裂紋增長速率 的英文怎麼說
中文拼音 [lièwénzēngzhǎngsùlǜ]
裂紋增長速率
英文
crack growth rate-
There is a slight drop of the fcpr when the specimen s thickness increases. however, the thickness of the specimen exerts a great influence on kth and fatigue life ( n ) : the thicker specimen is, the higher fatigue life ( n ) becomes, and the greater kth shows. under control of the same conditions, the fcpr of am50 is not so high as that of az91. there are some correlations between load ratio ( r ) and the fatigue surface : when load ratio becomes great, small flat surfaces increase while dimples decrease
試樣厚度增大,穩態裂紋擴展速率略有減小。但是,試樣厚度影響試樣的疲勞壽命和門檻值:試樣越厚,疲勞壽命越長,門檻值越大;在試樣尺寸和加載條件相同的情況下, am50的疲勞裂紋擴展速率較az91小,疲勞壽命則比az91長。載荷比r影響試樣的斷口形貌:載荷比r越大,對應相同k值出的斷口小平面越多,韌窩越少。
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