Prediction of residual mechanical properties in flexure-after-impact of woven composite beams through electrical resistance measurement

Cheng, Xiaoying; Gong, Yongjun; Liu, Yi‐Sheng; Hu, Xudong

doi:10.1016/j.compstruct.2020.112066

Cited by 6 publications

(4 citation statements)

References 37 publications

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“…A determination coefficient, R 2 , was 0.808, which means a good descriptive capability of this model. The experimental points and line that corresponded to criteria (7) are shown in Figure 3b. The proposed criteria can be used to define the failure of composite pipes obtained by winding.…”

Section: Failure Criterionmentioning

confidence: 99%

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Mechanical Properties Degradation of Fiberglass Tubes during Biaxial Proportional Cyclic Loading

et al. 2023

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Composite structures during an operation are subjected to various types of external loading (impact, vibration, cyclic, etc.), which may lead to a decrease in mechanical properties. Previously, many experimental investigations of the mechanical behavior of composites under uniaxial cyclic loading were carried out. Acquisition of new data on the reduction of composite materials’ mechanical characteristics under conditions of multiaxial cyclic loading, as well as verification of existing models for calculation of the residual properties, are relevant. Therefore, this work is devoted to the experimental investigation of the mechanical behavior of fiberglass tubes under proportional cyclic loading. Static and fatigue tests were carried out under tension with torsion conditions. Inhomogeneous strain fields were obtained using a non-contact optical video system VIC-3D. The structural damage accumulation processes were analyzed by an AMSY-6 acoustic emission signals recording system. Surface defects were determined using a DinoLite microscope. Residual dynamic elastic modules were calculated during fatigue tests, and fatigue sensitivity curves were built. Data was approximated using various models, and their high descriptive capability was revealed. Damage accumulation stages were determined. The dependence of the models’ parameters on a stress state were observed. It was concluded that multiaxial cyclic loading leads to a significant decrease in mechanical properties, which should be taken into account in composite structure design.

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Section: Failure Criterionmentioning

confidence: 99%

“…Every unforeseen impact, vibration, or other load, even of low intensity and duration, can lead to a significant reduction in the exploitation time [7][8][9][10][11][12]. In this regard, it is relevant to investigate patterns of the degradation of composites' mechanical properties under complex and combined loads.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties Degradation of Fiberglass Tubes during Biaxial Proportional Cyclic Loading

et al. 2023

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“…Composite materials are widely used in various fields including aerospace, ship, wind energy and construction due to their advantages of light weight, outstanding performance and flexible designability [1][2][3][4][5][6]. 3D woven composites possess higher interlaminar properties and impact damage tolerance than traditional laminated composites depending on their binder warp yarns in the thickness direction, which can maintain the structural integrity of the whole material [7][8][9][10][11][12][13][14][15]. The composites in service often suffer from low-velocity impact (LVI) damages due to the impact of tools, hail, runway sand, etc The tiny marks left on the surface of the materials are visually difficult to detect or barely detectable, and a lot of damages even occur inside the materials.…”

Section: Introductionmentioning

confidence: 99%

Failure assessment of 3D woven composites under compression after low-velocity impact

Sun

Dai

Huang

et al. 2022

Mater. Res. Express

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The failure mechanism of 3D woven composites subjected to compression loading along principal/off-axis direction after low-velocity impact (LVI) was assessed by experimental and numerical methods. The low-velocity impacts under 26.8 J and 80 J energies were applied to the specimens with off-axis angles of 0° and 45°. It can be observed that the impact damages are direction-dependent, which is determined by the weft and warp orientations. By performing the compression-after-impact (CAI) tests, it is found that the CAI strength along principal direction is more sensitive to the low-velocity impact than that along off-axis direction. A finite element dynamic analytical method was established, considering four off-axis angles (0°, 30°, 45° and 60°). The results show that the extension direction of the impact damage changes regularly with the off-axis angle. During the compression, the small off-axis angle can make the specimen prone to produce a sudden crushing failure determined by the fiber failure due to the high axial stress. As the off-axis angle increases, the matrix damage gradually holds the dominant position due to the growing shear effect, which makes the specimen produce a ductile failure governed by the accumulated matrix failure.

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“…Carbon nanomaterials including, but not limited to, carbon nanotubes (CNTs) and graphene [1] have attracted considerable attention for a variety of uses, in both research and industry, due to their unique mechanical and electrical properties [2]. The high electrical conductivity, high aspect ratio and cylindrical shape of the CNTs, have made them interesting components for the preparation of conductive polymer nanocomposites [3].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of dispersion of MWCNT/cellulose composites sheet using electrical resistance 3D-mapping for strain sensing

Shin

Kim

DeVries

et al. 2020

Funct. Compos. Struct.

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Carbon nanomaterials including, but not limited to, carbon nanotubes (CNTs) and graphene have attracted considerable attention due to their nanoscale electrical conductivity. Flexible sensors have experienced a growing demand due to several potential applications, such as personalized health monitoring and robots. In this study, CNT/cellulose composite sheets were manufactured using spray methods for flexible sensors. MWCNTs were ultrasonically dispersed in an acetone solvent and flexible plain paper was used as a substrate on which the CNT suspension was sprayed. At the end of the coating process, to remove the acetone solvent, the specimens were dried in an oven. Electrical resistance (ER) three-dimensional-mapping and optical observation were used to confirm and evaluate the dispersion of CNTs on the paper. To access the wettability of CNT/cellulose sheets, the changes of static contact angle of distilled water droplets on the sheets were measured. The critical point of the CNT coating numbers was determined using the ER method as well as the change of wettability using the static contact angle measurements.

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Prediction of residual mechanical properties in flexure-after-impact of woven composite beams through electrical resistance measurement

Cited by 6 publications

References 37 publications

Mechanical Properties Degradation of Fiberglass Tubes during Biaxial Proportional Cyclic Loading

Mechanical Properties Degradation of Fiberglass Tubes during Biaxial Proportional Cyclic Loading

Failure assessment of 3D woven composites under compression after low-velocity impact

Evaluation of dispersion of MWCNT/cellulose composites sheet using electrical resistance 3D-mapping for strain sensing

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