Liangdi Wang , Jun Wang , Yingjie Xu , Yanlong Liu , Xuebei Teng , Jihong Zhu , Weihong Zhang
{"title":"Experiments and simulations on the impact resistance of superelastic shape memory alloy reinforced composites","authors":"Liangdi Wang , Jun Wang , Yingjie Xu , Yanlong Liu , Xuebei Teng , Jihong Zhu , Weihong Zhang","doi":"10.1016/j.tws.2025.112977","DOIUrl":null,"url":null,"abstract":"<div><div>Carbon fiber reinforced polymer (CFRP) composites are highly valued for their excellent specific strength and stiffness. However, CFRP is vulnerable to impact damage, which is often unavoidable in practical applications. This study investigates the enhancement of impact resistance in CFRP composites through the incorporation of superelastic shape memory alloy (SMA) wires into the CFRP matrix. Unidirectional and bidirectional SMA-reinforced CFRP laminates were fabricated and subjected to low-velocity impact testing. The surface and internal interlaminar damage patterns of the laminates were observed through a combination of visual inspection and ultrasonic C-scan imaging. The impact response of the laminates was analyzed by examining the time-varying curves of impact force and impact point displacement. The results indicate that SMA-reinforced CFRP (SMA-CFRP) demonstrates shallower delamination cracks and reduced interlaminar damage after impact. The maximum impact force of the unidirectional and bidirectional SMA-reinforced CFRP increased by 26.1 % and 29.5 %, respectively, indicating a significant enhancement in the matrix stiffness after the incorporation of SMA. The mechanical mechanisms behind the improved impact resistance were further investigated through simulation analysis, the importance of SMA phase transformation in the energy absorption process during impact was highlighted. The results of the parametric analysis indicate that reducing the spacing or introducing pre-stress of SMA wires contributes to a slight improvement in impact resistance. This study offers new insights for the design and optimization of impact-resistant composites.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"210 ","pages":"Article 112977"},"PeriodicalIF":5.7000,"publicationDate":"2025-01-22","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/S0263823125000710","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
碳纤维增强聚合物（CFRP）复合材料因其出色的比强度和刚度而备受推崇。然而，CFRP 很容易受到冲击损坏，这在实际应用中往往是不可避免的。本研究探讨了通过在 CFRP 基体中加入超弹性形状记忆合金（SMA）丝来增强 CFRP 复合材料的抗冲击性。研究人员制作了单向和双向 SMA 增强 CFRP 层压板，并对其进行了低速冲击测试。通过目视检查和超声波 C 扫描成像相结合的方法，观察了层压板的表面和内部层间损伤模式。通过检查冲击力和冲击点位移的时变曲线，分析了层压板的冲击响应。结果表明，SMA 增强 CFRP（SMA-CFRP）在受到冲击后会出现较浅的分层裂缝，层间损伤也会减少。单向和双向 SMA 增强 CFRP 的最大冲击力分别增加了 26.1% 和 29.5%，表明加入 SMA 后基体刚度显著增强。通过模拟分析进一步研究了抗冲击性能提高背后的力学机理，突出了 SMA 相变在冲击过程中能量吸收过程中的重要性。参数分析结果表明，减小 SMA 线的间距或引入预应力可略微提高抗冲击性。这项研究为抗冲击复合材料的设计和优化提供了新的见解。
Experiments and simulations on the impact resistance of superelastic shape memory alloy reinforced composites
Carbon fiber reinforced polymer (CFRP) composites are highly valued for their excellent specific strength and stiffness. However, CFRP is vulnerable to impact damage, which is often unavoidable in practical applications. This study investigates the enhancement of impact resistance in CFRP composites through the incorporation of superelastic shape memory alloy (SMA) wires into the CFRP matrix. Unidirectional and bidirectional SMA-reinforced CFRP laminates were fabricated and subjected to low-velocity impact testing. The surface and internal interlaminar damage patterns of the laminates were observed through a combination of visual inspection and ultrasonic C-scan imaging. The impact response of the laminates was analyzed by examining the time-varying curves of impact force and impact point displacement. The results indicate that SMA-reinforced CFRP (SMA-CFRP) demonstrates shallower delamination cracks and reduced interlaminar damage after impact. The maximum impact force of the unidirectional and bidirectional SMA-reinforced CFRP increased by 26.1 % and 29.5 %, respectively, indicating a significant enhancement in the matrix stiffness after the incorporation of SMA. The mechanical mechanisms behind the improved impact resistance were further investigated through simulation analysis, the importance of SMA phase transformation in the energy absorption process during impact was highlighted. The results of the parametric analysis indicate that reducing the spacing or introducing pre-stress of SMA wires contributes to a slight improvement in impact resistance. This study offers new insights for the design and optimization of impact-resistant composites.
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.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
