在管道接头外表面焊缝中心处的轴向残余应力为压应力，而环向残余应力为拉应力。
On the outer surface of the pipe, the axial residual stresses of the weld and in its vicinity are compressive while the hoop stresses keep tensile.
用弹性理论分析方法，得到了环向纤维增强钢压力容器(压缩天然气气瓶)在内压作用下的应力。
Based on the elastic stress analysis, the stresses of the hoop fiber reinforced steel pressure vessels (compressed natural gas bottle) under internal pressure are obtained.
研究证实：罐壁竖直轴向压应力和由内压（静水和动水压力叠加）所产生的罐壁环向拉应力共同导致罐壁失稳，发生弹塑性屈曲变形；
The research proves that the internal pressure due to the axial compressive stress and the circumferential membrane causes the buckling of the tank wall.
在伺服试验机上对岩样进行了多种路径的加载、卸载试验，分析岩样轴向应变、环向变形与轴向应力、围压之间的关系。
Various loading and unloading paths are carried in servo-controlled testing machine to study the relationships among axial stress, strain, confining pressure and circumference deformation.
在伺服试验机上对岩样进行了多种路径的加载、卸载试验，分析岩样轴向应变、环向变形与轴向应力、围压之间的关系。
Various loading and unloading paths are carried in servo-controlled testing machine to study the relationships among axial stress, strain, confining pressure and circumference deformation.
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