变松弛

The relationship between stress and strain of concrete in prestressed concrete bridge s is written as algebraic form within load duration and the equilibrium equations of internal force and compatibility conditions are introduced.

首先将预应力混凝土桥梁中考虑收缩、徐变影响的任意时刻混凝土应力、应变关系在持荷时段内写成代数形式，引入内力平衡方程及变形协调条件后，提出了计入截面上钢筋位置、配筋率、预应力钢筋松弛、混凝土弹性模量随时间变化等影响的徐变效应分析的全量形式自动递进法，并建立了计算式，适用于任何形式的收缩、徐变特性表达式；基于建立的全量形式公式，可方便地求解任意时刻混凝土、钢筋的应力与应变和梁体竖向变形。

Combining the functional analysis method with the heat conduction differential equations the finite element mathematic modal as the solution to the period cyclic symmetric structure temperature field was constructed.

试验研究了SiCp_A356复合材料在20℃～450℃之间的拉伸力学性能、循环应力应变响应以及应力松弛行为，以经典的弹塑性增量理论作为塑性模型、以经典的Dom幂率方程作为蠕变模型，引入温度效应，建立了适用于制动盘结构分析的热弹塑性-蠕变本构模型。

Firstly, the three-dimension boundary question and its corresponding variation question concerning the point-source electrical field on a 3-D structure are presented. Secondly, the finite element method is used to solve the variational equation. The study area is divided into many tetrahedral elements. Then, we interpolate with a tri-linear function in each element. So, the variational equation is converted into a linear equation system. Finally, taking into account saving of time, we make use of symmetric successive overrelaxation preconditioned conjugate gradient algorithm to solve large linear system, and obtain the potential value of each node, resulting in the calculation of the apparent resistivity values on the ground surface.

首先给出了三维构造中点源电场的边值问题以及相应的变分问题；然后利用有限单元法求解变分问题，采用四面体单元对研究区域进行剖分，在单元中进行三线性函数插值，将变分方程化为线性代数方程组；最后，考虑到节约计算时间，利用对称超松弛预条件共轭梯度迭代算法求解大型线性方程组，得到了各节点的电位值，进而计算出地表的视电阻率。

Accordingly, it is known that slip forming concrete is the elasto-viscous and plastic material mainly having strain-softening characteristic, and there are elastic deformation, rigid slide, elastic after-effect, delayed elastic deformation, stress relaxtion, creep and plastic-viscous flow in its rheological process.

据此得知：滑模成型混凝土是以应变软化为主的弹粘塑性材料，其流变过程中将产生弹性变形、刚性滑移、弹性推迟、弹性后效、应力松弛、蠕变和塑粘流动。

By using the resolvent operator technique associated with relaxed-monotone operators, we construct a new iterative algorithm for solving the system of generalized mixed quasi-variational-like inclusions. We also prove the existence of solutions and the convergence of iterative sequences generated the iterative algorithm.

利用松弛－-单调算子的豫解算子技巧，给出了求解这类广义混合拟似变分包含组的迭代算法，并证明了由迭代算法生成的迭代序列强收敛于该变分包含组的精确解。

More defects forming in the growth plate during deposition almost attribute to the lattice constant relaxation, which makes its lattice constant get larger. However, self-annealing of diamond thick films for long time in the process of deposition makes their lattice constant in their interior and nucleation plate approach its natural value.

化学气相沉积金刚石初期生长的晶体存在大量的空位等缺陷，晶格松弛，在金刚石膜持续生长过程中，形核面和膜内部在高温下发生长时间的自退火，缺陷浓度下降，晶格松弛现象消除，晶格常数变小并趋于理论值。

In this paper Laplace transforms is utilized in viscoelastic theory of polymers making the relations between various viscoelastic functions like relaxation modulus , creep compliance and functiqns representing dynamic behavior simple and clear, relaxation spectrum and retardation spectrum are defined in terms of Laplace transform to correlate all viscoelastic functions.

将拉普拉斯变换应用于聚合物粘弹性理论，使粘弹性材料的特性函数如松弛模量、蠕变柔量以及表示动态力学性能的函数之间的关系简单明了，并用拉氏变换定义松弛谱和推迟谱，将各粘弹函数相互联系起来。

Relaxation—Rate of reduction of stress in a m aterial due to creep. An altern ate term is

松弛—材料由于蠕变而产生的应力衰减率，另一个替代术语是应力松弛。

OBJECTIVE: To compare the rheological properties of stress relaxation in normal and atherosclerotic animal model of ascending aorta, and to identify the effects of atherosclerosis on the stress relaxation properties of ascending aorta.

目的：比较正常和动脉粥样硬化动物模型升主动脉的应力松弛流变特性，确定动脉粥样硬化对升主动脉应力松弛特性的影响。

Pregnant bodies produce a hormone, relaxin, which softens tissues around the pelvis to prepare it for birth.

怀孕的身体产生荷尔蒙、松弛素，松弛素使骨盆周围的组织变软，使骨盆为生产做好准备。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

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如果有任何问题，你可以随时联系我。