The tensile properties of adhesively bonded single lap joints with short kevlar fiber

IF 3.2 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives Pub Date : 2024-07-23 DOI:10.1016/j.ijadhadh.2024.103794

Shanshan Shi , Ziping Liu , Hangyu Lv , Xin Zhou , Zhi Sun , Bingzhi Chen

{"title":"The tensile properties of adhesively bonded single lap joints with short kevlar fiber","authors":"Shanshan Shi , Ziping Liu , Hangyu Lv , Xin Zhou , Zhi Sun , Bingzhi Chen","doi":"10.1016/j.ijadhadh.2024.103794","DOIUrl":null,"url":null,"abstract":"<div><p>In this paper, short Kevlar fiber was added to epoxy resin adhesive to form a short fiber toughened adhesive, and its effect on the static strength and elongation at break of Carbon fiber laminate adhesively bonded single lap joints was investigated. 1 wt%, 2 wt%, 3 wt% and 4 wt% short Kevlar fibers were added to make short fiber toughened adhesive joints to investigate the effects of different contents of short Kevlar fibers on the connecting properties of the test pieces of Carbon fiber laminate single lap adhesively bonded joints; In addition, microscopic toughening mechanism of short Kevlar fiber in adhesives revealed by combining DIC technique and SEM technique. The test results showed that the addition of appropriate amount of short Kevlar fiber could slow down the crack extension compared with the without toughening specimens, but the toughening effect was weakened by excessive content. 2 wt% short Kevlar fiber toughened specimens achieved the best toughening effect, with 30.52 % increase in peak load and 25.78 % increase in elongation in tensile test. The combination of DIC and SEM further showed that short Kevlar fiber toughened joints absorb crack strain energy through fiber-bridging thus increasing adhesive properties.</p></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"134 ","pages":"Article 103794"},"PeriodicalIF":3.2000,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Adhesion and Adhesives","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0143749624001763","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

In this paper, short Kevlar fiber was added to epoxy resin adhesive to form a short fiber toughened adhesive, and its effect on the static strength and elongation at break of Carbon fiber laminate adhesively bonded single lap joints was investigated. 1 wt%, 2 wt%, 3 wt% and 4 wt% short Kevlar fibers were added to make short fiber toughened adhesive joints to investigate the effects of different contents of short Kevlar fibers on the connecting properties of the test pieces of Carbon fiber laminate single lap adhesively bonded joints; In addition, microscopic toughening mechanism of short Kevlar fiber in adhesives revealed by combining DIC technique and SEM technique. The test results showed that the addition of appropriate amount of short Kevlar fiber could slow down the crack extension compared with the without toughening specimens, but the toughening effect was weakened by excessive content. 2 wt% short Kevlar fiber toughened specimens achieved the best toughening effect, with 30.52 % increase in peak load and 25.78 % increase in elongation in tensile test. The combination of DIC and SEM further showed that short Kevlar fiber toughened joints absorb crack strain energy through fiber-bridging thus increasing adhesive properties.

查看原文本刊更多论文

带有短凯夫拉纤维的粘合单搭接接头的拉伸性能

本文在环氧树脂粘合剂中加入短凯夫拉纤维以形成短纤维增韧粘合剂，并研究了其对碳纤维层压板粘合单搭接接头的静态强度和断裂伸长率的影响。在短纤维增韧胶粘剂接头中分别添加 1 wt%、2 wt%、3 wt% 和 4 wt% 的短 Kevlar 纤维，研究不同含量的短 Kevlar 纤维对碳纤维层压板单搭接粘接接头试件连接性能的影响；并结合 DIC 技术和 SEM 技术，揭示了短 Kevlar 纤维在胶粘剂中的微观增韧机理。试验结果表明，与未增韧的试样相比，添加适量的短 Kevlar 纤维可减缓裂纹的扩展，但过量的短 Kevlar 纤维会削弱增韧效果。2 wt% 短 Kevlar 纤维增韧试样的增韧效果最好，在拉伸试验中峰值载荷增加了 30.52 %，伸长率增加了 25.78 %。DIC 和 SEM 的结合进一步表明，短 Kevlar 纤维增韧接头通过纤维桥接吸收裂纹应变能，从而提高了粘合性能。

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

International Journal of Adhesion and Adhesives 工程技术-材料科学：综合

CiteScore

6.90

自引率

8.80%

发文量

200

审稿时长

8.3 months

期刊介绍： The International Journal of Adhesion and Adhesives draws together the many aspects of the science and technology of adhesive materials, from fundamental research and development work to industrial applications. Subject areas covered include: interfacial interactions, surface chemistry, methods of testing, accumulation of test data on physical and mechanical properties, environmental effects, new adhesive materials, sealants, design of bonded joints, and manufacturing technology.