The research focuses on the defect equivalent analytical methods in building steel structure butt weld fusion and the effects of non-crack-type defects on the normal use of butt weld fusion.
本课题研究了建筑钢结构熔透对接焊缝中缺陷当量的分析方法和非裂纹类缺陷对焊缝正常使用的影响。
The mechanical properties of the butt welded joints have been evaluated according to the impulsive and fracture toughness as well as the rate and threshold values of fatigue crack propagation.
根据试验测定的焊缝各区冲击韧性、断裂韧性、疲劳裂纹扩展速率和疲劳裂纹扩展门槛值，对焊缝力学性能作出综合评价。
When the gap of butt joint increases, cold crack rate gradually decreases.
随着接头间隙的增大，裂纹率逐渐减少。
Butt China was a tough market to crack — especially in the face of stiff opposition from Didi.
但中国是一个很难突破的市场——尤其是在面对强劲对手滴滴的情况下。
Butt China was a tough market to crack — especially in the face of stiff opposition from Didi.
但中国是一个很难突破的市场——尤其是在面对强劲对手滴滴的情况下。
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