shrinkage gradient 中文意思是什麼
shrinkage gradient
解釋
收縮梯度-
The key to prediction of casting shrinkage / porosity lies in ascertaining the critical value of temperature gradient and niyama criterion. the thesis put forward two methods to ascertain the value, one is which is positive - direction and the other is negative - direction. we verify the realistic arithmetic of temperature gradient method and niyama criterion method by experiment, and we can draw a conclusion that the arithmetic is correct and reasonable in most cases and choice of developing tool is sound
臨界梯度值和新山判據臨界值的確定是實現縮孔縮松預測的關鍵,本文提出了確定臨界值的正向法和反向法,並以高鉻鑄鐵件縮孔縮松預測和鑄造工藝改進為研究對象,應用正向法,確定了溫度梯度法的臨界值為180 m 。 -
Then according to temperature gradient and humidity gradient, which are the essential factors inducing concrete cracks, distribution of thermal and moisture within young concrete and numerical methods to calculate temperature stress and shrinkage stress are systematically analyzed
然後針對引起混凝土開裂的本質因素即混凝土內部的溫濕度梯度,系統地分析了混凝土溫濕度場的變化規律及溫度應力和干縮應力的數值計算方法。
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