The regression curve of compression Poisson ratio consists of three sections & before crack of concrete, before the peak stress and after the peak stress. 受压泊松系数回归曲线分为混凝土开裂前(BC)、达到峰值应力前和峰值应力后3个阶段。
It is also found that, before crack initiation, the magnitude of the surface crack plastic opening angle d δ _s ~ p / d α increases with increasing △α. 起裂前(BC),表面裂纹塑性张开角dδs~p/dα随Δα增长而增加。
Fatigue behavior of carburized steel before crack initiation 渗碳钢在裂纹萌生前的疲劳行为
And now they are planning to open another factory in United States where they are hoping to do what no Chinese car maker has ever done before, crack the American market or be it with a British brand. 现在他们正计划在美国建立另外一个工厂,他们希望能做一件中国的汽车厂商从来没有做过的事情,利用一个英国品牌打入美国汽车市场。
But according to the results of the survey, the national regions quite a number of concrete pavement, did not reach the design in use period, before the crack, can appear in the form of disease. 但是调查结果显示,全国各地区相当数量的混凝土路面,在未达到设计使用期限之前,就出现了裂缝、断板等形式的病害。