Highest level of stress crack resistance.
最高级别的抗应力裂纹。
Intermediate flow rate with higher stress crack resistance than 340.
中高级流量，抗裂应力超过340。
Longitudinal crack of drill pipe box joint is brittle fracture at low stress.
钻杆接头的各种纵向开裂属于低应力脆性断裂。
The stress field near crack tip is an important factor to effect crack extension.
裂纹缺陷周围的应力变形场是影响裂纹扩展的重要因素。
Big distortion and stress concentration happened near the tip of crack.
裂纹尖端附近有较大变形，应力集中明显。
Besides, the welding stress and wicked water accelerate the crack growth.
同时，焊接应力的存在和水质不良加速了裂纹的扩展。
The main job is to find the stress intensity factors for crack configurations.
其主要任务是确定构型裂纹尖端的应力强度因子。
The main job is to find the stress intensity factors for crack configurations.
其主要任务是确定构型裂纹尖端的应力强度因子。
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