但众所周知，在塑性阶段的极限承载力状态下应力叠加原理是不成立的。
But it is well known that the principle of superimposed stresses is not correct under ultimate limit states of plastic stage.
根据附加应力叠加原理，逐步推导得到不同布桩形式的群桩效应系数计算公式。
The formula for effect coefficient of piles group were solved gradually under different shape of laying-out piles according to principle of additional stress superposition.
基于应变叠加原理的基本思想。阐释了金属振动塑性加工平均应力减小的原因，给出了体积效应机理的数学描述。
Based on the strain superposition principle, the phenomenon of mean stress reduction in metals plastic processes with vibration is explicated. and the mechanism of volume effect is described.
活载作用下结构挠度、应力与荷载呈线性关系，叠加原理能够适用。
The deflection and stress of the structure are linear with load under effect of live load. The superposition principle can be used.
首先，应用有限元方法，基于曲率模态叠加原理计算曲率，进而计算应变、应力。
Firstly, with the curvature modal superposition method, the dynamic stress responses is calculated.
以四元件模型为基础，利用玻尔兹曼叠加原理建立了纱线应力松弛变化过程的理论方程，并分别对彩棉喷气涡流纺及环锭纺纱线进行松弛实验。
Based on the four-element model, the equation of the stress relaxation process is developed using the principle of Boltgation superposition in this paper.
本文采用了弹性理论中的楔形体理论，对均质边坡开挖过程进行了分析，在平面应变问题的基础上结合线性叠加原理得到开挖坡体的应力场。
Elastic wedge model is used for analysis of excavation of homogeneous slope. On the basis of elastic plane-strain theory and the line folds to add theory, stress field of the excavation is got.
本文采用了弹性理论中的楔形体理论，对均质边坡开挖过程进行了分析，在平面应变问题的基础上结合线性叠加原理得到开挖坡体的应力场。
Elastic wedge model is used for analysis of excavation of homogeneous slope. On the basis of elastic plane-strain theory and the line folds to add theory, stress field of the excavation is got.
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