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首页> 外文期刊>St. Petersburg Polytechnic University Journal: Physics and Mathematics >Theoretical and experimental studies of the stress-strain state of expansion bellows as elastic shells
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Theoretical and experimental studies of the stress-strain state of expansion bellows as elastic shells

机译：膨胀波纹管应力 - 应变状态作为弹性壳的理论与实验研究

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This paper studies a stress-strain state of the U-shaped expansion bellows under an internal-pressure induced load. The bellows is considered as a corrugated shell of revolution under axisymmetric load. The governing equations have been derived and the numerical calculations of the stress-strain state were carried out. A variant of the classical shell theory based upon Lagrangian mechanics was used. The finite-difference method was applied to solve the obtained system of ordinary differential equations. The ultimate internal pressure resulting in plastic deformations was determined. A simulation of the loss of equilibrium stability of the expansion bellows was performed. The ANSYS code was used for Finite-Element Method (FEM) in order to calculate the stress-strain state in the bellows.
机译：本文研究了内压诱导负载下U形膨胀波纹管的应力 - 应变状态。波纹管被认为是轴对称负荷下旋转的波纹壳。已经得出了控制方程，进行了应力 - 应变状态的数值计算。使用基于拉格朗日力学的古典壳理论的变体。应用有限差分法来解决所获得的常微分方程系统。确定导致塑性变形的最终内部压力。进行了膨胀波纹管的平衡稳定性损失的模拟。 ANSYS代码用于有限元方法（FEM），以便计算波纹管中的应力 - 应变状态。

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