Either the maximum and minimum stresses of one of these and the mean stress-are required to specify the fluctuation.
最大应力和最小应力或二者之一和平均应力，以确定其起伏程度。
When shifting both the mean stress and the dynamic stress amplitude, the influence on dynamic response is the most intensive.
平均应力和动载应力振幅同时改变时，对动态响应影响最大；
A penalty finite element method in which the mean stress is used as Lagrange multiplier is developed to simulate the compaction of multiphase aggregates.
罚有限元法被推导及应用于复合粘塑性多孔材料的压缩模拟。其中以平均应力为拉格朗日乘子来分析多相材料的压缩。
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