Shuyan Nie , Kunyong Guo , Yuanhao Tian , Liming Chen , Zhaoxin Yun , Xin Pan , Weiguo Li , Jie Wang , Xianbo Hou , Shaowei Zhu , Tao Liu , Zhenhua Song
{"title":"Experimental study on the mechanical and thermal properties of PEEK, CF/PEEK, and GF/PEEK thin-walled cylinders under static compressive tests","authors":"Shuyan Nie , Kunyong Guo , Yuanhao Tian , Liming Chen , Zhaoxin Yun , Xin Pan , Weiguo Li , Jie Wang , Xianbo Hou , Shaowei Zhu , Tao Liu , Zhenhua Song","doi":"10.1016/j.tws.2025.113032","DOIUrl":null,"url":null,"abstract":"<div><div>Polyether ether ketone (PEEK) and its fiber reinforced composite thin-walled tube structures (TWCs) are widely used in engineering, but their mechanical properties under thermal conditions are rarely reported. In this paper, the static compressive mechanical properties of PEEK-TWCS, short glass fiber reinforced PEEK TWCS (GF/PEEK-TWCS) and short carbon fiber reinforced PEEK TWCS (CF/PEEK-TWCS) at 20 ℃ and 170 ℃ were investigated experimentally. The outcomes underscore that the compressive strength, specific energy absorption and stiffness of the cylinders are significant sensitive to temperature, with PEEK-TWCS demonstrating the highest sensitivity, exhibiting a reduction of over 75 % at 170 °C. Comparatively, the reinforcing effects of carbon fibers and glass fibers are markedly pronounced at 170 °C, substantially ameliorating the mechanical performance of the cylindrical structures. Utilizing a 3D-Digital Image Correlation (DIC) optical strain measurement system, an inhomogeneous strain distribution in the elastic phase was observed for all materials, with increasing compression, a buckling half-wave formed, leading to localized buckling. According to the micro-nano electron computed tomography scanner (Nano-CT), the plasticity of GF/PEEK-TWCS is better than that of CF/PEEK-TWCS and PEEK-TWCS at 20 °C. In addition, microscopic fracture surface analysis revealed that the ductile matrix behavior in CF/PEEK, juxtaposed with brittle fiber fracture, indicative of interface damage and fiber pull-out. In contrast, PEEK displayed brittle fracture characteristics. This research provides support for the temperature-dependent mechanical behavior of PEEK-based composites, offering a foundation for the development of advanced materials for high-temperature applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"210 ","pages":"Article 113032"},"PeriodicalIF":5.7000,"publicationDate":"2025-01-30","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/S0263823125001260","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
Polyether ether ketone (PEEK) and its fiber reinforced composite thin-walled tube structures (TWCs) are widely used in engineering, but their mechanical properties under thermal conditions are rarely reported. In this paper, the static compressive mechanical properties of PEEK-TWCS, short glass fiber reinforced PEEK TWCS (GF/PEEK-TWCS) and short carbon fiber reinforced PEEK TWCS (CF/PEEK-TWCS) at 20 ℃ and 170 ℃ were investigated experimentally. The outcomes underscore that the compressive strength, specific energy absorption and stiffness of the cylinders are significant sensitive to temperature, with PEEK-TWCS demonstrating the highest sensitivity, exhibiting a reduction of over 75 % at 170 °C. Comparatively, the reinforcing effects of carbon fibers and glass fibers are markedly pronounced at 170 °C, substantially ameliorating the mechanical performance of the cylindrical structures. Utilizing a 3D-Digital Image Correlation (DIC) optical strain measurement system, an inhomogeneous strain distribution in the elastic phase was observed for all materials, with increasing compression, a buckling half-wave formed, leading to localized buckling. According to the micro-nano electron computed tomography scanner (Nano-CT), the plasticity of GF/PEEK-TWCS is better than that of CF/PEEK-TWCS and PEEK-TWCS at 20 °C. In addition, microscopic fracture surface analysis revealed that the ductile matrix behavior in CF/PEEK, juxtaposed with brittle fiber fracture, indicative of interface damage and fiber pull-out. In contrast, PEEK displayed brittle fracture characteristics. This research provides support for the temperature-dependent mechanical behavior of PEEK-based composites, offering a foundation for the development of advanced materials for high-temperature applications.
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
