{"title":"Controllable kilohertz impact fatigue loading functioned by cyclic stress wave of Hopkinson tension bar and its application for TC4 titanium alloy","authors":"Jianping Yin, Chenxu Zhang, Ruoheng Sun, Yilun Hu, Yinggang Miao, Yulong Li","doi":"10.1016/j.ijfatigue.2025.108828","DOIUrl":null,"url":null,"abstract":"Engineering materials are occasionally subjected to high-frequency impact fatigue in service. However, there are still gaps in the loading techniques that hinder the acquisition of sufficient experimental data. In this work, we developed a novel loading methodology based on stress wave guidance to achieve controllable impact fatigue of ∼ 1 kHz frequency. Hopkinson tension bar was modified first by introducing a highly mismatched wave impedance ratio of the incident bar over specimen, ensuring nearly total reflection of the incident stress waves and thereby generating successive stress waves to perform impact fatigue loading on specimen. Each unloading process was governed by specimen recovery within loading interval. Case study was conducted by experimenting TC4 titanium alloy at the frequency of 1,048 Hz. Meanwhile, each strain, stress and strain rate are measurable during loading and recovery cycle. Finally, the comparison with the results from non-impact fatigue of 5 Hz revealed that, at high stress amplitudes, the impact fatigue life of high-frequency is lower than that of the low-frequency non-impact fatigue. Both crack initiation and propagation mechanisms are influenced by load amplitude and frequency.","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"10 1","pages":""},"PeriodicalIF":5.7000,"publicationDate":"2025-01-19","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.2025.108828","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
Engineering materials are occasionally subjected to high-frequency impact fatigue in service. However, there are still gaps in the loading techniques that hinder the acquisition of sufficient experimental data. In this work, we developed a novel loading methodology based on stress wave guidance to achieve controllable impact fatigue of ∼ 1 kHz frequency. Hopkinson tension bar was modified first by introducing a highly mismatched wave impedance ratio of the incident bar over specimen, ensuring nearly total reflection of the incident stress waves and thereby generating successive stress waves to perform impact fatigue loading on specimen. Each unloading process was governed by specimen recovery within loading interval. Case study was conducted by experimenting TC4 titanium alloy at the frequency of 1,048 Hz. Meanwhile, each strain, stress and strain rate are measurable during loading and recovery cycle. Finally, the comparison with the results from non-impact fatigue of 5 Hz revealed that, at high stress amplitudes, the impact fatigue life of high-frequency is lower than that of the low-frequency non-impact fatigue. Both crack initiation and propagation mechanisms are influenced by load amplitude and frequency.
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.
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
