Effects of the fiber orientation and fiber aspect ratio on the tensile strength of Csf/Mg composites

Tian, Wenlong; Qi, Lehua; Zhou, Jiming; Guan, Juntao

doi:10.1016/j.commatsci.2014.03.004

Cited by 39 publications

(11 citation statements)

References 29 publications

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“…While L / d exceed 20 the composite exhibits a quasi-linear superelasticity, the hysteresis loops of which do not change any more. Our finding is similar to previous study on the tensile strength of carbon fibers reinforced magnesium matrix composites 30 . Therefore, in finite element analysis, given the trade-off relationship between efficiency and precision, the mechanical response of the NWs-SMA composite (when L / d > 20) could be represented by the model with NWs aspect ratio L / d = 20.…”

Section: Resultssupporting

confidence: 93%

Origin of high strength, low modulus superelasticity in nanowire-shape memory alloy composites

Zhang

Zong

Cui

et al. 2017

Sci Rep

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An open question is the underlying mechanisms for a recent discovered nanocomposite, which composed of shape memory alloy (SMA) matrix with embedded metallic nanowires (NWs), demonstrating novel mechanical properties, such as large quasi-linear elastic strain, low Young’s modulus and high yield strength. We use finite element simulations to investigate the interplay between the superelasticity of SMA matrix and the elastic-plastic deformation of embedded NWs. Our results show that stress transfer plays a dominated role in determining the quasi-linear behavior of the nanocomposite. The corresponding microstructure evolution indicate that the transfer is due to the coupling between plastic deformation within the NWs and martensitic transformation in the matrix, i.e., the martensitic transformation of the SMA matrix promotes local plastic deformation nearby, and the high plastic strain region of NWs retains considerable martensite in the surrounding SMA matrix, thus facilitating continues martensitic transformation in subsequent loading. Based on these findings, we propose a general criterion for achieving quasi-linear elasticity.

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Section: Resultssupporting

confidence: 93%

Origin of high strength, low modulus superelasticity in nanowire-shape memory alloy composites

Zhang

Zong

Cui

et al. 2017

Sci Rep

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“…There is a significant contribution of the carbon fibers in the load carrying capacity of the composite loaded parallel to the reinforced fibers (the parallel composite specimen, Table 4 ). This is due to the longitudinal fibers directly absorbing, transferring, and distributing the applied load uniformly throughout the cross-section of the tested material [ 35 , 36 , 37 ]. On the other hand, when loading the AZ91/carbon fiber composite normal to the reinforced fibers the contribution of the matrix seems more significant in the increased ductility and lower compressive strength.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Mechanical Properties of AZ91 Rein-Forced with High Volume Fraction of Oriented Short Carbon Fibers

et al. 2022

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In this study, AZ91/23 vol.% short carbon fiber composite was produced by a squeeze casting technique using a cylindrical pre-form of treated carbon fibers, in which the fibers are randomly oriented in the horizontal plane. Cylindrical specimens (height = 9 mm and diameter = 6 mm) were machined from the as-cast AZ91 matrix and its composite. The full behavior of the produced composite was studied through the test specimens machined in two directions, namely parallel to the reinforced plane (in the radial direction of the cast cylinder) and normal to the reinforced plane (in the axial direction of the cast composite). The microstructures of the produced composite specimens were investigated using SEM equipped with EDS analysis. Density, hardness, compressive, and wear behavior were also investigated. For comparison, the AZ91 matrix was evaluated as a reference. The microstructure of the produced AZ91 matrix alloy and its composite revealed dense materials without casting defects. Both composite specimens show improvement in hardness, compressive strength, and wear properties over the AZ91 matrix. The compressive and wear properties are more fiber orientation-dependent than the hardness results. The parallel composite specimen depicts the highest compressive properties in terms of yield compressive strength (311 MPa) and ultimate compressive strength (419 MPa), compared to that shown by the AZ91 matrix and the normal composite specimen. This improvement in compressive strength was at the expense of ductility. The parallel composite specimen shows the lowest ductility (R = 3.8%), compared to that given by the normal composite specimen (R = 7.1) and the AZ91 matrix alloy (R = 13.6). The wear testing results showed that at the highest wear load of 5 N, the material weight loss of the parallel composite specimen decreases by 44% and 64% compared to the AZ91 matrix and the normal composite specimen, respectively.

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“…Fibers can be well oriented or arbitrarily positioned within the matrix domain and no meshing of individual fibers is needed. In the works of Tian et al [18,19], representative volume elements have been generated by the random sequential absorption algorithm. The generated RVEs have been then analyzed by the finite element method to obtain the effective mechanical properties of carbon reinforced magnesium composites in [18] and short fiber reinforced composites in [19].…”

Section: Introductionmentioning

confidence: 99%

“…In the works of Tian et al [18,19], representative volume elements have been generated by the random sequential absorption algorithm. The generated RVEs have been then analyzed by the finite element method to obtain the effective mechanical properties of carbon reinforced magnesium composites in [18] and short fiber reinforced composites in [19]. Recently, Kebir and Ayad [9] have developed a multi-scale numerical model to predict the elastic properties of short hemp fiber reinforced polypropylene composites.…”

Section: Introductionmentioning

confidence: 99%

A nonlinear finite element formulation for large deflection analysis of 2D composite structures

Tiar

Zouari

Kébir

et al. 2016

Composite Structures

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Effects of the fiber orientation and fiber aspect ratio on the tensile strength of Csf/Mg composites

Cited by 39 publications

References 29 publications

Origin of high strength, low modulus superelasticity in nanowire-shape memory alloy composites

Origin of high strength, low modulus superelasticity in nanowire-shape memory alloy composites

Microstructure and Mechanical Properties of AZ91 Rein-Forced with High Volume Fraction of Oriented Short Carbon Fibers

A nonlinear finite element formulation for large deflection analysis of 2D composite structures

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