【摘要】 本文研究用频率法测量裂纹长度。与其它测量方法比较,此法简便易行,不受环境、温度及介质的影响,且频率可直接由试验机给出,因而由设备引起的误差要小得多。更多还原

【Abstract】 In this paper the method of resonant frequency is used to measure the length of crack propagation. Comparing with the other methods, this method is convenient and easy to be applied. And it will not be influenced by the environmental conditions, the temperature and tha medium of the tests,etc. Also ,since the frequency can be determined by the machine itself, the error caused by the equipments will be much smaller.更多还原