Influence of structured surface on the interlaminar delamination properties of bonded fiber-metal laminates

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-03-13 DOI:10.1016/j.tafmec.2025.104930

Xingyu Yang , Hao Liu , Yu Gong , Dingli Tian , Jianyu Zhang , Ning Hu

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引用次数: 0

Abstract

Fiber-metal laminates (FMLs) often exhibit weak interlayer mechanical properties. Delamination is a common issue across FMLs and significantly affects the overall mechanical performance, highlighting the critical need to enhance the interfacial bonding between metal and resin. Structured surface treatment has emerged as a promising method to improve interfacial bonding and has garnered significant attention in adhesive bonding applications. This study investigates the impact of surface structuring on delamination properties by designing two groove patterns (circular and hexagonal) on the metal surface of carbon fiber-reinforced aluminum alloy laminates (CARALL). Specimens were prepared and subsequently subjected to mode I and mode II static delamination tests. Test results indicate that both circular and hexagonal grooves substantially enhance interlaminar fracture toughness, with hexagonal grooves showing a superior improvement. Additionally, finite element models for double cantilever beam (DCB) and end-notched flexure (ENF) tests were developed using the cohesive zone model and progressive damage method. The numerical load–displacement curves were consistent with experimental curves, confirming the accuracy and applicability of the finite element approach.

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结构化表面对粘结纤维-金属层压板层间脱层特性的影响

金属纤维层压板（FMLs）往往表现出较弱的层间力学性能。分层是fml中常见的问题，严重影响整体机械性能，突出了加强金属和树脂之间界面结合的关键需求。结构表面处理已成为一种很有前途的改善界面粘合的方法，并在粘合剂粘合应用中引起了极大的关注。通过在碳纤维增强铝合金层压板（CARALL）金属表面设计两种凹槽图案（圆形和六角形），研究了表面结构对分层性能的影响。制备了样品，随后进行了I型和II型静态分层试验。试验结果表明，圆形槽和六角形槽均能显著提高层间断裂韧性，其中六角形槽的提高效果更好。此外，采用内聚区模型和渐进损伤法建立了双悬臂梁（DCB）和端缺口弯曲（ENF）试验的有限元模型。数值计算得到的载荷-位移曲线与试验曲线吻合较好，验证了有限元方法的准确性和适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.