【摘要】 本文介绍一种作者自己设计的疲劳裂纹装置．它可以代替价格昂贵的高频疲劳试验机；用于对三点弯曲试件预制疲劳裂纹．该装置结构简单，容易制造．投资少，附加在车床上即可工作．更多还原

【Abstract】 A kind of simple fatigue crack device by the auther is introduced. This device can substitute for the high frequency fatigue tester which is expensire. It is used to make fatigue cracks for test pice of three point bending. The stracture of this device is simple, easy to be made,low-cost and able to work on the common lathe.更多还原