The investigation of deflection behavior in carbon/epoxy and glass/epoxy composite laminates under low-velocity impact with small projectiles

IF 2.3 3区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Journal of Composite Materials Pub Date : 2024-05-31 DOI:10.1177/00219983241256334

Mohammad Javad Ramezani

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Abstract

This study examined the impact behavior of carbon/epoxy and glass/epoxy composite laminates with 2, 4, and 6 mm thicknesses under low-velocity tests. The investigation involved subjecting the composite laminates under small-impact loads using spherical, cylindrical, and conical steel projectiles, each weighing 3 g. The impacts conducted at 29.5, 36.5, and 51 m/s velocities. This investigation modeled using finite element (FE) methods and analytical approaches. In the analytical method, the mass and spring model used for the impact of small projectiles. The research findings revealed that, in 2 mm thick carbon/epoxy composite laminates, the maximum deflection at the mid-point induced by a spherical projectile was 1.37 mm. This value exhibited a 48.91% and 19.13% increase compared to impacts with cylindrical and conical projectiles, respectively. Additionally, a comprehensive examination of delamination across all samples indicated the maximum delamination occurrence in glass/epoxy samples, showcasing lower impact resistance than carbon/epoxy laminates. Notably, with an increase in thickness, the delamination phenomenon in the samples exhibited a decreasing trend. In addition, the maximum value of delamination in the composite laminates were with spherical, conical, and cylindrical projectiles respectively, and also, there was an excellent convergence between FE and analytical results.

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碳/环氧和玻璃/环氧复合材料层压板在小弹丸低速冲击下的变形行为研究

本研究考察了厚度为 2、4 和 6 毫米的碳/环氧和玻璃/环氧复合材料层压板在低速试验下的冲击行为。研究使用球形、圆柱形和圆锥形钢制弹丸（每个重 3 克）对复合材料层压板施加小冲击载荷，冲击速度分别为 29.5、36.5 和 51 米/秒。这项研究使用有限元（FE）方法和分析方法进行建模。在分析方法中，质量和弹簧模型用于小型弹丸的冲击。研究结果表明，在 2 毫米厚的碳/环氧复合材料层压板中，球形弹丸在中点引起的最大挠度为 1.37 毫米。与圆柱形和圆锥形弹丸相比，该值分别增加了 48.91% 和 19.13%。此外，对所有样品的分层情况进行的全面检查表明，玻璃/环氧样品的分层情况最为严重，其抗冲击性低于碳/环氧层压板。值得注意的是，随着厚度的增加，样品中的分层现象呈下降趋势。此外，复合材料层压板的最大分层值分别出现在球形、圆锥形和圆柱形弹丸上，而且 FE 与分析结果的收敛性非常好。

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来源期刊

Journal of Composite Materials 工程技术-材料科学：复合

CiteScore

5.40

自引率

6.90%

发文量

274

审稿时长

6.8 months

期刊介绍： Consistently ranked in the top 10 of the Thomson Scientific JCR, the Journal of Composite Materials publishes peer reviewed, original research papers from internationally renowned composite materials specialists from industry, universities and research organizations, featuring new advances in materials, processing, design, analysis, testing, performance and applications. This journal is a member of the Committee on Publication Ethics (COPE).