钻杆接头的各种纵向开裂属于低应力脆性断裂。
Longitudinal crack of drill pipe box joint is brittle fracture at low stress.
本文从设计、施工、材料等方面论述了预制楼板板缝纵向开裂产生原因及防治措施。
This paper states the causes and prevention measure of longitudinal crazing of joints of pre - cast floor slab from the aspects of design, construction and material.
结合监理工作中的实践，对高填方路段路面纵向开裂的成因进行了分析，提出了预防措施。
Combining with the experience of supervising, the paper analyses the reasons of the longitudinal craze of surface with high filling and puts forward the precautionary measures.
在此基础上推导了连续组合梁纵向开裂荷载的计算公式并结合试验给出了箍筋配置计算公式。
On the basis of it, the formulas of calculating crack load and ratio of stirrup disposition were gained.
虽然裂纹源很难避免，但如果能够阻止裂纹的扩展，也能够防止钻杆内螺纹接头纵向开裂失效。
Although it is hard to avoid the sources of fracture, the longitudinal fracture failure on the box joint can be prevented if proper measures are taken to prevent further extension of the fracture.
近年来由于深井、定向井等逐渐增多，油气井钻井中钻杆内螺纹接头纵向开裂失效成为常发事故。
Due to the increasing number of deep Wells and directional Wells being drilled, longitudinal fracture occurred on the box-ended drill pipe tool joint is often reported.
防止18 - 8型不锈钢技深件纵向开裂的有效措施之一是在拉深时采用小于板料厚度的凸凹模间隙。
One of the valid method to reduce the vertical breaking in deep-drawing of 18-8stainless steel is to adopt a die clearance which is less than the plate thickness.
分级时效处理，低温下先让合金内部的宏观应力松弛，再在较高温度下时效，可有效地避免棒材纵向开裂。
However, stepped aging, which relaxes internal macro-stress under lower temperature then ages under higher temperature, can avoid longitudinal cracks effectively.
应用钻杆失效评估技术研究表明，横向材料冲击功大于80J将避免钻杆内螺纹接头纵向脆性开裂失效。
The drill pipe failure assessment demonstrates the longitudinal brittle fracture will be avoided when the transverse impact power of the material is over 80J.
利用改进的剪切滞后法，研究了组成纤维缠绕压力容器中的环向层的横向开裂而在纵向层中引起的局部应变集中。
Local strain concentration in angle-ply lay caused by transverse crack of circular lay in composite pressure vessel was studied by means of advanced shear-lag method.
在公路隧道检修时，发现衬砌混凝土产生多处纵向裂缝，开裂较为严重。
When a road tunnel is checked, serious longitudinal cracks are detected in the liner concrete.
在公路隧道检修时，发现衬砌混凝土产生多处纵向裂缝，开裂较为严重。
When a road tunnel is checked, serious longitudinal cracks are detected in the liner concrete.
应用推荐