [16][17][18][19][20][21], only a few studies of impact-resistant behaviors of FRP-confined concrete were conducted [22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior of PET FRP and Its Preliminary Application in Impact Strengthening of Concrete Columns

et al. 2019

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Polyethylene terephthalate (PET) fiber has attracted significant attention for reinforced concrete (RC) structure rehabilitation due to its large rupture strain (LRS; more than 7%) characteristic and recyclability from waste plastic bottles. This study presents a dynamic tensile test of PET fiber bundles performed using a drop-weight impact system. Results showed that the tensile strength and the elastic modulus of the PET fiber bundles increased, whereas the failure strain and the toughness decreased with the increasing strain rate from 1/600 to 160 s−1. In addition, the performance of concrete confined with the PET fiber-reinforced polymer (FRP) under impact loading was investigated based on a 75 mm-diameter split Hopkinson pressure bar (SHPB) device and a drop-weight apparatus. For the SHPB test, owing to the large rupture strain property of PET FRP, the PET FRP-confined concrete exhibited significantly better performance under impact loading compared to its counterpart confined with carbon FRPs (CFRPs). During the drop-weight test, the confinement of the PET FRP composites to the concrete columns as external jackets not only improved the peak impact force, but also prolonged the impact process.

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“…e strain rate sensitivities are mainly measured by strength or the strains at the maximum stress [41,42]. In recent years, a variety of researchers have investigated and demonstrated the dynamic properties of natural or artificial brittle materials [43][44][45][46][47], and they found that the dynamic strength (including dynamic compressive strength and dynamic tensile strength) and impact toughness increases with strain rate and the strain rate sensitivity of brittle materials.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Crack Propagation and Fracture Behavior of Pre-cracked Specimens under Impact Loading by Split Hopkinson Pressure Bar

Zhao

Zhang

2019

Advances in Materials Science and Engineering

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Deformation and fracture of brittle materials, especially crack propagation, have drawn wide attention in recent years. But dynamic crack propagation under impact loading was not well understood. In this paper, we experimentally tested Brazilian disk (BD) fine sandstone specimens containing pre-cracks under cyclic impact loading by the Φ 74 mm diameter split Hopkinson pressure bar (SHPB) test device. The pre-cracked specimens were named central straight through crack flattened Brazilian disk (CSCFBD). By using the low air-pressure loading conditions (0.1 MPa, equal to the impact velocity of 3.76 m/s), a series of dynamic impact tests were detected successfully, and the effects of pre-cracks on dynamic properties were analyzed. Experimental results show that the multiple cracks mostly initiate at/or near the pre-crack tips and then propagate in different paths and directions varying by inclination angles, leading to the ultimate failure. Compared to static or quasi-static loading, dynamic crack propagation and fracture behavior are obviously different. Furthermore, we characterized the crack propagation paths, directions, and fracture patterns and discussed the influences of the pre-cracks during the breakage process. We concluded that the results obtained are significant in investigating the failure mechanism and mechanical properties of brittle materials under impact loading.

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Rate dependent behavior and modeling of concrete based on SHPB experiments

Cited by 169 publications

References 29 publications

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

Dynamic Behavior of PET FRP and Its Preliminary Application in Impact Strengthening of Concrete Columns

Dynamic Crack Propagation and Fracture Behavior of Pre-cracked Specimens under Impact Loading by Split Hopkinson Pressure Bar

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