Mechanical Behavior of Shape Memory Alloy Fibers Embedded in Engineered Cementitious Composite Matrix under Cyclic Pullout Loads

Yang, Zhao; Du, Yalong; Liang, Yujia; Ke, Xiaolong

doi:10.3390/ma15134531

Cited by 17 publications

(8 citation statements)

References 16 publications

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“…The model includes the influence of various factors having clear physical meanings, not just the diameter. The formulation is defined in Equation (6) where d e denotes the damage evolution parameter, and K 0 denotes the initial stiffness of the curve.…”

Section: Prediction Of the Model Parametersmentioning

confidence: 99%

“…ECC is manufactured based on the designed theory of micromechanics and fracture mechanics and is composed mainly of cement, fine-graded aggregate, admixture, and is reinforced with short fibers [4]. As a high-performance cementitious composite, the hardened composite possesses high strength, excellent ductility, and significant strain hardening behavior [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Analytical and Numerical Modeling of the Pullout Behavior between High-Strength Stainless Steel Wire Mesh and ECC

et al. 2022

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Bond behavior is a key factor in the engineering application of composite material. This study focuses on the constitutive model of the bond behavior between high-strength stainless steel strand mesh and Engineered Cementitious Composites (ECC). In this paper, the effects of strand diameter, bond length and transverse steel strand spacing on bond behavior were studied based on 51 direct pullout tests. Experimental results showed that the high-strength stainless steel strand mesh provided specimens an excellent ductility. Based on the experimental data, the existing bond–slip model was revised using the theory of damage mechanics, which fully considered the influence of the steel strand diameter on the initial tangent stiffness of the bond–slip curve. The results of the model verification analysis show that errors are within 10% for most parameters of the bond–slip model proposed, especially in the ascending section, the errors are within 5%, indicating that the calculated results using the revised model are in good agreement with the test results. In addition, the revised model was applied to the finite element analysis by using the software ABAQUS to simulate the pullout test, in which the spring-2 nonlinear spring element was used to stimulate the bond behavior between steel strand meshes and ECC. The simulation results show that the numerical analysis fits the experimental result well, which further verifies the accuracy of the model and the feasibility and applicability of the numerical analysis method.

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Section: Prediction Of the Model Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical and Numerical Modeling of the Pullout Behavior between High-Strength Stainless Steel Wire Mesh and ECC

et al. 2022

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“…Previous investigations primarily examined the effects of fiber shape, cementitious, and ECC matrix on the bond slip characteristics of superelastic SMA fibers in cementitious ECC mixtures. [25,26,[33][34][35][36][37]. However, comprehensive and systematic investigations of the pullout behavior in SMA Fiber-Reinforced Engineered Cementitious Composite (SMAF-ECC) matrices are notably limited.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Superelastic Shape Memory Alloy Fibers (SMAF) for Enhancing Pullout Performance in Engineered Cementitious Composites (ECC)

Umar,

Qian,

Khan

et al. 2024

Preprint

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This experimental study investigates the effect of superelastic shape memory alloy fibers (SMAF) on the pullout performance of Engineered Cementitious Composite (ECC). Various diameters, forms, and surface treatments of SMAF were examined, including Linear shape (LS-SMAF), indented hook shape (HIS-SMAF), and indented shape (IS-SMAF) with diameters of 0.8 and 1.0 mm. sandpaper polishing technique was used for surface treatment. A constant water-to-cement ratio of 0.60 was used to fabricate ECC. Single-fiber pullout tests, monotonic and cyclic, were conducted on ECC mixtures incorporating various polyvinyl alcohol (PVA) content (1.5% to 2%). Scanning Electron Microscope (SEM) analysis was performed to study the internal structure of ECC. Results showed that treated IS-SMAF demonstrated superior pullout performance. Additionally, IHS-SMAF outperformed LS-SMAF, whereas ECC with higher PVA content showed excellent pullout performance. This study concludes the significance of fiber characteristics and ECC mix composition in enhancing single-fiber pullout performance.

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“…However, just like concrete and mortar matrix materials, the bonding strength of ECC matrix and SMA fiber is very poor because of the smooth surface of SMA fibers, so it is necessary to take some measures to improve the bonding or anchoring strength of SMA fiber and ECC matrix. In the previous study, the author studied the deformation recovery and cyclic energy dissipation ability of SMA fibers and ECC matrix under cyclic pullout loads [ 37 ]. In order to more accurately analyze the bonding and anchoring capacity of SMA fiber and ECC matrix, the strength utilization ratio of SMA fiber before anchoring failure, the direct pull-out test of SMA fiber and ECC matrix was carried out in this study, and the influencing factors such as end shape, diameter, and bonding length of SMA fibers were compared as well.…”

Section: Introductionmentioning

confidence: 99%

Bonding Mechanical Properties between SMA Fiber and ECC Matrix under Direct Pullout Loads

Yang

Gong

et al. 2023

Materials

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SMAF-ECC material composed of shape memory alloy fiber (SMAF) and engineered cementitious composite (ECC) has good bending and tensile properties, as well as good crack self-healing ability, energy consumption, and self-centering ability. The bond behavior between fiber and matrix is crucial to the effective utilization of the superelasticity of SMAF. The experimental study considered three variables: SMA fiber diameter, fiber end shape, and bond length. The pullout stress–strain curve of SMAF was obtained, and the maximum pullout stress, maximum bond stress, and fiber utilization rate were analyzed. Compared with the straight end and the hook end, the maximum pullout stress of the specimen using the knotted end SMAF is above 900 MPa, the fiber undergoes martensitic transformation, and the fiber utilization rate is above 80%, indicating that the setting of the knotted end can give full play to the superelasticity of the SMAF. Within the effective bond length range, increasing the bond length can increase the maximum anchorage force of the knotted end SMAF. Increasing the fiber diameter can increase the maximum pullout stress and maximum anchoring force of the knotted end SMAF but reduce the utilization rate of SMA fiber. This study provides a reliable theoretical basis for the bonding properties between SMAF and ECC.

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Mechanical Behavior of Shape Memory Alloy Fibers Embedded in Engineered Cementitious Composite Matrix under Cyclic Pullout Loads

Cited by 17 publications

References 16 publications

Analytical and Numerical Modeling of the Pullout Behavior between High-Strength Stainless Steel Wire Mesh and ECC

Analytical and Numerical Modeling of the Pullout Behavior between High-Strength Stainless Steel Wire Mesh and ECC

Optimizing Superelastic Shape Memory Alloy Fibers (SMAF) for Enhancing Pullout Performance in Engineered Cementitious Composites (ECC)

Bonding Mechanical Properties between SMA Fiber and ECC Matrix under Direct Pullout Loads

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