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有关螺旋桨材料的疲劳特性、本文作者利用在海水中再现实际运转的疲劳试验弄清了寿命达10~8次的疲劳强度及疲劳裂纹扩展特性[1～3]。但因螺旋桨的实际运转寿命是10~9次或更高,所以必须搞清10~9～10~(10)次寿命区域的疲劳强度。用实验的方法求出试验结果,需要超过10年的时间,因此,采用了将已求得的达10~3次寿命的疲劳特性的实验值进行统计整理,使
Regarding the fatigue characteristics of propeller materials, the authors used the fatigue test to reproduce the actual operation in seawater to clarify the fatigue strength and fatigue crack growth characteristics of the life span of 10 to 8 times [1-3]. However, since the actual operating life of the propeller is 10 to 9 times or more, it is necessary to find out the fatigue strength in the life region of 10 to 9 to 10 to 10 times. It takes more than 10 years to obtain the test results by the experimental method. Therefore, the experimental values of the fatigue characteristics of the obtained life span of 10 to 3 times are statistically calculated