Prediction of the mechanical behavior of fiber-reinforced composite structure considering its shear angle distribution generated during thermo-compression molding process

Kim, Dug-Joong; Yu, Myeong-Hyeon; Lim, Jae-Yong; Nam, Byeung-Gun; Kim, Kwang Ho

doi:10.1016/j.compstruct.2019.04.043

Cited by 25 publications

(4 citation statements)

References 27 publications

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“…In recent years, the use of carbon fiber reinforced polymer (CFRP) in the fields of aerospace, automobile, and wind power achieved rapid growth due to advantages such as high specific strength and modulus, corrosion resistance, and anti‐fatigue 1–4 . Currently, external thermal heating methods dominate the curing process of the CFRP composite, including autoclave, 5,6 hot molding, 7,8 and oven 9,10 . Although external thermal heating methods have developed maturely to fabricate high‐performance CFRP components, they are unavoidable to rely on the heat conduction of the mold and forced‐convection heat transfer to cure the CFRP composites, resulting in a long curing cycle and high energy consumption for guaranteeing the temperature uniformity along the thickness of CFRP component 11–13 …”

Section: Introductionmentioning

confidence: 99%

Effect of carbon nanotubes on thermoset curing and mechanical properties of carbon fiber reinforced epoxy resin laminates fabricated by self‐resistance electric heating

Zhang,

Zhao,

et al. 2024

Polymer Composites

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Self‐resistance electric (SRE) heating for the curing of carbon fiber reinforced plastic (CFRP) offers the benefits of saving energy consumption and reducing investment in equipment. In this work, the investigation was carried out to illustrate the effect of carbon nanotubes (CNTs) addition (0.5, 1.0, and 1.5 wt%) on the thermoset curing and mechanical properties of carbon fiber‐reinforced epoxy laminates fabricated by SRE heating method. The results show that adding CNTs can improve the temperature uniformity and interlayer‐resin flow during the SRE heating process and have a limited influence on the curing degree of CFRP composites. The tensile strength in the longitudinal direction of the composites increased with the increase of CNT addition. Meanwhile, the flexural strength and interlaminar shear strength had the maximum value with the CNTs content of 0.5 wt% and decreased significantly at the CNTs content of 1.5 wt%. It concludes that the appropriate content of CNTs addition has the potential to improve the thermoset curing performance and mechanical properties of the CFRP laminate composites fabricated by SRE heating.Highlights This study focuses on the effect of CNT addition on SRE heating for CFRP. The addition of CNTs improved the temperature uniformity during SRE heating. The addition of CNTs can reduce the voids of SRE‐cured CFRP composites. Threshold value of CNTs affected the mechanical performance of SRE‐cured CFRP.

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Section: Introductionmentioning

confidence: 99%

Effect of carbon nanotubes on thermoset curing and mechanical properties of carbon fiber reinforced epoxy resin laminates fabricated by self‐resistance electric heating

Zhang,

Zhao,

et al. 2024

Polymer Composites

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show abstract

“…To address the through-thickness temperature gradient of thick CFRP laminate, so far, the approaches of external thermal source (ETS) heating processes, [7] including autoclave, [8,9] oven, [10,11] or hot-molding [12] , were broadly investigated in the cure of thick CFRP laminates. The skin-core effect problem was theoretically unavoidable in these thermal-conduction-based methods.…”

Section: Introductionmentioning

confidence: 99%

Layered self‐resistance electric heating to cure thick carbon fiber reinforced epoxy laminates

Zhang

Liu

et al. 2021

Polymer Composites

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Curing of thick carbon fiber reinforced thermosetting composite laminates has been a major challenge due to the undesired through-thickness temperature gradient. In this paper, a novel layered self-resistance electric heating (L-SRE) method to cure thick laminates was proposed. The thick laminate was divided into multiple independent sub-layers, and the temperature of each sub-layer was controlled individually. The experiment's results revealed that L-SRE was able to achieve highly homogeneous temperature distribution filed throughthickness both in rapid heating and exothermic reaction stages. The maximum temperature difference of dwell stage for L-SRE process was less than 4.0 C, and the L-SRE process that had an optimized thickness of each sub-layer achieved the minimum mean temperature deviation of 2.1 C, which was 88.46% lower than that of the oven process. By using the optimized L-SRE method, the maximum value of crosslink thermal overshoot was 12.2 C (32.5 C for oven curing). Different layered temperature control strategies were explored, and the lowest energy consumption of 309.7 Wh (19.82% of oven process) was achieved by using the single-power pulsed heating. The method proposed in this paper provided a new solution for high-quality and energy-efficient curing of thick laminates.

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“…The properties of reinforcements play an important role in composites. By controlling the orientation and volume fraction of fibers, composites can achieve the desired dimensional stability and mechanical strength while being formed into complex geometrical components [ 2 , 3 , 4 , 5 , 6 ]. Another approach to obtain the desired or improved performance is through hybridization among different types of reinforcements.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Mechanical and Preforming Behaviors of Carbon-Kevlar Hybrid Woven Reinforcement

Gao

Zhang

et al. 2021

Polymers

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Carbon-Kevlar hybrid reinforcement is increasingly used in the domains that have both strength and anti-impact requirements. However, the research on the preforming behaviors of hybrid reinforcement is very limited. This paper aims to investigate the mechanical and preforming behaviors of carbon-Kevlar hybrid reinforcement. The results show that carbon-Kevlar hybrid woven reinforcement presents a unique “double-peak” tensile behavior, which is significantly different from that of single fiber type reinforcement, and the in-plane shear deformation demonstrates its large in-plane shear deformability. Both the tensile and in-plane shear behaviors present insensitivity to loading rate. In the preforming process, yarn slippage and out-of-plane yarn buckling are the two primary types of defects. Locations of these defects are closely related to the punch shape and the initial yarn direction. These defects cannot be alleviated or removed by just increasing the blank holder pressure. In the multi-layer preforming, the compaction between the plies and the friction between yarns simultaneously affect the quality of final preforms. The defect location of multi-layer preforms is the same as that of single-layer, while its defect range is much wider. The results found in this paper could provide useful guidance for the engineering application and preforming modeling of hybrid woven reinforcement.

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Prediction of the mechanical behavior of fiber-reinforced composite structure considering its shear angle distribution generated during thermo-compression molding process

Cited by 25 publications

References 27 publications

Effect of carbon nanotubes on thermoset curing and mechanical properties of carbon fiber reinforced epoxy resin laminates fabricated by self‐resistance electric heating

Effect of carbon nanotubes on thermoset curing and mechanical properties of carbon fiber reinforced epoxy resin laminates fabricated by self‐resistance electric heating

Layered self‐resistance electric heating to cure thick carbon fiber reinforced epoxy laminates

Analysis of the Mechanical and Preforming Behaviors of Carbon-Kevlar Hybrid Woven Reinforcement

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