Experimental and numerical characterization of E-glass/epoxy plain woven fabric composites containing void defects

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE Aerospace Science and Technology Pub Date : 2024-11-13 DOI:10.1016/j.ast.2024.109731

Nagappa Siddgonde , Vikas Kaushik , Anup Ghosh

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Abstract

The presence of voids in woven fabric composite (WFC) significantly affects the mechanical and thermomechanical properties. Void defects are introduced during the resin infiltration process due to various controlling parameters involved in the curing process, i.e., pressure, temperature, resin flow etc. In this study, the mechanical constants of 2D woven fabric composite were experimentally determined. A finite element (FE) based representative volume element (RVE) model has been validated against these experimental results. A multiscale-based FE model has been developed, and periodic boundary conditions are applied to the RVE model to evaluate the homogenized thermomechanical properties of WFC containing void defects. Present numerical model incorporates the geometrical microstructures of the post-cured woven composite and void contents obtained from X-ray microtomography. The influence of void defect and resin infiltration have been incorporated to evaluate the thermomechanical properties of plain WFC. A parametric study has been carried out with respect to the variation of void defects on thermoelastic properties of E-glass/epoxy plain WFC. The variation of void defects has been considered in micro and mesoscale models. Monte Carlo simulations further quantified the effects of void content on the thermomechanical constants of WFC. The presence of voids has been observed to have significant influences on the thermomechanical constants of yarn and woven fabric composites.

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含空隙缺陷的 E 玻璃/环氧平织布复合材料的实验和数值特性分析

编织物复合材料（WFC）中存在的空隙会严重影响其机械和热机械性能。由于固化过程中涉及到各种控制参数，如压力、温度、树脂流量等，在树脂浸润过程中会产生空隙缺陷。本研究通过实验确定了二维编织物复合材料的机械常数。根据这些实验结果验证了基于有限元（FE）的代表性体积元素（RVE）模型。开发了基于多矢量的 FE 模型，并将周期性边界条件应用于 RVE 模型，以评估含有空隙缺陷的 WFC 的均质化热力学特性。本数值模型结合了固化后编织复合材料的几何微观结构和 X 射线显微层析成像获得的空隙含量。空隙缺陷和树脂渗透的影响已被纳入评估普通 WFC 热机械性能的范围。就空隙缺陷对 E 玻璃/环氧树脂普通 WFC 热弹性性能的影响进行了参数研究。在微观和中观模型中考虑了空隙缺陷的变化。蒙特卡罗模拟进一步量化了空隙含量对 WFC 热力学常数的影响。据观察，空隙的存在对纱线和编织物复合材料的热力学常数有显著影响。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.