一种新的研究z销扭转对复合材料层间性能影响机理的数值模拟方法

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-04 DOI:10.1016/j.tws.2025.113271

Zhi Li , Huijie Lin , Yongliang Zhang , Han Wang , Haijin Wang , Yunbo Bi

{"title":"一种新的研究z销扭转对复合材料层间性能影响机理的数值模拟方法","authors":"Zhi Li , Huijie Lin , Yongliang Zhang , Han Wang , Haijin Wang , Yunbo Bi","doi":"10.1016/j.tws.2025.113271","DOIUrl":null,"url":null,"abstract":"<div><div>In order to investigate the effects of Z-pin twist (λ) and deflection angle (θ) on the bridging performance and interlaminar fracture toughness of composite laminates, and to reveal the underlying failure mechanisms, this study proposes a novel numerical modeling procedure, which includes pull-out tests, double cantilever beam (DCB) tests and three-point end-notched flexure (ENF) tests. The model uses a regular quadrilateral arrangement to construct fiber bundles and simplifies the twisted Z-pin as a cylindrical shell composed of twisted fiber bundles and the surrounding resin matrix. Cohesive elements are inserted to simulate resin matrix failure, Z-pin splitting failure and fracture failure. The reliability of the model is verified through comparison with experimental results. The study shows that as λ increases and θ decreases, the peak pull-out load of the Z-pin reinforced laminate gradually increases. Meanwhile, increases in λ and θ significantly enhance the critical mode I (G<sub>IC</sub>) and mode II (G<sub>IIC</sub>) interlaminar fracture toughness. When λ = 60 n/m and θ = 60°, G<sub>IC</sub> is 4764.75 J/m<sup>2</sup>, which is 6.78 times greater than that of the blank specimen. And G<sub>IIC</sub> is 1889.3 J/m<sup>2</sup>, showing a 61.3 % improvement. Furthermore, the Z-pin effectively enhances the local mechanical properties of the laminates. This study provides valuable guidance for the optimized design of Z-pin reinforced composite laminates.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113271"},"PeriodicalIF":5.7000,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A novel numerical modeling procedure for investigating effect mechanism of Z-pin twist on interlayer properties of composite laminates\",\"authors\":\"Zhi Li , Huijie Lin , Yongliang Zhang , Han Wang , Haijin Wang , Yunbo Bi\",\"doi\":\"10.1016/j.tws.2025.113271\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In order to investigate the effects of Z-pin twist (λ) and deflection angle (θ) on the bridging performance and interlaminar fracture toughness of composite laminates, and to reveal the underlying failure mechanisms, this study proposes a novel numerical modeling procedure, which includes pull-out tests, double cantilever beam (DCB) tests and three-point end-notched flexure (ENF) tests. The model uses a regular quadrilateral arrangement to construct fiber bundles and simplifies the twisted Z-pin as a cylindrical shell composed of twisted fiber bundles and the surrounding resin matrix. Cohesive elements are inserted to simulate resin matrix failure, Z-pin splitting failure and fracture failure. The reliability of the model is verified through comparison with experimental results. The study shows that as λ increases and θ decreases, the peak pull-out load of the Z-pin reinforced laminate gradually increases. Meanwhile, increases in λ and θ significantly enhance the critical mode I (G<sub>IC</sub>) and mode II (G<sub>IIC</sub>) interlaminar fracture toughness. When λ = 60 n/m and θ = 60°, G<sub>IC</sub> is 4764.75 J/m<sup>2</sup>, which is 6.78 times greater than that of the blank specimen. And G<sub>IIC</sub> is 1889.3 J/m<sup>2</sup>, showing a 61.3 % improvement. Furthermore, the Z-pin effectively enhances the local mechanical properties of the laminates. This study provides valuable guidance for the optimized design of Z-pin reinforced composite laminates.</div></div>\",\"PeriodicalId\":49435,\"journal\":{\"name\":\"Thin-Walled Structures\",\"volume\":\"213 \",\"pages\":\"Article 113271\"},\"PeriodicalIF\":5.7000,\"publicationDate\":\"2025-04-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Thin-Walled Structures\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0263823125003659\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CIVIL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin-Walled Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263823125003659","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

摘要

为了研究z销扭转（λ）和挠度角（θ）对复合材料层合板的桥接性能和层间断裂韧性的影响，揭示其破坏机制，本文提出了一种新的数值模拟方法，包括拉拔试验、双悬臂梁（DCB）试验和三点端缺口弯曲（ENF）试验。该模型采用规则的四边形排列方式构建纤维束，并将扭曲的Z-pin简化为由扭曲的纤维束和周围的树脂基体组成的圆柱形外壳。插入内聚元素模拟树脂基体破坏、z销劈裂破坏和断裂破坏。通过与实验结果的对比，验证了模型的可靠性。研究表明，随着λ的增大和θ的减小，z针增强层合板的峰值拉拔载荷逐渐增大。同时，λ和θ的增加显著提高了临界I型（GIC）和临界II型（GIIC）的层间断裂韧性。当λ = 60 n/m, θ = 60°时，GIC为4764.75 J/m2，是空白试样的6.78倍。GIIC为1889.3 J/m2，提高了61.3%。此外，Z-pin有效地提高了层合板的局部力学性能。该研究为z销增强复合材料层合板的优化设计提供了有价值的指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

A novel numerical modeling procedure for investigating effect mechanism of Z-pin twist on interlayer properties of composite laminates

In order to investigate the effects of Z-pin twist (λ) and deflection angle (θ) on the bridging performance and interlaminar fracture toughness of composite laminates, and to reveal the underlying failure mechanisms, this study proposes a novel numerical modeling procedure, which includes pull-out tests, double cantilever beam (DCB) tests and three-point end-notched flexure (ENF) tests. The model uses a regular quadrilateral arrangement to construct fiber bundles and simplifies the twisted Z-pin as a cylindrical shell composed of twisted fiber bundles and the surrounding resin matrix. Cohesive elements are inserted to simulate resin matrix failure, Z-pin splitting failure and fracture failure. The reliability of the model is verified through comparison with experimental results. The study shows that as λ increases and θ decreases, the peak pull-out load of the Z-pin reinforced laminate gradually increases. Meanwhile, increases in λ and θ significantly enhance the critical mode I (G_IC) and mode II (G_IIC) interlaminar fracture toughness. When λ = 60 n/m and θ = 60°, G_IC is 4764.75 J/m², which is 6.78 times greater than that of the blank specimen. And G_IIC is 1889.3 J/m², showing a 61.3 % improvement. Furthermore, the Z-pin effectively enhances the local mechanical properties of the laminates. This study provides valuable guidance for the optimized design of Z-pin reinforced composite laminates.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

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.