Mechanical properties of glass/epoxy composites under artificial seawater environment: Numerical simulation and experimental validation

IF 4 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2024-07-26 DOI:10.1016/j.marstruc.2024.103679

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引用次数: 0

Abstract

In ocean engineering applications, glass fiber reinforced composite materials undergo degradation over time due to various aging processes. Accurately assessing the mechanical properties of these materials as they experience aging conditions in marine environment becomes a crucial factor. Although various approaches, such as experimental, theoretical, or finite element methods (FEM), have been employed to investigate the impact of aging processes on composite materials, limited attention has been given to examining the damage of composite plates under the exposure of artificial seawater environments using the MAT162 material model. The objective of this study is to outline a methodology for identifying a group of MAT162 parameters in LS-DYNA through a unit single element analysis. S2 glass/epoxy composites were produced by vacuum assisted resin infusion method. Aging was carried out in artificial seawater environment for 4, 8 and 12 months. Tensile, through thickness tensile, compression, through thickness compression tests were performed and then the finite element modeling was conducted. Maximum strength (X_1T, X_1C, X_3T and S_FC), element eroding axial strain (E_LIMT), modulus of elasticity (E₁ = E₂, E₃), scale factor for residual compressive strength (SFFC), coefficient for strain softening property (AM) parameters were analyzed. It was determined that the proposed model for aging was in good agreement with the experimental study.

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人工海水环境下玻璃/环氧树脂复合材料的机械性能：数值模拟和实验验证

在海洋工程应用中，玻璃纤维增强复合材料会因各种老化过程而随时间退化。准确评估这些材料在海洋环境中经历老化条件时的机械性能成为一个关键因素。虽然已经采用了实验、理论或有限元方法（FEM）等多种方法来研究老化过程对复合材料的影响，但使用 MAT162 材料模型来研究复合材料板在人工海水环境下的损坏情况的关注度还很有限。本研究的目的是通过单元单元素分析，概述在 LS-DYNA 中确定一组 MAT162 参数的方法。S2 玻璃/环氧树脂复合材料是通过真空辅助树脂灌注法生产的。在人工海水环境中分别进行了 4 个月、8 个月和 12 个月的老化。进行了拉伸、通厚拉伸、压缩、通厚压缩试验，然后进行了有限元建模。分析了最大强度（X1T、X1C、X3T 和 SFC）、元素侵蚀轴向应变（E_LIMT）、弹性模量（E1 = E2、E3）、残余抗压强度比例因子（SFFC）、应变软化特性系数（AM）等参数。结果表明，所提出的老化模型与实验研究结果十分吻合。

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.