共查询到19条相似文献,搜索用时 93 毫秒
1.
ACONDENSEDMETHODFORLINEARCOMPLEMENTARYEQUATIONSOFELASTO-PLASTICPROBLEMSYinFuxin(殷福新)SunHuanchun(孙焕纯)(ReceivedJuly25.1994)ACON... 相似文献
2.
THEEXACTSOLUTIONSOFELASTIC-PLASTICCRACKLINEFIELDFORMODEⅡPLANESTRESSCRACKYiZhijian(易志坚)WangShijie(王士杰)WangXiangjian(王向坚)(Recei... 相似文献
3.
THEMECHANICALMETHODOFCONSTRUCTINGTHEDISPLACEMENTFUNCTIONSINELASTICITY*//ZhangHong-qing(张鸿庆)FengHong(冯红)(InstituteofMathematic... 相似文献
4.
THE EXACT SOLUTIONS OF ELASTIC-PLASTIC CRACK LINE FIELD FOR MODE ⅡPLANE STRESS CRACK 总被引:1,自引:2,他引:1
THEEXACTSOLUTIONSOFELASTIC-PLASTICCRACKLINEFIELDFORMODEIIPLANESTRESSCRACKYiZhijian(易志坚)WangShijie(王士杰)WangXiangjian(王向坚)(Rece... 相似文献
5.
何宗彦 《应用数学和力学(英文版)》1996,17(3):257-268
(何宗彦)ELASTIC-PLASTICCONSTITUTIVEMODELSBASEDONTHEMULTIPLICATIONPROCESSESOFDEFORMEDGRAINS¥HeZongyan(DepartmentofEngineerMechani... 相似文献
6.
THECALCULATIONOFTHEMULTIPLY-CONNECTEDELASTICPLANEPROBLEMSBYMEANSOFSTRESSFUNCTIONSOFMULTIPLECOMPLEXVARIABLESwangLindiang(王林江)L... 相似文献
7.
ANALYSISOFCOMPLEXSTRESSINTENSITIESFORCRACKEDLAMINATESHuHurang(胡互让);WuChengping(吴承平)(DepartmentofMechanical.AerospaceandManufa... 相似文献
8.
翁宗诒 《应用数学和力学(英文版)》1995,16(12):1221-1230
ANANALYSISOFTHEPOST-BUCKLINGOFLAMINATEDPLATESOFSYMMETRICCROSS-PLYWengZongyi(翁宗诒)(ReceivedMarch6,1995,CommunicatedbyZhouChengt... 相似文献
9.
高扬 《应用数学和力学(英文版)》1996,17(10):953-968
CONTACTPROBLEMSANDDUALVARIATIONALINEQUALITYOF2-DELASTOPLASTICBEAMTHEORYDavidYangGao(高扬)(DepartmentofMathematics.VirginiaPolyt... 相似文献
10.
ASTUDYOFTHEELASTO-PLASTICAXIALLYTENSILEPROPERTIESOFMETALMATRIXCOMPOSITESWITHFIBER-ENDDEBONDINGSuXiaofeng(苏晓风)ChenHaoran(陈浩然)(... 相似文献
11.
An efficient finite element formulation is presented for geometrical nonlinear elasto-plastic analyses of tensegrity systems based on the co-rotational method. Large displacement of a space rod element is decomposed into a rigid body motion in the global coordinate system and a pure small deformation in the local coordinate system. A new form of tangent stiffness matrix, including elastic and elasto-plastic stages is derived based on the proposed approach. An incremental-iterative solution strategy in conjunction with the Newton-Raphson method is employed to obtain the geometrical nonlinear elasto-plastic behavior of tensegrities. Several numerical examples are given to illustrate the validity and efficiency of the proposed algorithm for geometrical nonlinear elasto-plastic analyses of tensegrity structures. 相似文献
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13.
Chen Haoran Su Xiaofeng Tang Limin 《Acta Mechanica Solida Sinica》1996,9(1):52-58
The generalized self-consistent finite-element iterative averaging method was adopted toanalyze the elasto-plastic tensile properties of SiC whiskers reinforced aluminum matrix composites.The effects of varying fiber's aspect ratio and volume fraction on the macroscopic elasto-plastic defor-mation of the composites were studied.By the analysis of microscopic stress fields,the relation be-tween the propagation of the elasto-plastic region in the matrix and the macroscopic elasto-plastic de-formation of composites was discussed.It was found that the propagation of the plastic region in thematrix between the fiber's ends would affect prominently the elasto-plastic tensile behaviour of thecomposites.It was shown that the characterization of the stress-strain response in terms of the 0.2%offset yield strength is incomplete. 相似文献
14.
Based on the elasto-plastic mechanics, the damage analysis and dynamic response of an elasto-plastic laminated composite shallow spherical shell under low velocity impact are carried out in this paper. Firstly, a yielding criterion related to spherical tensor of stress is proposed to model the mixed hardening orthotropic material, and accordingly an incremental elasto-plastic damage constitutive relation for the laminated shallow spherical shell is founded when a strain-based Hashin failure criterion is applied to assess the damage initiation and propagation. Secondly, using the presented constitutive relations and the classical nonlinear shell theory, a series of incremental nonlinear motion equations of orthotropic moderately thick laminated shallow spherical shell are obtained. The questions are solved by using the orthogonal collocation point method, Newmark method and iterative method synthetically. Finally, a modified elasto-plastic contact law is developed to determine the normal contact force and the effect of damage, geometrical parameters, elasto-plastic contact and boundary conditions on the contact force and the dynamic response of the structure under low velocity impact are investigated. 相似文献
15.
采用弹塑性理论,建立了沥青路面弹塑性动力响应分析的三维有限元模型,利用有限元法分析了沥青路面的弹性和弹塑性动力响应、以及弹塑性状态下层间接触对沥青路面力学性能的影响.结果表明:在相同条件下,沥青路面为弹塑性状态时得到的弯沉和最大主应变均比弹性状态时大;卸载后,弹塑性状态时存在残余变形,说明沥青路面的弹塑性动力学响应分析得到的结果和路面实际情况较符合;沥青路面在弹塑性状态下,层间完全光滑时其弯沉是完全连续时的6 倍,上面层最大竖向应变是层间连续时的3.7 倍,下面层处最大竖向应变是层间连续时的2.3 倍;卸载后,层间完全光滑时,面层A 点与B 点均存在残余应变;随着层间摩擦系数的增大,路面弯沉值减少,说明在弹塑性状态下,层间接触状态对沥青路面的动力响应有较大影响. 相似文献
16.
Based on the elasto-plastic theory, considering the effect of spherical stress tensor on the elasto-plastic deformation and using the slicing treatment to deal with the plasticity of functionally graded coatings, the elasto-plastic increment constitutive equations of the sandwich plates with functionally graded metal-metal face sheets can be derived. Applying the weak bonded theory to the interfacial constitutive relation and taking into account the geometric nonlinearity, the nonlinear increment differential equilibrium equations of the sandwich plates with functionally graded metal-metal face sheets are obtained by the minimum potential energy principle. The finite difference method and the iterative method are used to obtain the post-buckling path. When the effect of geometrical nonlinearity of the plate is ignored, the elasto-plastic critical buckling load of the sandwich plates with functionally graded metal-metal face sheets can be solved by the Galerkin method and the iterative method. In the numerical examples, the effects of the interface damages, the induced load ratio, the functionally graded index, and the geometry parameters on the elasto-plastic post-buckling path and the elasto-plastic critical buckling load are investigated. 相似文献
17.
摩擦接触弹塑性分析的数学规划法 总被引:4,自引:0,他引:4
本文提出摩擦接触弹塑性分析的数学规划法,是弹性接触问题解法的推广,使之能处理比例加载时的塑性效应。利用所导出接触问题总刚度阵的逆,结合参变量线性互补公式,仍可消去由接触单元而引入的惩罚因子。于是,可以获得一个弹塑性问题、弹性接触和弹塑性接触问题的有限元参数二次规划法模型。所选的几个实例说明了方法的实用性。 相似文献
18.
《International Journal of Solids and Structures》1999,36(21):3215-3237
This work presents a novel formulation of the scaling function of the intrinsic timescale. The new formulated scaling function and the rate-sensitivity function are used in theendochronic theory to simulate the rate-dependent elasto-plastic behaviors of materials. Severalcases of rate-dependent elasto-plastic material responses are discussed separately. Experimentaldata found in literature of 304 stainless steels and Ti7Al2Cb1Tatitanium alloy for rate-dependent elasto-plastic responses are used for comparison. It is shownthat the theory adequately simulates the experimental results. 相似文献