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一般假设:使用适当的试样来评定材料常数K_(Ic)是不取决于试验机响应特性的。而此种假设对于裂缝突然开始来说也许是可靠的,如哪里有裂缝突然开始, 哪里就会有对塑性特性的平滑过渡, 不管试样——试验机共同对“构成的”K_(Ic)值有多少影响。评定裂缝‘开始后’
The general assumption is that using a suitable specimen to assess the material constant K_ (Ic) does not depend on the test machine response characteristics. And such assumptions may be credible for the sudden onset of a crack, where there is a sudden start in the crack where there is a smooth transition to the plasticity regardless of the “test piece” Ic) value how much impact. Assessment of cracks after ’start’