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hybrid stress
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  杂交应力
     The transformation of the typical hybrid stress element of plane elasticity, Pian-Sumihara element, into a plate bending element is studied.
     把典型的平面弹性杂交应力元-Pian-Sumihara 元-转化为板弯曲单元,从而初步探讨了将平面弹性杂交元转化为板弯曲单元的方法。
短句来源
     The nonlinear hybrid stress finite element method for Hahn-Tsai composite materials
     Hahn-Tsai复合材料的非线性杂交应力有限元方法
短句来源
     The Stress Subspace of Hybrid Stress Element and the Diagonalization Method for Flexibility Matrix H
     杂交应力元的应力子空间和柔度矩阵H对角化方法
短句来源
     Research of Hybrid Stress FEM and Its Integration with MSC/PATRAN
     杂交应力元的研究及其与MSC/PATRAN的集成
短句来源
     MODEL OPTIMIZATION OF HYBRID STRESS GENERAL SHELL ELEMENT
     杂交应力通用壳元的模式优化
短句来源
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  应力杂交
     Hybrid Stress Element with a Cubic Displacement Model for Laminated Plates
     三阶位移模式层合板的应力杂交
短句来源
     The relationship between the equilibrium model by Fraeijs de Veubeke and the assumed stress hybrid model is also discussed, and it is shown that such equilibrium model can be derived by the approach of the hybrid stress model as a special case of Semi-Loof elements.
     最后,讨论Fraeijs de Veubeke平衡元与应力杂交元的关系,并指出这种平衡元可以作为一种Semi-Loof型单元由应力杂交元推导出来。
短句来源
     A MIXED VARIATIONAL PRINCIPLE FOR PARTIAL HYBRID STRESS MODEL OF DYNAMIC ANALYSIS AND ITS APPLICATION
     部分应力杂交动力分析模型的混合变分原理
短句来源
     Based on general solution of stress strain fields at crack tip in Reis-sner's plate, a high order singular element is ' proposed by using hybrid stress method.
     本文在Reissner型平板裂纹尖端应力应变场一般解~[2,3]的基础上,采用应力杂交法构造高阶奇异元。
短句来源
     The unified formulae of the finite element equilibrium equations, (Kb+αKs) q = F, is derived for both displacement method and hybrid stress method. It is demonstrated that the reason of eliminating locking of reduced integration and assumed stress method is identical, i.e., the constraints infroduced by shear-strain energy Ksq = 0 only give rise to Kirchhoff constraints.
     本文以板弯曲单元为例,将位移法和应力杂交法导得的有限元平衡方程写成统一的形式,(K_b+αK_s)q=F,指出减缩积分和假设应力法消除自锁的原因是一致的,即使剪切应变能引入的约束K_(s_q)=0为Kirchhoff约束。
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  “hybrid stress”译为未确定词的双语例句
     A New Shallow Shell Hybrid Stress Element
     一种优化的中厚扁壳杂交元
短句来源
     An Engineering Method of Hybrid Stress Element in Cylindrical Coordinate
     杂交元在圆柱坐标系中的应用
短句来源
     In the second part, two methods are presented in order to simplify the pre-procession and post-procession of FEA in the seventh chapter, to integrate the hybrid stress element program into MSC/PATRAN which is one of the best commercial programs for pre-processing and post-processing FEA.
     本文第二部分侧重于有限元方法的实际应用。 为了简化繁琐的有限元前后处理,本文采用两种不同的方法将杂交元程序集成到世界公认最佳的有限元前后处理器MSC/PATRAN中去,首次对自编程序与通用CAE软件包MSC/PATRAN的集成方法进行了总结,并对两种集成方法进行了比较。
短句来源
     Kinematic deformation modes in the hybrid stress model are identified and the technique required to suppress the mechanisms is presented.
     其次,阐述杂交元中机动变形模式的识别与抑制方法。
短句来源
     Finally, the computational examples are presented and the results show that the stresses and the displacements obtained by the hybrid-mixed element model are more accurate than those by the hybrid stress element model or the assumed-displacement element model;
     文中算例表明:杂交混合元用于空间弹塑性分析可以得到比位移元和杂交元更好的精度;
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  hybrid stress
Hybrid stress analysis of perforated composites using strain gages
      
Hybrid stress analysis by digitized photoelastic data and numerical methods
      
Image-processing techniques in laser-speckle photography with application to hybrid stress analysis
      
The work reported herein is concerned with an investigation of the potential of mating time-average holography and static-finite-element analysis (a 'hybrid' stress-analysis technique) in solving dynamic problems.
      
Hybrid stress analysis of vibrating plates using holographic interferometry and finite elements
      
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Based on the modified principle of Complementary energy,a hybrid stress shell element is formulated in the cylindrical coordinate system.The complete linear membrane stresses and bending moments are included in the expressions in thiselement and the transverse shears are assumed to be constant.It has 4 nodes and20 d.o.f.in displacement.The transverse shear effects can be taken in to accountin the complementary energy and then this element can be used to analyse eitherthin shells or morderate thick...

Based on the modified principle of Complementary energy,a hybrid stress shell element is formulated in the cylindrical coordinate system.The complete linear membrane stresses and bending moments are included in the expressions in thiselement and the transverse shears are assumed to be constant.It has 4 nodes and20 d.o.f.in displacement.The transverse shear effects can be taken in to accountin the complementary energy and then this element can be used to analyse eitherthin shells or morderate thick shells.Combined with the compatable element ofcurved beam,this hybrid element can be used to analyse the stiffened shells.Some minor problems about selecting the stress parameters in the element andthe boundary displacements of the element are discussed in this paper.In order toavoid the singularity,the rank of the transformation matrix[G]must not be lessthan n-1(n is the d.o.f.of the boundary displacements and 1 is the number ofthe rigid body motion).

本文基本修正的余能原理,在圆柱座标系内,提出了一种圆柱块杂交应力单元。单元内膜力与弯矩包括了完全线性项,切力为常值,边界有四个节点,20自由度。可用于薄壳,也可以计入横向剪切而用于厚一点的壳体,与曲梁协调元相组合,可以分析加筋壳。文中讨论了关于单元内应力与边界位移选定的某些问题。为避免奇异性,变换矩阵〔G〕的秩应不小于n-l(n 为边界位移自由度数,l 为单元刚体位移数目)。

Hybrid stress elements and isoparametric elements are adopted to calculate stress intensity factors and J-integral of plane cracks in this paper. At every crack tip, an array of singular hybrid stress elements as sectors with parabolical arcs is arranged. Each sector is connected to a quadrilateral isoparametric element with eight nodal points. The principle how to use the two types of elements mixedly is interpreted in this paper. The advantages of the method are the following.( 1 ) The singular elements...

Hybrid stress elements and isoparametric elements are adopted to calculate stress intensity factors and J-integral of plane cracks in this paper. At every crack tip, an array of singular hybrid stress elements as sectors with parabolical arcs is arranged. Each sector is connected to a quadrilateral isoparametric element with eight nodal points. The principle how to use the two types of elements mixedly is interpreted in this paper. The advantages of the method are the following.( 1 ) The singular elements adopted as sectors can give a better description of the hoop stress distribution in the vicinity of a crack tip;( 2 ) The isoparametric elements are adaptable to every kind of curve boundary, and simple and convenient to calculate;( 3 )J-integral can be calculated quite accurately in the isoparametric element region, so that it can be extended to elasto-plasticity calculation of plane cracks.Three numerical examples are given as follows:( 1 ) a rectangular sheet with equal length edge cracks in both sides;( 2 ) a rectangular sheet with a long crack in single side; ( 3 ) a rectangular sheet with a oblique crack.Every sheet is stressed under single uniform tensile load. 216-256 degrees of freedom are adopted in every example respectively. Comparison o f the obtained results with those of analytical and other singular element solutions shows that the values of the stress intensity factors obtained in every example, whether those were solved from the linear equations or came from J-integral values, are all in good agreement. The errors are only within 1 - 2 %. The scatter degrees of J-integrals from 4 - 6 integral pathes in each example are only within±0.7%.By carrying out practical calculations it is shown that the advantages of the method are high accuracy, reduced computer run time, and adaptability to practical application.

本文介绍一种用奇异性杂交应力元及等参元计算平面裂纹的应力强度因子和J积分的方法。实际计算表明,此种方法的优点是精度高,计算时间短,便于实际应用。文中给出三个算例。各例分别采用216~256个自由度。计算结果同解析解及其他奇异元的解进行了比较。各例算得的应力强度因子值,均同解析解相差仅1~2%。每例中由4~6条路径求得的J积分值,其分散度均在±O.7%以内。 计算在TQ-16机上进行,程序编译约6~7分钟,每例的计算时间约6~8分钟。

In the analysis of the finite element method, the variational principle has formed the basis of various modeles. In this paper, the generalized hybrid element has been established on the basis of the Hu-Washizu principle with relaxed continuity requirements. Existing hybrid elements, for example, stress hybrid element, displacement hybrid element and generalized hybrid stress element are special forms of the generalized hybrid element.In this paper, several new kinds of hybrid element are presented,...

In the analysis of the finite element method, the variational principle has formed the basis of various modeles. In this paper, the generalized hybrid element has been established on the basis of the Hu-Washizu principle with relaxed continuity requirements. Existing hybrid elements, for example, stress hybrid element, displacement hybrid element and generalized hybrid stress element are special forms of the generalized hybrid element.In this paper, several new kinds of hybrid element are presented, criterion for choicing field variables, convergent conditions and rank conditions are also discussed.In addition to general theoretical statements for various kinds of hybrid element. The formulations of these elements are listed, thus, some of the formulations easily for application are given in explicit form.

在有限元分析中,变分原理已成为建立各种有限元模型的依据,本文从放松连续性条件的胡海昌一鹫津广义变分原理出发建立了一类广义杂交元。现有的应力杂交模型,位移杂交模型,广义杂交应力模型,都可以看成是广义杂交模型的特殊形式。 本文还讨论了其他可能类型的新的杂交模型,以及这些单元的场变量选择原则,收敛要求及秩的条件。 除了对各类杂交元进行统一的理论分析外,还对各单元列式做了比较,指明其便于实际应用的形式。

 
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