fracture resistance

Aiming at the problem of structure design of a highway tunnel crossing active faults zone,protective design strategies of breaking resistance are put forward;and then over-excavation and articulated design are discussed.

针对穿越活动断层区隧道的结构设计,提出活动断层区隧道结构的抗断设计对策;对"超挖设计"和"铰接设计"两种抗断设计方法进行了讨论;提出了"铰接设计"中隧道节段长度及节段间连接抗剪刚度的计算方法,并分析了连接剪切失效后隧道节段的运动特征。

The HAZ of thermit welding joint is very sensitive to the flaws, which is the weakness point of anti-break performance.

考虑到实际铝热焊接头力学性能分布的复杂性,用有限元分析方法计算了不同裂纹尺寸的装甲钢板母材和实际铝热焊接头拉伸板的应力应变场与CTOD参量,并以全面屈服理论为依据,用CTOD参量对纯母材的铝热焊接头的抗断性能进行了比较和评估。

Such effective measures as adjusting the alloy elements ratio,rare earth breeding,improving the cambered surface dimensions of the brake shoes are taken,a kind of high phosphorous cast iron brake shoes whose breaking strength performance has improved greatly has been researched and developed.

通过对高磷闸瓦断裂机理进行研究分析 ,找出了断裂的内在原因 ,采取了调整合金元素比例、稀土孕育处理、改进闸瓦弧面尺寸等有效措施 ,研究开发出了一种抗断裂性能大幅度提高的高磷铸铁闸