Enhancing composite joint performance through co-cure joining with structured low-melt polyaryletherketone (LMPAEK) meshes

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-19 DOI:10.1016/j.tws.2025.113187

Dong Quan , Jiaying Pan , Xuemin Wang , Mengmeng Han , Jiaming Liu , Guoqun Zhao

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引用次数: 0

Abstract

The use of thermoplastic films as alternatives to traditional thermoset adhesives for co-cure bonding of carbon fiber/epoxy composites offers a promising approach for joint fabrication. This technique has the potential to produce joints with enhanced structural integrity, addressing key limitations of thermoset adhesives, such as suboptimal thermal resistance, strict frozen storage requirements, and limited shelf life. In this study, thermoset composite joints were co-cure bonded using structured low-melt polyaryletherketone (LMPAEK) hollow meshes, with the thermoset/thermoplastic interface strengthened through a novel UV-irradiation process. Joint strength and fatigue life were evaluated through single-lap joint testing. The LMPAEK co-cured joints exhibited significantly improved structural integrity compared to those bonded with aerospace-grade thermoset adhesives under both quasi-static and fatigue loading conditions. This superior performance is attributed to extensive plastic deformation and controlled damage behavior within the LMPAEK resin. These characteristics, combined with LMPAEK’s advantageous properties, were key factors contributing to the remarkable lap-shear strength and fatigue resistance observed in the co-cured joints.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.