这里说的是合金的疲劳强度.
疲劳强度的测定就是反复施加一定的应力,看它什么时候断.所以应力越大,断裂的循环次数越少.你如果查疲劳强度的s-n曲线就可以看出来.当小于某个应力值时,理论上就可以循环无限次不断裂了.
在应力是每平方英寸35000磅时,循环次数远小于10000000次.
在应力是每平方英寸30000磅时,循环次数小于300000000次.
最后的疲劳极限是每平方英寸25000磅,这就是它能保持无限循环不断裂的理论数值.
英语翻译翻译器翻译的看不懂。这里是原段落For many of the uses to which Phosphor b
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