... principle of superimposed stresses 应力叠加原理 principle of superposition 叠加原理 principle of virtual displacement 虚拟位移原理 ...
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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.
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