基于单轴应变疲劳分析，提出了比例加载多轴应力状态下的疲劳寿命计算方法。
Based on the local strain method of the single axle stress condition method, the multi axial stress condition computing method of the proportional loading is presented.
推荐了一种应变损伤累积模型，能够考虑单向板面内多轴应力和平均应力的影响。
A cumulative damage model is proposed, which can be used to consider the influence of in plane bi-axial stresses and mean stress on the fatigue behavior of unidirectional laminates.
针对混凝土多轴应力状态下各向异性损伤的特点，建立了各向异性弹塑性损伤模型。
In view of the anisotropic damage characteristics of concrete under multiaxial stress state, an anisotropic elastoplastic damage model is presented.
推导了交变载荷下弹塑性随机有限元的迭代格式，计算了局部多轴应力应变的随机响应。
The iterative formulas of elastoplastic stochastic finite element method (SFEM) under cyclic loading are deduced and the random responses of local multiaxial stress and strain are calculated.
本文对局部法作了一些改进，例如引进了由局部多轴应力状态引起的流变障碍及应力梯度的影响。
In this paper new ideas and improvements to the local approach are introduced, for instance yield locking by locally multi axial stress state and the effects of the stress gradient.
混凝土在多轴应力下的破坏准则和本构关系的试验研究已有许多成果，但大多仅适用于单调比例加载的情况。
Although many experimental results in failure criterion and constitutive relation of concrete have been reported, most of them were only applicable to simple proportional monotonic loading.
该准则的特点是：形式简单，不仅能正确反映混凝土单轴应力状态下的强度，而且能很好地反映多轴应力状态下混凝土的强度。
With a simple form, the criterion can reflect the concrete strength precisely not only under uniaxial stresses but also under multiaxial stresses.
尝试利用多轴非线性流变模型，将砾岩在多轴应力条件下的流变试验成果应用于实际工程，使仿真数值计算结果更接近实际情况。
A nonlinear model and multiaxial rheological experiment results of soft rock are applied to practice, and the simulation agrees well with the reality.
本文结合工程实际，在拱坝有限元应力分析方法与强度设计准则、多轴应力强度安全计算、拱坝极限荷载分析理论和方法等方面开展研究。
In this thesis, the FEM stress analysis and strength design criteria, multi-axes strength theory and computation, limit load analysis method of arch DAMS are concerned.
研究表明，多轴应力状态下NEPE固体推进剂强度与应力相关，八面体剪应力随平均主应力的增加呈非线性增加；NEPE推进剂的破坏强度随拉伸速率的增加而提高。
The results show that strength of NEPE solid propellant under multi-axis stress state is related to strain; octahedral shear stress nonlinearly increases with the average main stress.
基于两榀接近足尺的后张有粘结预应力混凝土框架的试验，对多跨预应力框架的内力重分布进行了研究，重点考虑了框架的连续性和轴压比的影响。
Based on tests of two full-scale double-span prestressed frames, internal force redistribution of frame was studied and continuity of structures and axial compression ratio of column were analyzed.
这种应变—寿命曲线适用于结构钢和软钢等延性材料多轴疲劳下的局部应力—应变法寿命估算。
The derived curves are convenient and applicable to ductile materials such as structural steels and mild steels.
在三轴压缩条件下，得到了由多直径颗粒体材料构成的岩样的差应力-应变曲线的峰后斜率的表达式。
In triaxial compression, an expression for the post-peak slope of differential stress-strain curve of rock specimen that is composed of the material with different grain diameters is proposed.
在三轴压缩条件下，得到了由多直径颗粒体材料构成的岩样的差应力-应变曲线的峰后斜率的表达式。
In triaxial compression, an expression for the post-peak slope of differential stress-strain curve of rock specimen that is composed of the material with different grain diameters is proposed.
应用推荐