经典力学

In the framework of non-equilibrium elastoplastic mechanics, the classic finite element method is extended to the analysis for post-failure state of structure, where the plastic complementary energy norm serves as the criterion of global stability while the unbalanced force and its development indicates the pattern and path of destruction.

在非平衡态弹塑性力学框架下，将经典有限元拓展到结构失稳后的分析，塑性余能范数即可作为库群失稳判据，而不平衡力及其发展则表征了库群失稳破坏的形态和演化路径。

We feel that fracture mechanics should be dated from 1948, the year of publication of the first of Irwin's classic papers.

我们认为断裂力学应该从1948年开始，在这一年里，Irwin发表了他的第一篇经典文章。

The equations of electromagnetic field are invariant with respect to the Lorentz transformation and the mechanical equations are invariant with respect to the classical transformation.

电磁场方程对于洛伦兹转换是不变的，而力学方程对于经典转换是不变的。

Key words: Newtonian mechanics; Methodology; Philosophical thinking; Law; Build and develop

核心提示：牛顿力学的方法论及其哲学思想摘要：牛顿代表了1个时代——现代经典科学奠基和发展的时代。

As a special case, when the index isα=0 or α=1, the equations is just the classical elastic mechanics or the Newtonian viscous mechanics, respectively.

作为特例，当粘弹性指标分别为α=0和α=1时，以上方程组即为经典的弹性力学和牛顿流体力学基本方程。

It is difficult to solve it by traditional mathematic and mechanical methods, so the numerical value analysis is used.

经典的数学方法和力学方法对大多数接触问题都难以解决，需用数值计算方法来进行分析。

Substituting the dynamic model of a two-dimensional piezoelectricactuator into laminated piezoelectric plates,this paper transforms a problemof the laminated piezoelectric plates into the superimposition of a pureproblem of classical laminated plates and a pure problem of electrostatics,which gives another method for analyzing laminated piezoelectric plates.Themethod has advantages of simplicity,and practicableness.

将二维压电致动器的动力学模型应用于一般压电层合板结构中，本文将一压电层合板问题转化为一纯的经典层合板力学问题和一纯的静电学问题的简单组合，便给出了另一分析压电层合板的方法。

Based on the variational principle of virtual voltage and virtual displacement derived in this thesis and the classical theory of linear laminated plates, and by using the constitutive equations of elastic piezoelectric materials, and the DKQ quadrilateral plate bending element, the finite element modeling for the fabric reinforced laminated plates with nonlinear voltage-electric strain relationship of piezoelectric actuators has been established for the first time in this thesis. And the expressions for the electric loadings with obvious mechanical meaning and convenient for computation are established, which can be used to the deformation analysis of laminated plates with piezoelectric actuators under specified voltages.

以本文直接导出的压电结构的虚电势—虚位移变分原理为基础，依据经典线性层合板理论和压电弹性体的本构方程，采用基于离散法线假设的DKQ四结点任意四边形薄板弯曲单元，首次建立了考虑非线性电压—电应变关系的含压电致动器的纤维增强型层合板的有限元分析模型，并推导建立了力学意义明确、便于计算的电荷载表达式，可用于指定电压条件下纤维增强型叠层合成板的变形分析。

The study shows that the ability of resistance to deformation and the bending recoverability of SMPC materials are higher than that of SMP materials.

为了提高形状记忆聚合物的刚度性能，研制了纤维增强苯乙烯基形状记忆聚合物复合材料，对其动态力学和弯曲性能进行了测试分析，采用有限元分析法得到SMP和SMPC梁的弯曲变形规律，并利用经典层合板理论对其刚度进行分析。

In this paper, mechanical performance is studied between FRP cables and steel cable s, and some distinguished cable-stayed bridges round the world are discussed detailedly.

本文对FRP索与钢索的一系列力学性能做了较深入的比较，并较详细的论述了当前世界上采用FRP索的经典斜拉桥。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新