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首页> 外文期刊>International Journal of Fatigue >Automated real-time measurements of fatigue crack length and crack opening load using unloading elastic compliance method
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Automated real-time measurements of fatigue crack length and crack opening load using unloading elastic compliance method

机译：使用卸载弹性柔度法自动实时测量疲劳裂纹长度和裂纹开裂载荷

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摘要

A system has been developed to measure crack length and crack opening load automatically in real time without changing any testing condition, by using an unloading elastic compliance method. The crack opening load is determined by a unique method using differential displacement signal data. The performance of the developed system was verified through constant-amplitude crack growth testing. The system is a very simple system, composed of a personal computer, an analogue electrical subtraction circuit, a stepping motor, a stepping motor driver, a PIO board and applications software. This system is expected to be utilized for measurements of crack length and crack opening load under random loading, short crack growth studies and effective stress intensity factor range △K_eff-controlled tests.
机译：通过使用卸载弹性柔度法，已经开发出了一种系统，该系统可以自动实时实时测量裂缝长度和裂缝开度，而无需更改任何测试条件。通过使用差分位移信号数据的独特方法来确定裂纹开放载荷。通过等幅裂纹扩展测试验证了所开发系统的性能。该系统是一个非常简单的系统，由个人计算机，模拟减法电路，步进电机，步进电机驱动器，PIO板和应用软件组成。该系统有望用于随机载荷下的裂纹长度和开裂载荷的测量，短期裂纹扩展研究以及有效应力强度因子范围△K_eff控制的测试。

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