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Resin Capacity of Technical Woven Fabrics: Pore Volume and Pore Shape Simulation

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Abstract

Nowadays, technical woven fabrics are broadly utilized as reinforcement of composites. Resin capacity of woven fabric is one of the main challenges in laminate fabrication. Resin diffusion during fabrication of the composite is extremely depended on fabric micro-morphology. The geometry of weave unit cell and its pore are fundamental factors in evaluating resin capacity and resin diffusion within fabrics. The main attempt of this study was obtaining an approach to evaluate resin capacity of a woven fabric via simulating pore shape and pore volume. For this purpose, four basic unit cells for all kind of weaves were simulated with the two shapes of tow cross-section: lens and racetrack. Afterwards, 3D shape and volume of their pores were simulated using this approach. The proposed approach is established on the base of initial data of fabric such as tow setts, tow titers, planar density and thickness of a technical fabric. To assess the simulation, three types of woven fabrics namely, plain, twill and satin were impregnated by epoxy resin using vacuum infusion process. The volume fractions of the matrix and fibers of real composites were compared with simulated ones. It was demonstrated that the approach with racetrack assumption led to high degree of convergence with experimental results. The maximum relative error of pioneered method to evaluate volume of the pore in this condition exceeded up to 1.43 %. Suitable correlation between volume fractions of the pore and void was observed in experimental data. It is experimentally demonstrated that the void volume fraction of composite will be increased with decrease of pore volume due to difficulty of wetting. In this paper, it is illustrated that the resin capacity of a woven fabric is a function of vacuum level in vacuum infusion process. For instance, resin capacity of a certain plain fabric could be reduced up to 10 % under 60 kPa (0.6 bar) of vacuum in contrast with steady state of fabric at room atmosphere.

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Acknowledgement

We would like to thank Dr. Abolfazl Zare Shah Abadi (Assistant professor of mechanic engineering in Islamic Azad university-Yazd branch) for his contribution during the simulations.

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Authors and Affiliations

  1. Department of Textile Engineering, Science and Research Branch, Islamic Azad University, Tehran, 1477893855, Iran

    Hamid Reza Sharafat & Mehdi Kamali Dolatabadi

  2. Departmentof Textile Engineering, Amir Kabir University of Technology, Tehran, 1591634311, Iran

    Ali. A. A. Jeddi

Authors
  1. Hamid Reza Sharafat
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  2. Mehdi Kamali Dolatabadi
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  3. Ali. A. A. Jeddi
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Correspondence to Mehdi Kamali Dolatabadi.

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Sharafat, H.R., Dolatabadi, M.K. & Jeddi, A.A.A. Resin Capacity of Technical Woven Fabrics: Pore Volume and Pore Shape Simulation. Fibers Polym 21, 2664–2674 (2020). https://doi.org/10.1007/s12221-020-9485-8

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  • DOI: https://doi.org/10.1007/s12221-020-9485-8

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