Cyclic tensile behavior of SFRC: Experimental research and analytical model

Li, Biao; Chi, Yin; Xu, Lihua; Li, Changning; Shi, Yuchun

doi:10.1016/j.conbuildmat.2018.09.140

Cited by 45 publications

(17 citation statements)

References 40 publications

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“…The last stage is characterized by a drastic decline in stiffness due to rapid crack propagation leading to failure. The Analysis of the stiffness reduction during loading-unloading monotonic tests is used by several authors [7][8][9] to evaluate the macroscopic damage evolutions of SFRC. During the fatigue test, the dynamic modulus (slope of the stress-strain hysteresis) is commonly used as a damage indicator.…”

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confidence: 99%

Multi‐scale analysis of short glass fiber‐reinforced polypropylene under monotonic and fatigue loading

et al. 2020

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Short fiber-reinforced polypropylene is largely used in the automotive industry. Fatigue failure is one of the most failure modes observed in this class of materials. In order to better understand the damage mechanisms and plasticity evolution, this article provides an overall experimental investigation of the mechanical properties of a PPGF40 composite (polypropylene matrix reinforced by a 40% weight content of short glass fibers) including monotonic and cyclic loading. The effect of various parameters such as the loading direction, the strain rate, the temperature, and the fatigue are analyzed. The evolutions of the loss of stiffness and plastic strain during monotonic and fatigue tests are analyzed. Self-heating during cyclic loading is also studied. Moreover, the coupling effect of damage and plasticity is analyzed by plotting the evolution of the relative loss of stiffness vs the plastic strain increment for monotonic and cyclic loadings. For quasi-static loading, the results emphasize an intrinsic curve independent of the loading direction. Moreover, a sharp increase in the damage and plasticity levels due to the local effect occurring during cyclic loading is observed and correlated to SEM fracture surface analysis.

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confidence: 99%

Multi‐scale analysis of short glass fiber‐reinforced polypropylene under monotonic and fatigue loading

et al. 2020

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“…The obtained stress-strain behavior and mechanical properties can be directly used in the quantitative analysis such as stability assessment and strength-based design of FRCC at field scale. In addition, the failure patterns can be identified by macroscale non-destructive evaluation methods such as ultrasound and digital image correlation (DIC) technique and microstructure observation analysis such as scanning electron microscopy (SEM) and X-ray computed tomography (CT) (Li et al, 2018a;Wu et al, 2019;Cao et al, 2021). To further understand the multiscale geomechanical behaviors of FRCC under dynamic loading conditions, a critical review is presented in the following subsections to provide deep insights into the cyclic tensile, shear, and compressive response of FRCC.…”

Section: Multiscale Geomechanical Behavior Of Fiber-reinforced Cementitious Composites Under Cyclic Loadingsmentioning

confidence: 99%

“…Figure 1 represents a typical stress-strain curve that can be used to explain the damage process of FRCC under cyclic loading conditions. For the pre-peak behavior (path 0B), the material exhibits high elasticity making it difficult to spot the hysteretic loops (Li et al, 2018a). This is because the crack-bridging capacity of the fibers is not activated until the first crack appears; at first-crack stress, the cracks start to propagate in the porous matrix.…”

Section: Cyclic Tensile Behavior Of Fiber-reinforced Cementitious Materialsmentioning

confidence: 99%

“…In addition to the constitutive behavior of FRCC, understanding the bridging behavior and any synergy between these bridging mechanisms in FRCC is vital to determining its crack-restraining capabilities. The acoustic emission (AE) technique, as a non-destructive testing approach, has been widely adopted for the investigation of local damage in FIGURE 2 | Type of cracks generated in the cementitious material under cyclic tensile loading: (A) without fiber reinforcement, and (B) with fiber reinforcement (Li et al, 2018a).…”

Section: Cyclic Tensile Behavior Of Fiber-reinforced Cementitious Materialsmentioning

confidence: 99%

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Multiscale Geomechanical Behavior of Fiber-Reinforced Cementitious Composites Under Cyclic Loading Conditions—A Review

McLean

Cui

2021

Front. Mater.

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As construction materials, cementitious composites such as cemented paste backfill (CPB), cemented soil, and concrete may be subjected to extreme dynamic loadings including impact, blast, and/or seismic loads during their service life. To improve mechanical performance under dynamic loadings, fiber reinforcement technique has been considered a promising approach and extensively used in practice. In this manuscript, a new perspective on the multiscale geomechanical behavior of fiber-reinforced cementitious composites (FRCC) is provided through a comprehensive review on the macroscale constitutive behavior and the associated mechanical properties, and microscale failure processes under cyclic tensile, shear, and compressive loading conditions. For the macroscale mechanical response, this review includes a detailed analysis of the state-of-the-art research in stress-strain behaviors including pre- and post-peak response and hysteretic behaviors. Moreover, the effects of pore water pressure on the dynamic response of soft FRCCs such as CPB are discussed. Furthermore, the link between microscale crack propagation (including the formation of the interfacial transition zone and fracture process zone) and damage accumulation is established for each type of cyclic loading condition. In addition, a critical discussion on the future development of fiber reinforcement is conducted as well. Therefore, this review not only offers guidance and references to the experimental investigation on the multiscale behavior of FRCCs under cyclic loadings, but also promotes the further development of fiber reinforcement techniques.

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“…Researchers have studied the fatigue life of fiber-reinforced high-strength concretes to determine the number of cycles that the specimen can withstand [ 49 , 50 ]. Others have studied cyclic tensile behavior of SFRC to reveal the underlying damage mechanism and SFRC specimens subjected to cyclic compressive load to a variety of high-stress range and high strain rate [ 51 , 52 , 53 ]. There are only a few cyclic experimental tests on SFRC beams under flexure [ 54 , 55 , 56 , 57 , 58 , 59 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Steel Fibers on the Hysteretic Performance of Concrete Beams with Steel Reinforcement—Tests and Analysis

et al. 2020

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The use of fibers as mass reinforcement to delay cracking and to improve the strength and the post-cracking performance of reinforced concrete (RC) beams has been well documented. However, issues of common engineering practice about the beneficial effect of steel fibers to the seismic resistance of RC structural members in active earthquake zones have not yet been fully clarified. This study presents an experimental and a numerical approach to the aforementioned question. The hysteretic response of slender and deep steel fiber-reinforced concrete (SFRC) beams reinforced with steel reinforcement is investigated through tests of eleven beams subjected to reversal cyclic loading and numerical analysis using 3D finite element (FE) modeling. The experimental program includes flexural and shear-critical SFRC beams with different ratios of steel reinforcing bars (0.55% and 1.0%), closed stirrups (from 0 to 0.5%), and fibers with content from 0.5 to 3% per volume. The developed nonlinear FE numerical simulation considers well-established relationships for the compression and tensional behavior of SFRC that are based on test results. Specifically, a smeared crack model is proposed for the post-cracking behavior of SFRC under tension, which employs the fracture characteristics of the composite material using stress versus crack width curves with tension softening. Axial tension tests of prismatic SFRC specimens are also included in this study to support the experimental project and to verify the proposed model. Comparing the numerical results with the experimental ones it is revealed that the proposed model is efficient and accurately captures the crucial aspects of the response, such as the SFRC tension softening effect, the load versus deformation cyclic envelope and the influence of the fibers on the overall hysteretic performance. The findings of this study also reveal that SFRC beams showed enhanced cyclic behavior in terms of residual stiffness, load-bearing capacity, deformation, energy dissipation ability and cracking performance, maintaining their integrity through the imposed reversal cyclic tests.

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Cyclic tensile behavior of SFRC: Experimental research and analytical model

Cited by 45 publications

References 40 publications

Multi‐scale analysis of short glass fiber‐reinforced polypropylene under monotonic and fatigue loading

Multi‐scale analysis of short glass fiber‐reinforced polypropylene under monotonic and fatigue loading

Multiscale Geomechanical Behavior of Fiber-Reinforced Cementitious Composites Under Cyclic Loading Conditions—A Review

Effect of Steel Fibers on the Hysteretic Performance of Concrete Beams with Steel Reinforcement—Tests and Analysis

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