Fatigue of polyacrylonitrile (PAN) carbon fiber monofilaments

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2024-12-29 DOI:10.1016/j.ijfatigue.2024.108801

Peipei Yan, Hongyun Luo, Shuang Zhao, Lin Li, Zihua Zhao

{"title":"Fatigue of polyacrylonitrile (PAN) carbon fiber monofilaments","authors":"Peipei Yan, Hongyun Luo, Shuang Zhao, Lin Li, Zihua Zhao","doi":"10.1016/j.ijfatigue.2024.108801","DOIUrl":null,"url":null,"abstract":"As a high-strength and high-modulus fiber, carbon fiber is widely used in the reinforcement of advanced composite materials, which will suffer fatigue when subjected to cyclic loading with stress lower than tensile strength. However, the testing of the fatigue properties of monofilament carbon fibers presents a significant challenge due to the lack of effective testing methods for such micron-scale brittle fibers. Herein, we used a self-excited vibration principle fatigue device to investigate the fatigue behavior of carbon fiber monofilament (T800) by applying cyclic bidirectional bending. At a stress of 1041 MPa, the fiber exhibited a fatigue life exceeding 10<ce:sup loc=\"post\">7</ce:sup> cycles and a fatigue resistance of 19 % of its tensile strength. With progressive damage on both sides of the fiber surface, bidirectional cracks initiate at the fiber surfaces and coalesce to the middle region accompanied by flat crack growth regions. In addition, the vibration frequency decreases significantly with the increasing fatigue life indicating the slow crack growth, while molecular dynamic simulations further reveal the accumulation of atomic fracture indicating the progressive damage mechanism during the fatigue process.","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"498 1","pages":""},"PeriodicalIF":5.7000,"publicationDate":"2024-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Fatigue","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.ijfatigue.2024.108801","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

As a high-strength and high-modulus fiber, carbon fiber is widely used in the reinforcement of advanced composite materials, which will suffer fatigue when subjected to cyclic loading with stress lower than tensile strength. However, the testing of the fatigue properties of monofilament carbon fibers presents a significant challenge due to the lack of effective testing methods for such micron-scale brittle fibers. Herein, we used a self-excited vibration principle fatigue device to investigate the fatigue behavior of carbon fiber monofilament (T800) by applying cyclic bidirectional bending. At a stress of 1041 MPa, the fiber exhibited a fatigue life exceeding 107 cycles and a fatigue resistance of 19 % of its tensile strength. With progressive damage on both sides of the fiber surface, bidirectional cracks initiate at the fiber surfaces and coalesce to the middle region accompanied by flat crack growth regions. In addition, the vibration frequency decreases significantly with the increasing fatigue life indicating the slow crack growth, while molecular dynamic simulations further reveal the accumulation of atomic fracture indicating the progressive damage mechanism during the fatigue process.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal of Fatigue 工程技术-材料科学：综合

CiteScore

10.70

自引率

21.70%

发文量

619

审稿时长

58 days

期刊介绍： Typical subjects discussed in International Journal of Fatigue address: Novel fatigue testing and characterization methods (new kinds of fatigue tests, critical evaluation of existing methods, in situ measurement of fatigue degradation, non-contact field measurements) Multiaxial fatigue and complex loading effects of materials and structures, exploring state-of-the-art concepts in degradation under cyclic loading Fatigue in the very high cycle regime, including failure mode transitions from surface to subsurface, effects of surface treatment, processing, and loading conditions Modeling (including degradation processes and related driving forces, multiscale/multi-resolution methods, computational hierarchical and concurrent methods for coupled component and material responses, novel methods for notch root analysis, fracture mechanics, damage mechanics, crack growth kinetics, life prediction and durability, and prediction of stochastic fatigue behavior reflecting microstructure and service conditions) Models for early stages of fatigue crack formation and growth that explicitly consider microstructure and relevant materials science aspects Understanding the influence or manufacturing and processing route on fatigue degradation, and embedding this understanding in more predictive schemes for mitigation and design against fatigue Prognosis and damage state awareness (including sensors, monitoring, methodology, interactive control, accelerated methods, data interpretation) Applications of technologies associated with fatigue and their implications for structural integrity and reliability. This includes issues related to design, operation and maintenance, i.e., life cycle engineering Smart materials and structures that can sense and mitigate fatigue degradation Fatigue of devices and structures at small scales, including effects of process route and surfaces/interfaces.