壁厚对厚壁圆筒的极限载荷的影响

应用双剪统一强度理论，同时考虑材料的拉压异性和同性，推导了在内压和轴力联合作用下的厚壁圆筒的极限载荷表达式，并且绘制了不同相对壁厚的极限载荷线图以及相对壁厚对相对极限载荷的影响曲线，不同的极限载荷线图说明了在厚壁圆筒处于屈服极限状态下，随着相对壁厚的变化，相对载荷变化的规律，相对壁厚对极限载荷影响曲线反映了相对壁厚对处于屈服极限状态下，受到不同的内压力和轴向力作用的厚壁圆筒的影响程度。

The Influence of Walled Thickness upon the Limit Loading of Thick Walled Tube

The limit loading formula of thick-walled tube with strength differential effect in tension and compression are derived in the twin shear unified strength theory ,and its curves of limit loads and relational curves between relative walled thick and relative limit loading are plotted.The differential curves of limit loading with differential walled thick indicate that values of relative limit loading vary as amount of relative walled thick vary under the yielding state of thick-walled tube.The relational curves between the relative walled thick and the relative limit loading indicate that the relative walled thick has a big or small influence upon the relative limit loading of thick-walled tube under the yielding state acted on by differential inner pressures and axies forces.