A real micro-structural model to simulate the transversal compression behaviors of unidirectional composites based on the μ-CT detection

Liu, Tao; Fan, Congbo; Ke, Zhenxia; Gao, Xingzhong; Fan, Wei; Yu, Lingjie

doi:10.1016/j.coco.2022.101184

Cited by 15 publications

(5 citation statements)

References 10 publications

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“…The distribution of these micro scale RUCs is based on CT scan studies. 42 3-D brick elements having 20 nodes (SOLID186) have been used in finite element modeling. This element pertains to C o continuum and is widely used in FEA.…”

Section: Discretization Of Ud Composite: Identification Of Micro Scal...mentioning

confidence: 99%

“…These micro scale RUCs have fibers of hexagonal arrangement with V f values of 0.35, 0.40, 0.45, 0.55, 0.60, 0.65, 0.70, and 0.75, while maintaining an overall 0.65 V f for the UD composite. The distribution of these micro scale RUCs is based on CT scan studies 42 . 3‐D brick elements having 20 nodes (SOLID186) have been used in finite element modeling.…”

Section: Numerical Modeling Approachmentioning

confidence: 99%

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A micromechanical study on shear performance of unidirectional composites with randomly distributed fibers in the transverse cross‐section

Muthukumar,

Kumar,

Shubham

et al. 2024

Polymer Composites

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The properties of unidirectional (UD) composites has been investigated by analyzing their elastic and strength characteristics under shear loading. The UD fiber‐reinforced polymer (FRP) composites usually consist of fibers randomly dispersed throughout the cross‐section in the transverse direction which is generally not accounted for. A micromechanical model based on finite element analysis (FEA) approach is utilized here to examine these properties. The study begins by identifying micro scale unit cells or repetitive unit cells (RUCs) at the micro scale, as well as representative volume elements (RVEs). The distribution of fiber volume fraction (Vf) varies among various micro scale unit cells positioned in the transverse cross‐section. The elastic properties and strength are estimated by considering the properties of the matrix and fibers, and the configuration of micro scale unit cells, which feature a fiber arrangement which is categorized as hexagonal and varying Vf at different locations (from 0.35 to 0.75). However, the overall Vf for the UD composite remains constant at 0.65. Studies are also carried out with the random distribution of fibers at micro scale unit cells. The findings reveal that the random distribution of fibers significantly impacts the shear behavior of the composite. This investigation provides valuable insights into how the mechanical properties of the UD composite are subjective by the distribution of fiber, thereby contributing to the design and development of this light weight high‐performance material.Highlights Elastic and strength analysis of UD composites is presented. Emphasis is on fiber dispersion in transverse plane. Microscale unit cells, RUCs and RVE are identified. Studies are carried out based on micromechanical model. Influence of fiber distribution on shear behavior is investigated.

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Section: Discretization Of Ud Composite: Identification Of Micro Scal...mentioning

confidence: 99%

Section: Numerical Modeling Approachmentioning

confidence: 99%

A micromechanical study on shear performance of unidirectional composites with randomly distributed fibers in the transverse cross‐section

Muthukumar,

Kumar,

Shubham

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

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“…Schock et al [ 13 ] suggested a combination of high-resolution dual-energy X-ray micro-CT with subsequent advanced image processing steps to derive characteristic parameters for describing real porous systems. Liu et al [ 14 ] proposed the reconstruction of a microscopic heat transfer model through CT images to investigate the interaction between coal temperature rise fracturing and coal heat transfer performance, introducing a novel approach for efficient heat injection mining of coal seams. Singh et al [ 15 ] introduced a texture characterization method named Gray-Size Area Matrix (GLSZM), directly applied to the original gray-level micro-CT images capable of reproducing these images with reduced time and high computational efficiency.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of fluid flow behavior in steel cord with lattice Boltzmann methodology: The impacts of microstructure and loading force

Zhao,

Jin,

Fan

et al. 2024

PLoS ONE

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Steel cord materials were found to have internal porous microstructures and complex fluid flow properties. However, current studies have rarely reported the transport behavior of steel cord materials from a microscopic viewpoint. The computed tomography (CT) scanning technology and lattice Boltzmann method (LBM) were used in this study to reconstruct and compare the real three-dimensional (3D) pore structures and fluid flow in the original and tensile (by loading 800 N force) steel cord samples. The pore-scale LBM results showed that fluid velocities increased as displacement differential pressure increased in both the original and tensile steel cord samples, but with two different critical values of 3.3273 Pa and 2.6122 Pa, respectively. The original steel cord sample had higher maximal and average seepage velocities at the 1/2 sections of 3D construction images than the tensile steel cord sample. These phenomena should be attributed to the fact that when the original steel cord sample was stretched, its porosity decreased, pore radius increased, flow channel connectivity improved, and thus flow velocity increased. Moreover, when the internal porosity of tensile steel cord sample was increased by 1 time, lead the maximum velocity to increase by 1.52 times, and the average velocity was increased by 1.66 times. Furthermore, when the density range was determined to be 0–38, the pore phase showed the best consistency with the segmentation area. Depending on the Zou-He Boundary and Regularized Boundary, the relative error of simulated average velocities was only 0.2602 percent.

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“…The interlaced braided structure can effectively block the cracks 23,24 and makes stress distribution as well as damage evolution around the open holes. 25 The stress concentration around the open holes results in the damage modes of composites different from the unperforated composites. Hence the mechanical behavior of braided composite structures is considered critical in joints design, but it is unclear yet.…”

Section: Introductionmentioning

confidence: 99%

Flexural performance of three-dimensional braided open-hole composite with different hole diameter and preform size

Gao

Wen

Siddique

et al. 2022

Journal of Industrial Textiles

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Three dimensional (3-D) braided composite is one element of the structures which must connect with other structural elements, to form load transmission path during its service in aerospace, transport and engineering structures. Bolted joints are usually the lower-cost option because of its simplicity, low-cost tooling, and inspection requirements. Secondary bending induced by minor eccentricity of the loads occurs in many types of joints and can cause serious problems. In this study, flexural performance of 3-D braided open-hole composite (3DBOHC) considering open-hole diameter and preform size is systematically studied. Three-point bending test combined with a high-speed camera observation was conducted. The results show that the damage initiates in the top surface of 3DBOHC. Failure mode gradually changed from fiber breakage into interface debonding, when increasing the braiding angle. The reduction of composite strength becomes less sensitive to drilling process when braiding angle increased. The strength reduction of 3DBOHC with hole diameter of 1.5 is 13.8%, 10.3% and 5.8% for 10°, 20° and 30°, respectively. The increase in modulus and strength achieved by increasing preform size is higher for larger braiding angle 3DBOHCs. When the preform size increased from 3 ⅹ 9 to 3 ⅹ 17, the modulus increase for 10°20°and 30° 3DBOHCs is 25.4%, 42.5% and 43.2%, respectively. The strength increase for 10°20°and 30°3DBOHCs is 20.3%, 26.3% and 30.2%, respectively. This research provides a comprehensive insight for the design and application of 3-D braided composite joints.

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A real micro-structural model to simulate the transversal compression behaviors of unidirectional composites based on the μ-CT detection

Cited by 15 publications

References 10 publications

A micromechanical study on shear performance of unidirectional composites with randomly distributed fibers in the transverse cross‐section

A micromechanical study on shear performance of unidirectional composites with randomly distributed fibers in the transverse cross‐section

Numerical investigation of fluid flow behavior in steel cord with lattice Boltzmann methodology: The impacts of microstructure and loading force

Flexural performance of three-dimensional braided open-hole composite with different hole diameter and preform size

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