一定温度范围内聚烯烃均出现显著的应力波动现象，形变不均匀、不稳定。
In a certain range of tensile temperature, the stress strain behavior of polyolefins studied showed good similarity.
据此，将斜坡浅表部应力场由表及里划分为应力降低带、应力增高带及应力波动带。
Hereby, the stress field on superficial slope could be divided into regions of stress lowering, rising and fluctuating from the outside to the inside.
分析了由于冲击而引起的钢丝绳的应力波动，并从理论上找到了发生最大冲击负荷的部位及大小。
This paper analyzes the stress wave of hoisting steel rope caused by impact and The position and size of maximum impact load have been found in theory.
基于晶体塑性理论及数理统计理论，建立了流动应力波动幅度与晶粒尺寸和坯料几何尺寸间的关系。
Based on the crystal plasticity theory and mathematical theory of statistics, the relation of flow stress fluctuation quantity to grain dimension as well as billet dimensions was built.
结合一维应力波动理论，以实测打桩记录为依据，采用反分析方法确定当后继打桩出现拒锤现象时的单桩承载力。
Based on the driving records, the back-figured method is applied to estimate the pile bearing capacity after refusal taking place.
先天的安全储备不足加上各敏感性因素引起的应力波动，两者的效应总和达到混凝土的抗拉极限值，造成结构开裂；
The congenital safety margin and the stress fluctuations which caused by various sensitive parameters combine to the antipulls limit value of the concretes, and create the structure dehiscence.
在汽轮机调峰运行方式中，由于启动或负荷大幅度波动，都将在汽缸壳体等部件上产生较大的热应力。
The high thermal stress on the cylinder of a running engine could be caused by the starting and large variation of the load.
进口料的应力-应变性能波动较小，可能有助于材料在实际加工过程中的稳定；
The fluctuation of stress-strain behaviors of importable materials are relatively small, which may be helpful for their processing properties.
从以速度-应力表示的一阶波动方程出发，导出了起伏边界情况下的边界条件。
Starting from one-order wave equation, we derived boundary conditions under ragged surface.
预应力的不稳定变化关系到工程运营期的安全性，因而，研究锚固力的波动变化显得非常重要。
Instability variation of prestressed force will influence the security of the project, so it is very important to study the fluctuating variation of the force.
地震动态应力使围压产生低值波动，一方面使围压减小、摩擦力减小；
The dynamical stress produced by superposition or interference of reflected stress wave makes confining pressure reduce and change at low values.
管桩低应变检测时，平截面假定并不满足，应力波的传播不能简单地用一维波动方程描述。
The plane-section assumption was not congruous in low strain dynamic tests on pipe piles, so the propagation of stress wave couldn't be expressed by 1D wave equation.
当初始损伤超过某临界值后会显著地影响应力波的波动范围和围岩应力分布；
The initially existing damage has apparently affected on wave stress propagation and stress distribution as long as its quantity exceeds a threshold value.
试验证明，饱和土属于应变硬化介质，在激波动力加载条件下，土中应力波将保持其激波特征不变。
The tests prove that saturated soils are a kind of strain hardened media and stress wave will maintain shock wave characteristic invariant during shock wave dynamic loading.
试验证明，饱和土属于应变硬化介质，在激波动力加载条件下，土中应力波将保持其激波特征不变。
The tests prove that saturated soils are a kind of strain hardened media and stress wave will maintain shock wave characteristic invariant during shock wave dynamic loading.
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