Rapid fatigue limit estimation of smart polymer-matrix composite under self-heating bending tests using an innovative automatic approach: Knee method

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2024-11-16 DOI:10.1016/j.ijfatigue.2024.108684

L. Dolbachian, W. Harizi, I. Gnaba, Z. Aboura

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引用次数: 0

Abstract

In recent years, Polymer-Matrix Composites (PMCs) have gained increasing attention across various sectors. With this growing interest and usage, accurately determining their mechanical properties, including the fatigue properties, has become crucial. Traditional methods for these evaluations are both time-consuming and costly, prompting the development of easier and more cost-effective methods for rapidly estimating the fatigue limits of materials. Among these methods, the self-heating test has emerged as notable. The first innovation of this study lies in determining the fatigue limit through the capacitance measurements of in-situ piezoceramic transducers during the four-point self-heating bending test. This determination was validated using the classical temperature measurement methods. Additionally, a novel method called the “knee method” was developped and employed, representing the second originality of this study, and it has shown very promising results.

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采用创新的自动方法，在自加热弯曲试验中快速估算智能聚合物基复合材料的疲劳极限：膝关节法

近年来，聚合物基复合材料（PMC）在各行各业受到越来越多的关注。随着关注度和使用率的不断提高，准确测定其机械性能（包括疲劳性能）变得至关重要。传统的评估方法既耗时又昂贵，这促使人们开发更简便、更具成本效益的方法来快速估算材料的疲劳极限。在这些方法中，自加热试验的出现引人注目。本研究的第一个创新点在于，在四点自热弯曲试验中，通过原位压电陶瓷传感器的电容测量来确定疲劳极限。这种测定方法通过经典的温度测量方法进行了验证。此外，本研究还开发并采用了一种名为 "膝关节法 "的新方法，这是本研究的第二项原创性成果，并取得了非常有前景的结果。

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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.