Flexural fatigue properties and failure propagation of 3D stitched composites under 3-point bending loading

Song, Wen Long; Fan, Wei; Liu, Tao; Chen, Xiaogang; Wang, Shujuan; Zhao, Yufen; Song, Chenyang; Mi, Pengbo; Dou, Hao; Gao, Xingzhong

doi:10.1016/j.ijfatigue.2021.106507

Cited by 18 publications

(3 citation statements)

References 38 publications

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“…The maximum midspan deflection and average tensile strain of OPC and PFAPC both increased as the cycle ratio increased, and their deformation characteristics were broadly categorized into three stages [ 4 , 5 , 27 , 28 ]: development, stable, and failure stages, as shown in Figure 4 . The interior microcracks of the material started to increase under fatigue stress during the development stage (often before a 20% cyclic ratio).…”

Section: Resultsmentioning

confidence: 99%

Study on Flexural Fatigue Properties of POM Fiber Airport Pavement Concrete

et al. 2022

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Polyoxymethylene (POM) fiber is a new polymer fiber with the potential to improve the performance of airport pavement concrete. The effect of POM fiber on the flexural fatigue properties of concrete is an important issue in its application for airport pavement concrete. In this study, four-point flexural fatigue experiments were conducted using ordinary performance concrete (OPC) and POM fiber airport pavement concrete (PFAPC) with fiber volume contents of 0.6 and 1.2%, at four stress levels, to examine the flexural fatigue characteristics of these materials. A two-parameter Weibull distribution test of flexural fatigue life was performed, after examining the change in flexural fatigue deformation using the cycle ratio (n/N). A flexural fatigue life equation was then constructed considering various failure probabilities (survival rate). The results show that POM fiber had no discernible impact on the static load strength of airport pavement concrete, and the difference between PFAPC and OPC in terms of static load strength was less than 5%. POM fiber can substantially increase the flexural fatigue deformation capacity of airport pavement concrete by almost 100%, but POM fiber had a different degree of detrimental impact on the fatigue life of airport pavement concrete compared to OPC, with a maximum decrease of 85%. The fatigue lives of OPC and PFAPC adhered to the two-parameter Weibull distribution, the single- and double-log fatigue equations considering various failure probabilities had a high fitting degree based on the two-parameter Weibull distribution, and their R2 was essentially over 0.90. The ultimate fatigue strength of PFAPC was roughly 4% lower than that of OPC. This study on the flexural fatigue properties of POM fiber airport pavement concrete has apparent research value for the extension of POM fiber to the construction of long-life airport pavements.

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Section: Resultsmentioning

confidence: 99%

Study on Flexural Fatigue Properties of POM Fiber Airport Pavement Concrete

et al. 2022

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“…The other is to manufacture near-net-shape preform by cutting and stitching the single structural part and then forming in the mold during the post-processing process. 12,13 It is widely known that the cross-section shape, orientation, and interlacing state of yarn in the composite preform, are critical to the load-bearing performance of the composite. 14 However, these operations increase the fiber damage and destroy the yarn's structural integrity.…”

Section: Introductionmentioning

confidence: 99%

A novel method for design and simulation of 3D woven preform

Gao

Chen

Zhao

2023

Journal of Industrial Textiles

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Increasing demand for high-performance applications of composite materials requires an integral forming process for complex components. As a composite reinforcement, 3D (three-dimensional) woven fabric has advantages in producing near-net-shaped preforms. However, previous studies focused on plates with uniform thickness, which are often variable thicknesses or special-shaped parts in practical applications. Some structures are prepared by stitching and then formed in the mold, but this increases the fiber damage. This study proposes a fabric design method based on yarn movement. By controlling the movement direction and distance of each yarn, the warp path in the fabric can be designed, which cause the change of fabric structure and achieve the integrated forming of special-shaped preforms. Based on this method, a software package for the preforms design and simulation is developed, which can be used for various woven and 3D textiles to illustrate its versatility.

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“…[16][17][18][19][20][21] To make the composites safely applied in primary load-bearing structures, the micro-stress and the progressive damage simulation have become important and challenging topics for the strength analysis of 3D braided composites. Kang et al 22 and Song et al 23 adopted real-time online damage monitoring methods to investigate the static and fatigue failure propagation of advanced 3D textile composites through a three-point bending test. Zeng et al 24 established a multiphase element model for calculating the local stress of 3D braided composites.…”

Section: Introductionmentioning

confidence: 99%

Thermo-mechanical behavior of 3D multi-directional braided composites based on a two-scale method

Dong

Luo

Kuai

et al. 2023

Journal of Industrial Textiles

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Two-scale modeling is adopted to investigate the thermo-mechanical behavior of 3D four-directional (3D4D), 3D five-directional (3D5D), and 3D full five-directional (3DF5D) braided composites. Based on the stress-strain relationship considering thermal expansion and the periodic boundary conditions, the elastic constants and the coefficients of thermal expansion (CTE) of the three types of braided composites are predicted by a two-scale homogenization method. The micro stress under free expansion and thermo-mechanical coupling is also simulated. The calculated results are in good agreement with experimental results from relevant references. The numerical results show that the longitudinal elastic and thermal expansion properties are gradually improved with the increase of axial yarn content from 3D4D to 3D5D and then to 3DF5D braided composites. The braiding angle corresponding to the zero longitudinal CTE of each braided structure is basically about 40°. Furthermore, with the increase of temperature, the longitudinal micro-stress in yarns increases gradually, but that in matrix drops. These conclusions will provide a reliable basis for the structural optimization design and safety evaluation of 3D multi-directional braided composites in a thermal environment.

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Flexural fatigue properties and failure propagation of 3D stitched composites under 3-point bending loading

Cited by 18 publications

References 38 publications

Study on Flexural Fatigue Properties of POM Fiber Airport Pavement Concrete

Study on Flexural Fatigue Properties of POM Fiber Airport Pavement Concrete

A novel method for design and simulation of 3D woven preform

Thermo-mechanical behavior of 3D multi-directional braided composites based on a two-scale method

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