Further experimental study on the failure of fully clamped steel pipes
Further experimental study on the failure of fully clamped steel pipes
复制标题
DOI：
10.1016/s0734-743x(97)00083-3
复制
发表时间：
1998-03
影响因子：
5.1
通讯作者：
Kaisheng Chen;W. Shen
中科院分区：
文献类型：
--
作者：
Kaisheng Chen;W. Shen
本文报道了226根低碳无缝钢管的冲击试验数据。将不同几何形状的管道试件两端完全夹紧，分别在跨中、四分之一跨和非常靠近支座处用刚性楔形压头进行横向冲击。为了模拟完全夹紧的边界条件，设计了一个特殊的夹紧系统，以在每个端部刚性地保持管试样，以防止任何明显的向内位移。冲击速度范围高达10.69米/秒，并造成大的非弹性压痕较低的值，并在较高的值附近的支持的完整性损失。特别注意的是获得阈值的初始冲击能量，导致材料破裂的开始。讨论了管道几何形状、冲击位置和内压对初始冲击能临界值的影响。
In the present study experimental data recorded from 226 impact tests on seamless mild steel pipes are reported. The pipe specimens with different geometries were fully clamped at both ends, and impacted transversely by rigid wedge-shaped indenters at the positions of mid-span, one-quarter span and very close to a support, respectively. In order to model the fully clamped boundary conditions, a special clamping system was designed to hold the pipe specimens rigidly at each end to prevent any significant inward displacements from the supports. The impact velocities ranged up to 10.69m/s and caused large inelastic indentations for the lower values and at higher values a loss of integrity near the supports. Particular attention was paid to obtaining the threshold value of initial impact energy that caused the onset of material rupture. Discussion is made for the influences of pipe geometry, impact position and internal pressure on the critical value of initial impact energy.