The frog at the bottom of the well is always blind to the extension of the sky . ” ambitious men ams far ” , let ' s get started , with the tall minar lights up our long voyage , and the voice of singing accompanies 井底之蛙，永远看不到天空的广阔， “好男儿志在四方” ，让我们踏歌而行，看高高的灯塔照亮我们远航的路。
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Moreover , base on lots of test data , fatigue life estimation is finished by help of miner , opposite miner rule and fracture mechanics theory . theoretic results and test data are well fit to each other 另外，本文在大量试验数据的基础上，依据miner法则、相对minar法则以及断裂力学理论，对40cr高强螺栓的疲劳寿命估算进行了系统研究，理论分析结果与试验值的规律性吻合较好。
