Through analyzing the comprehensive inspections of the failure bearing, it is determined that undertaking early failure is caused by bearing ever-large axialload during working.
The experimental results show that both the failure modes and crack position of the tubes under axial compressive load changed when the end of the composite tubes are strengthened.
结果表明，复合材料圆管端部加强后，其轴压破坏模式和破坏位置都发生了改变。
3
In the range of research, the tubing failure is not strength calculation problem under internal pressure and axialload.