不同缺陷率下温度场对三层环形板动力稳定性响应的影响

IF 0.7 Q4 MECHANICS
D. Pawlus
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引用次数: 0

摘要

本文讨论了温度场对含缺陷板动力稳定性问题的影响。主要目的是进行数值研究,以显示缺陷率和板在热环境中的动态响应之间的关系。该板由三层组成:薄面层和厚芯层。该板可以机械地和热地加载,或者仅热地加载。面层通过在平面内作用的力进行机械压缩。温度场模型由板边缘之间的温差定义。两个板模型如下:使用近似方法——正交化和有限差分——建立,并由有限元组成。分析和数值求解程序是主要的程序,这是进行问题分析的建议。通过仅热加载的板的临界温差的获得值以及通过机械加载并经受非耦合温度场的板的关键机械载荷和相应的温差来描述板反应。板缺陷率在随时间变化的载荷下的影响通过大量的观察和结果显示出来,这些观察和结果以图形形式显示。研究了缺陷率对板在复杂荷载条件下的动力稳定响应的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Temperature Field Effect on Dynamic Stability Response of Three-layered Annular Plates for Different Ratios of Imperfection
Abstract The paper presents the temperature field effect on the dynamic stability problem of plates with imperfection. The main objective is to conduct numerical investigations which show the relations between the imperfection ratio and plate dynamic response in a thermal environment. The plate is composed of three layers: thin facings and a thicker core. The plate can be loaded mechanically and thermally or only thermally. The facings are mechanically compressed with the forces acting in a plane. The temperature field model is defined by the temperature difference, which occurs between the plate edges. Two plate models are examined as follows: built using the approximation methods – orthogonalization and finite differences – and composed of finite elements. The analytical and numerical solution procedure is the main one, which is the proposal to perform the problem analysis. The plate reaction is described by the obtained values of the critical temperature differences for plates loaded only thermally and by the critical mechanical loads and the corresponding temperature differences for plates loaded mechanically and subjected to the uncoupled temperature field. The effect of the plate imperfection ratio under time-dependent loads is shown by numerous observations and results, which are shown graphically. The importance of the imperfection ratio on the plate's dynamic stability response in complex loading conditions is studied.
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来源期刊
CiteScore
1.30
自引率
16.70%
发文量
20
审稿时长
16 weeks
期刊介绍: An international journal ‘Studia Geotechnica et Mechanica’ covers new developments in the broad areas of geomechanics as well as structural mechanics. The journal welcomes contributions dealing with original theoretical, numerical as well as experimental work. The following topics are of special interest: Constitutive relations for geomaterials (soils, rocks, concrete, etc.) Modeling of mechanical behaviour of heterogeneous materials at different scales Analysis of coupled thermo-hydro-chemo-mechanical problems Modeling of instabilities and localized deformation Experimental investigations of material properties at different scales Numerical algorithms: formulation and performance Application of numerical techniques to analysis of problems involving foundations, underground structures, slopes and embankment Risk and reliability analysis Analysis of concrete and masonry structures Modeling of case histories
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