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.

中文翻译：

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使用创新的自动方法：拐点法在自热弯曲试验下快速估计智能聚合物基复合材料的疲劳极限


近年来，聚合物基复合材料 （PMC） 在各个领域越来越受到关注。随着人们的兴趣和用途越来越大，准确测定其机械性能（包括疲劳性能）变得至关重要。用于这些评估的传统方法既耗时又昂贵，这促使开发更简单、更具成本效益的方法来快速估计材料的疲劳极限。在这些方法中，自热测试变得值得注意。本研究的第一个创新在于在四点自热弯曲试验期间，通过原位压电陶瓷传感器的电容测量来确定疲劳极限。该测定使用经典的温度测量方法进行了验证。此外，开发并采用了一种称为“膝法”的新方法，代表了这项研究的第二个独创性，并显示出非常有希望的结果。