Simulation of plate compression behavior of warp-knitted spacer fabrics based on geometry and property parameters

Sun, Fengxin; Ma, Mingying; Pan, Xingxing; Liu, Gui; Yang, Shu; Zheng, Dongfang; Li, Ming; Du, Zhaoqun

doi:10.1177/0040517518760758

Cited by 25 publications

(13 citation statements)

References 23 publications

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“…The spacer fabrics can also be tailored in terms of fabric orientation and density. 20 The present study used a new support surface with no prior conditioning, which may have influenced the efficacy of its microclimate control. Further longitudinal studies are required to assess the pressure redistribution qualities of spacer fabrics, with simulated mechanical loading to investigate wear characteristics.…”

Section: Discussionmentioning

confidence: 99%

A modified evaluation of spacer fabric and airflow technologies for controlling the microclimate at the loaded support interface

Worsley

Bader

2018

Textile Research Journal

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The microclimate between an individual and their support surface can have a significant effect on skin health. Companies have developed mattress systems designed to regulate the temperature and humidity at the individual-support surface interface, utilizing spacer fabric materials and active airflow systems. However, there has been little formal evaluation of their performance. The aim of this study was to evaluate mattress systems using a lab-based approach. A physical model tank was applied to each support surface, filled with 20 L of water maintained at 37 C. A continuous network of perforated plastic tubing deposited moisture equivalent to a rate of 1.5 mL/min for 25 minutes. Humidity and temperature sensors, stitched onto the thin cotton sheet, monitored the interface conditions for a total of 24 h. Tests were conducted using a range of support surfaces incorporating spacer fabrics, with and without active airflow. The results from this study revealed that spacer fabric appears to dissipate heat more effectively than viscoelastic foam (Heat flux 33.6 W/m 2 vs. 10.4 W/m 2). With no active airflow, the viscoelastic foam and spacer fabric exhibited a limited reduction in relative humidity (RH) at the interface. However, with active airflow, the spacer fabric had the ability to reduce RH over time to basal levels through moisture vapor transfer. This represented a change from saturation (99% RH) to ambient humidity (40%) over a 24-h period (water vapor transfer rate ¼ 0.9 g/m 2 ; h). Further parametric testing is required to evaluate the optimal combinations of spacer fabric material and airflow systems.

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Section: Discussionmentioning

confidence: 99%

A modified evaluation of spacer fabric and airflow technologies for controlling the microclimate at the loaded support interface

Worsley

Bader

2018

Textile Research Journal

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“…The mechanical properties of both spacer fabrics [17][18][19][20] and textile reinforced cementitious composites [21] have been simulated by finite element method (FEM) based on continuum mechanics. But a huge number of yarns insert into the cement matrix of CC.…”

Section: Introductionmentioning

confidence: 99%

Lattice modeling for the influence of geometrical patterns of 3D spacer fabric on tensile behavior of concrete canvas

Zhang

Chen

et al. 2021

Jnl of Sandwich Structures & Materials

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Tensile behavior of concrete canvas (CC) mainly depends on the geometric patterns of 3D spacer fabric. A lattice model is proposed to model the three-dimensional structure of CC to investigate the influence of geometric patterns of 3D spacer fabric on the tensile behavior of CC. The stress intensity factor is also applied into the lattice model to study the crack development of CC subjected to tensile load. The simulation results are compared to the experiments to verify the model. Finally, the influence of geometric pattern of outer layer and spacer yarns on tensile behavior of CC are simulated based on our proposed lattice model. The results indicate that the tensile strength of CC increases as the loop unit size of outer surface decreases or the amount of spacer yarns increases; the tensile strength of CC with rhombus loop unit of outer surface layer is higher than that of CC with rectangle loop unit. The tensile strength of CC significantly increases with the increasing inclination angle of spacer yarns in 3D spacer fabric. Furthermore, CC specimens subjected to uni-axial tensile exhibit a multi-cracking behavior, the average crack spacing of specimen decreases with the decreasing inclination angle of spacer yarns in tensile direction.

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“…Sun et al [12] simulated the compression behavior of warp-knitted spacer fabrics using the finite element method based on the geometry and structural parameters of the fabric. The model demonstrated a reasonable estimation of the compression force-strain curve of the spacer fabric in comparison with experimental results.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Compression Performance of Weft-knitted Spacer Fabrics for Protective Applications in View of the Surface Layer Structure

Asayesh

Amini

2021

Fibers Polym

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In recent years, the use of spacer fabrics as cushioning materials in protective clothing and equipment has been highlighted. Thanks to the three-dimensional structure of spacer fabrics, they demonstrate special features. In addition to comfort requirements, the spacer fabrics exhibit good compressive characteristics and energy absorption, which are essential for human body protection against impacts. The cushioning performance of spacer fabric is highly dependent on the compression characteristics of the fabric. Consequently, investigating the relationships between fabric structure and the compression property of spacer fabrics is essential. The goal of this research is to consider the effect of fabric structure on the compression behavior of weft-knitted spacer fabrics made for protective applications. To this end, weft-knitted spacer fabrics with various knit patterns in the surface layer have been fabricated. The results demonstrate that the fabric's compression resistance increases by increasing the number of miss stitches in successive courses in the surface layer. Furthermore, increasing the number of miss stitches in successive courses in the surface layer decreases the fabric's resilience, thickness change, and relative compressibility while increases the absorbed energy and dissipated compression energy of the fabric. Eventually, since spacer fabrics consist of the knit stitches on their surface layers absorb higher energy and demonstrate better resiliency and relative compressibility compared to spacer fabrics consist of the miss and knit stitches on their surface layers, these structures are more appropriate for cushioning applications.

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Simulation of plate compression behavior of warp-knitted spacer fabrics based on geometry and property parameters

Cited by 25 publications

References 23 publications

A modified evaluation of spacer fabric and airflow technologies for controlling the microclimate at the loaded support interface

A modified evaluation of spacer fabric and airflow technologies for controlling the microclimate at the loaded support interface

Lattice modeling for the influence of geometrical patterns of 3D spacer fabric on tensile behavior of concrete canvas

Analysis of the Compression Performance of Weft-knitted Spacer Fabrics for Protective Applications in View of the Surface Layer Structure

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