关键词: 超声疲劳, 断裂, 裂纹扩展速率, 疲劳极限, 门槛值

Abstract:

Having the advantage of saving time and energy, ultrasonic fatigue is an economic and effective method. It satisfies the investigations on long fatigue life and low crack growth rate, especially that on fatigue limit and threshold regime. The improvements of theory and technique, mainly high accuracy and varied testing possibilities, have been obtained during the last years. Besides scientific investigations for fatigue and fracture mechanics, ultrasonic fatigue is also used for industrial applications. A review of the progress is given.

Key words: ultrasonic fatigue, fracture, fatigue crack growth rate, fatigue limit, threshold