A systematic review of stress concentration factors (SCFs) in composite reinforced circular hollow section (CHS) joints

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES
Mohsin Iqbal , Saravanan Karuppanan , Veeradasan Perumal , Mark Ovinis , Muhammad Iqbal
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引用次数: 0

Abstract

"Composites are an emerging choice for strengthening and repairing compromised structures due to their attractive mechanical properties, environmental durability, and ease of application. After decades of successful use as environmental coatings and for strengthening secondary load members, and with advancements in materials and application techniques, composites are increasingly being used for primary load-bearing components, such as the joints of circular hollow section (CHS) members. The structural stress approach is widely used for the fatigue analysis of CHS joints. This approach utilises stress concentration factors (SCFs) in the joint to determine hot-spot stress, which is then used in conjunction with the respective S-N curve for fatigue life estimation. Composite reinforcement of CHS joints is increasingly being investigated to enhance fatigue life. Various studies have reported a positive impact of composite reinforcement on fatigue strength, either directly or by reducing SCFs in CHS joints. However, certain aspects remain unexplored, while others are frequently revisited. The use of composites for reinforcing tubular joints is systematically reviewed following PRISMA guidelines. Twenty-four articles were selected for detailed study after applying various exclusion and inclusion criteria and removing duplicate records, with eleven, five, three, four, and one articles on T/Y, K, KT, X, and TT-joints, respectively. A critical review of these articles shaped the current understanding of the capabilities of composite reinforcement in CHS joints for enhancing fatigue life and identified areas for future research. These gaps include the investigation of composite reinforcement for joints under combined loads, the optimisation of reinforcement layup, and the development of empirical equations for determining SCFs in various joints under different load configurations."
复合材料加固圆形空心截面 (CHS) 接头应力集中系数 (SCF) 系统性审查
"复合材料因其极具吸引力的机械性能、环境耐久性和易于应用,成为加固和修复受损结构的新兴选择。几十年来,复合材料成功地用作环境涂层和加固次要承重构件,随着材料和应用技术的进步,复合材料正越来越多地用于主要承重构件,如圆形空心截面(CHS)构件的连接处。结构应力法被广泛用于 CHS 接头的疲劳分析。这种方法利用接头中的应力集中系数(SCF)来确定热点应力,然后结合相应的 S-N 曲线来估算疲劳寿命。为了提高疲劳寿命,对 CHS 接头进行复合加固的研究越来越多。各种研究都报告了复合材料加固对疲劳强度的积极影响,无论是直接影响还是通过降低 CHS 接头中的 SCF 来影响。然而,某些方面仍未得到探索,而其他方面则经常被重新审视。本文按照 PRISMA 指南对使用复合材料加固管状接头的情况进行了系统综述。在采用各种排除和纳入标准并删除重复记录后,共筛选出 24 篇文章进行详细研究,其中分别有 11 篇、5 篇、3 篇、4 篇和 1 篇关于 T/Y、K、KT、X 和 TT 接头的文章。通过对这些文章的严格审查,我们了解了目前在 CHS 接头中使用复合材料加固以提高疲劳寿命的能力,并确定了未来的研究领域。这些不足之处包括对组合载荷下接头复合材料加固的研究、加固层的优化以及用于确定不同载荷配置下各种接头 SCF 的经验公式的开发。
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
Composites Part C Open Access
Composites Part C Open Access Engineering-Mechanical Engineering
CiteScore
8.60
自引率
2.40%
发文量
96
审稿时长
55 days
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