Repair mechanism and performance restoration of CFRTP/metal bolted joints via resin thermal reshaping

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-03-27 DOI:10.1016/j.compstruct.2025.119138

Guangwu Zhang , Yunjing Zhao , Chen Wang , Gang Li

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引用次数: 0

Abstract

In this study, a joint repair method by resin thermal reshaping is introduced to repair damaged carbon fiber reinforced thermoplastic (CFRTP) bolted joints. A metal insert at the resin melting temperature is inserted into the damaged CFRTP hole with interference fit during the repair process. The matrix resin melts and fills the gap caused by the damage under the action of temperature and pressure. This process results in a densified joint structure, significantly restoring the mechanical properties and overall structural integrity of the joint. Joints with varying degrees of damage are designed, and the proposed repair method is applied. Single shear joints are prepared and subjected to quasi-static tensile and cyclic loading tests, with the interface observed using optical microscopy. Experimental results show that resin thermal reshaping significantly enhances the repair performance of damaged joints, with a 15.20 % increase in tensile load and a 32.90 % reduction in hole elongation. Finite element simulations further confirm these results and successfully replicate key feature points in the load–displacement curve.

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.