Enhancing the interlaminar toughness and impact resistance of CFRP using MWCNTs and core-shell rubber synergistic strategy

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-04 DOI:10.1016/j.tws.2025.113146

Guojun Zhao, Xiaoyu Zhang, Wei Qiang, Xin Zhang

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引用次数: 0

Abstract

Enhancing the toughness and impact resistance of composite materials is becoming increasingly important. This study investigates the effects of multi-walled carbon nanotubes (MWCNTs) and core-shell rubber (CSR) particles on the mechanical properties and interlaminar fracture toughness of epoxy resin-based carbon fiber-reinforced polymer (CFRP) composites. The synergistic toughening mechanisms are explored through scanning electron microscopy and non-destructive testing. Results show that incorporating CSR individually reduces the modulus and maximum stress of epoxy resin but significantly enhances its fracture toughness by 82% when it is hybrid with MWCNTs synergistically. The hybrid modification of MWCNTs and CSR in CFRP laminates exhibited superior interlaminar toughening efficiency, with values increasing by 149% in mode I fracture and 80% in mode II fracture. These results demonstrate that CSR activates more MWCNTs in the resin, significantly improving the interlaminar fracture toughness of CFRP laminates. Furthermore, the hybrid-modified CFRP laminates effectively mitigated barely visible impact damage (5 J) and maintained damage resistance under higher energy impacts (up to 20 J), demonstrating enhanced impact tolerance, and showing remarkable resistance to damage evolution.

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提高复合材料的韧性和抗冲击性正变得越来越重要。本研究探讨了多壁碳纳米管（MWCNTs）和芯壳橡胶（CSR）颗粒对环氧树脂基碳纤维增强聚合物（CFRP）复合材料的机械性能和层间断裂韧性的影响。通过扫描电子显微镜和非破坏性测试探索了协同增韧机制。结果表明，单独加入 CSR 会降低环氧树脂的模量和最大应力，但与 MWCNTs 协同混合后，环氧树脂的断裂韧性会显著提高 82%。在 CFRP 层板中混合改性 MWCNTs 和 CSR 后，层间增韧效率更高，在模式 I 断裂中的增韧值提高了 149%，在模式 II 断裂中提高了 80%。这些结果表明，CSR 能激活树脂中更多的 MWCNTs，从而显著提高 CFRP 层压板的层间断裂韧性。此外，混合改性 CFRP 层压板有效减轻了几乎不可见的冲击损伤（5 J），并在更高能量的冲击（高达 20 J）下保持了抗损伤性，显示出更强的冲击耐受性，以及显著的抗损伤演化能力。

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

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.