An integrated modeling of AFP tow-drop defects and curing process of variable-stiffness thermoset composite laminates

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-10-09 DOI:10.1016/j.tws.2025.114064

Rutong Yang , Shengnan Zhang , Yingjie Xu , Weihong Zhang

{"title":"An integrated modeling of AFP tow-drop defects and curing process of variable-stiffness thermoset composite laminates","authors":"Rutong Yang , Shengnan Zhang , Yingjie Xu , Weihong Zhang","doi":"10.1016/j.tws.2025.114064","DOIUrl":null,"url":null,"abstract":"<div><div>This paper investigates the effects of tow-drop defects on the curing residual stress and deformation of variable-stiffness laminates. Tow-drop defects refer to small triangular resin-rich regions without fibers that are produced when tow overlaps are cut during the manufacturing of variable-stiffness thermoset composite laminates with curvilinear fiber paths using automated fiber placement (AFP) technology. An integrated modeling is proposed to incorporate the tow-drop defects into the curing process simulation. The geometric model of variable-stiffness laminates including tow-drop defects is established first. Thermal-chemical coupled and thermal-mechanical coupled analyses are then performed to reveal the evolution mechanism of curing residual stress and deformation. Influences of fiber orientation, tow width and tow number of the AFP process are further investigated. The results show that the tow-drop defects affect the curing quality of thermoset variable-stiffness composites. Especially, the lower tow width and higher tow number can greatly reduce the defects.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114064"},"PeriodicalIF":6.6000,"publicationDate":"2025-10-09","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/S026382312501153X","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

Abstract

This paper investigates the effects of tow-drop defects on the curing residual stress and deformation of variable-stiffness laminates. Tow-drop defects refer to small triangular resin-rich regions without fibers that are produced when tow overlaps are cut during the manufacturing of variable-stiffness thermoset composite laminates with curvilinear fiber paths using automated fiber placement (AFP) technology. An integrated modeling is proposed to incorporate the tow-drop defects into the curing process simulation. The geometric model of variable-stiffness laminates including tow-drop defects is established first. Thermal-chemical coupled and thermal-mechanical coupled analyses are then performed to reveal the evolution mechanism of curing residual stress and deformation. Influences of fiber orientation, tow width and tow number of the AFP process are further investigated. The results show that the tow-drop defects affect the curing quality of thermoset variable-stiffness composites. Especially, the lower tow width and higher tow number can greatly reduce the defects.

查看原文本刊更多论文

变刚度热固性复合材料层合板AFP拖降缺陷与固化过程的集成建模

研究了拖降缺陷对变刚度层合板固化残余应力和变形的影响。拖滴缺陷是指在使用自动纤维铺放（AFP）技术制造具有曲线纤维路径的变刚度热固性复合材料层压板时，在切割两束重叠时产生的没有纤维的小三角形富树脂区域。提出了一种将拖曳缺陷纳入固化过程仿真的集成建模方法。首先建立了含拖曳缺陷的变刚度层合板的几何模型。然后进行热化学耦合和热力学耦合分析，揭示了固化残余应力和变形的演化机制。进一步研究了纤维取向、纤维束宽度和纤维束数对AFP工艺的影响。结果表明：热固性变刚度复合材料的固化质量受到拖降缺陷的影响。特别是较低的拖束宽度和较高的拖束数可以大大减少缺陷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.