从理论上说明塑性应变增量的方向不仅与应力的主方向有关，还与应力增量的方向有关。
The theoretical result shows that the direction of plastic strain increment is determined by the direction of principal stress and stress increment.
通过在屈服面的切线方向增加一项非共轴塑性应变增量，即可实现对非共轴现象的反映。
In order to reflect the non-coaxial phenomenon, a non-coaxial plastic strain rate term is added to the tangential direction of conventional constitutive model's yield surface.
塑性应变增量方向与应力路径没有很大关系，以等塑性体应变为硬化参数的屈服面形状也是椭园。
The direction of plastic strain increment is nearly independent of the stress path. The shape of yield sur- face on hardening e…
塑性应变增量方向与应力路径没有很大关系，以等塑性体应变为硬化参数的屈服面形状也是椭园。
The direction of plastic strain increment is nearly independent of the stress path. The shape of yield sur - face on...
若规定简单拉伸时两种屈服条件重合，则两者的等效塑性应变增量的相对偏差为15 .5 % ；
Their relative deviation of the equivalent plasticity strain increments was 15.5%, assuming that the two conditions coincide under simple tension;
此外，还对FLAC - 3d内嵌的本构模型深入研究，塑性流动发生时塑性应变增量对应力增量的修正。
In addition, the constitutive models included in FLAC-3D are deep into research, and the stress increments are corrected in terms of the plastic strain increment while occurrence of plasticity flow.
采用塑性增量理论，建立了波纹管液压胀形的应力、应变数值计算方法，解决了波纹管液压胀形工艺的理论计算问题。
By plasticity increment theory, the stress strain numerical calculate methods of bellows bulge forming, solvers theory calculating problems of bellows bulge forming technology are put forward.
它与夸脱理论相结合，得到了在角点处的塑性增量应力应变关系，在角点上剪应力增量与剪应变增量间是单值确定的。
Then the increment stress - strain relation of plasticity on the corner of the yielding surface is presented by the Koiter theory which is connected with the above hardening function.
本文采用塑性应变分量的分部屈服概念，提出了适用于增量法计算的分部屈服加载准则；
This paper, adopting the Concept of divitional yield of plastic strain components, proposes a loading criterion of divitional yield, which is suitable for incremental numerical method.
本文采用有限元法和增量理论对小位移小应变的弹塑性接触问题进行分析。
In this paper, the contact problems of small displacement and strain have been analysed by finite element method and incremental theory.
类似于塑性流动分析方法，定义了增量弹性应力应变关系。
The incremental elastic stress-strain relation is derived. The process is similar to the analysis in plastic flow.
考虑到土体的非线性性质，本文采用了弹塑性方法中的增量初应变法对耦合方程进行解答。
The nonlinearity of soil should take into account, so the article adopts "initial-stress" finite element approach to resolve the coupling formulation.
平砧锻造是塑性大变形问题，本文采用随动坐标系跟踪流动质点，利用能量法分步计算质点位移增量、等效应变场等，然后叠加。
To improve the accuracy of large floating point number calculatation, an iterative approach of inverse transformation for Gauss projection with floating coordinate system is presented.
平砧锻造是塑性大变形问题，本文采用随动坐标系跟踪流动质点，利用能量法分步计算质点位移增量、等效应变场等，然后叠加。
To improve the accuracy of large floating point number calculatation, an iterative approach of inverse transformation for Gauss projection with floating coordinate system is presented.
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