Analysis of influence of fabric architecture and radiation characteristics on effective thermal conductivity of carbonized woven thermal protection composites

Li, Weijie; Liang, Haoran; Zhang, Zhongwei; Huang, Jie; Huang, Haiming; Liang, Jun

doi:10.1016/j.actaastro.2021.07.030

Cited by 11 publications

(3 citation statements)

References 24 publications

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“…Table 3 shows the thermal conductivity analysis results, which are the thermal characteristics of the outer layer of the manufactured self-reinforced composite material according to the manufacturing conditions. HDPE thermal conductivity values vary depending on factors such as the thickness and density of the fabric, and since the thermal conductivity of the air layer is 0.024 W/m•k, the thermal conductivity value varies depending on the content of the air layer [34][35][36]. The HDPE woven fabrics manufactured in this study have different structures such as plain weave, twill weave, satin weave, warp weave, and circular weave.…”

Section: Thermal Characterization Resultsmentioning

confidence: 99%

Analysis of Mechanical Properties and Structural Analysis According to the Multi-Layered Structure of Polyethylene-Based Self-Reinforced Composites

Yu,

Lee,

Kim

et al. 2023

Polymers

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In this research, a self-reinforced composite material was manufactured using a single polyethylene material, and this self-reinforced composite material has excellent recyclability and is environmentally friendly compared to composite materials composed of other types of material, such as glass fiber reinforced composites (GFRP) and carbon fiber reinforced composites (CFRP). In this research, the manufactured self-reinforced composite material consists of an outer layer and an inner layer. To manufacture the outer layer, low density polyethylene (LDPE) films were laminated on high density polyethylene (HDPE) fabrics and knitted fabrics, and composite materials were prepared at various temperatures using hot stamping. A 3D printing process was utilized to manufacture the inner layer. After designing a structure with a cross-sectional shape of a triangle, circle, or hexagon, the inner layer structure was manufactured by 3D printing high-density polyethylene material. As an adhesive film for bonding the outer layer and the inner layer, a polyethylene-based self-reinforced composite material was prepared using a low-density polyethylene material. Input data for simulation of self-reinforced composite materials were obtained through tensile property analysis using a universal testing machine (UTM, Shimadzu, Kyoto, Japan), and the physical property values derived as output data and actual experimental values were obtained. As a result of the comparison, the error rate between simulation data and experimental data was 5.4% when the shape of the inner layer of self-reinforced composite material was a hexagon, 3.6% when it was a circle, and 7.8% when a triangular shape showed the highest value. Simulation in a virtual space can reduce the time and cost required for actual research and can be important data for producing high-quality products.

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Section: Thermal Characterization Resultsmentioning

confidence: 99%

Analysis of Mechanical Properties and Structural Analysis According to the Multi-Layered Structure of Polyethylene-Based Self-Reinforced Composites

Yu,

Lee,

Kim

et al. 2023

Polymers

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“…It considered a carbon/phenolic composite with an angle‐interlock fabric. The material properties came from [39, 40].…”

Section: Resultsmentioning

confidence: 99%

Heat insulation and ablation resistance performance of continuous fiber reinforced composites with integrated gradient fabric

Zhang

Zhu³

et al. 2022

Polymer Composites

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The continuous fiber reinforced porous resin‐based composites with integrated gradient fabric (CPIGF) were successfully prepared. From the bottom to the top surface, the fiber volume fraction of the integrated fabric gradually increased, as well as the fabric architecture changed, meanwhile the porosity of the resin gradually decreased. The temperature in the inner composite increased quite slowly during ablation, and the linear ablation rate ranged from 0.019 mm/s to 0.029 mm/s. The simulation results showed that the good heat insulation capacity of CPIGFs was attributed to the anisotropy properties of the fabric architecture. The microstructure analysis showed that the good ablation resistance came from both the thermal expansion of the integrated gradient fabric and the densification of the zone with 3D orthogonal woven fabric. This work is helpful for designing thermal protection materials having both heat insulation and ablation resistance for hypersonic aircrafts.

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“…Effective thermal conductivity of fabric is the sum of diffusive thermal conductivity (kc) (W/(m.K)) and radiative thermal conductivity (kr) (W/(m.K)) , 30 which is given by…”

Section: Numerical Modellingmentioning

confidence: 99%

Effect of layering sequence and ambient temperature on thermal insulation of multilayer high bulk nonwoven under extreme cold temperatures

Dupade

Kumari

Premachandran

et al. 2022

Journal of Industrial Textiles

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In extreme cold weather clothing ensemble, multiple layers of high bulk nonwovens are used to provide thermal insulation to the wearer. In this work, the effect of layering sequence in multi-layered high bulk thermal bonded nonwoven assembly on its thermal resistance is evaluated experimentally under sub-zero temperatures. Two multi-layered nonwovens, one made up of 1.4 denier solid (1.4 D S), 6 denier hollow (6 D H) and 15 denier hollow (15 D H) and the second made up of 3 denier hollow (3 D H), 6 denier hollow (6 D H) and 15 denier hollow (15 D H) polyester fibres were studied. The experiments were performed in a climatic chamber in the temperature range of 310 K to 210 K. Numerical simulations were carried out assuming heat transfer through the nonwovens as one-dimensional coupled conduction-radiation. The numerical methodology was developed using theoretical relations available in the literature to estimate the steady-state temperature profiles through the nonwoven layers and were validated using experimental data. The concurrence of experimental and numerical temperature profiles justifies the numerical methodology adopted in this work. Thermal resistance provided by the high bulk nonwoven increases with a decrease in ambient temperature. It is found that the thermal conductivity of nonwoven layers decreases from inner-to outer layers at a given ambient temperature. The heat flux through nonwoven layers, overall thermal conductivity and the thermal resistance of multi-layer nonwoven are independent of layering sequence if the convective heat transfer is extremely low.

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Analysis of influence of fabric architecture and radiation characteristics on effective thermal conductivity of carbonized woven thermal protection composites

Cited by 11 publications

References 24 publications

Analysis of Mechanical Properties and Structural Analysis According to the Multi-Layered Structure of Polyethylene-Based Self-Reinforced Composites

Analysis of Mechanical Properties and Structural Analysis According to the Multi-Layered Structure of Polyethylene-Based Self-Reinforced Composites

Heat insulation and ablation resistance performance of continuous fiber reinforced composites with integrated gradient fabric

Effect of layering sequence and ambient temperature on thermal insulation of multilayer high bulk nonwoven under extreme cold temperatures

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