{"title":"网格加固复合环形球壳的侧向屈曲","authors":"M. Zarei, G. H. Rahimi","doi":"10.1007/s40997-024-00779-6","DOIUrl":null,"url":null,"abstract":"<p>The present paper investigates the buckling behavior of grid-stiffened composite annular spherical shells with geodesic lattice cores subjected to external pressure, using analytical and numerical approaches. Using a smeared stiffener technique, the grid structure is transformed into an equivalent composite layer. To achieve the overall stiffness of the grid-stiffened shell, the stiffness of the stiffeners should be superimposed by the stiffness of the shells. The governing equations are formulated based on the classical Donnell’s thin shell theory. The Galerkin method has been applied to extract the buckling loads. To corroborate the analytical results, a finite element model is provided. The comparisons indicate satisfactory agreement between the two approaches. Moreover, the effect of meridian angle, stiffener orientation, and skin thickness are investigated. The results obtained are new and can be used for future studies.</p>","PeriodicalId":49063,"journal":{"name":"Iranian Journal of Science and Technology-Transactions of Mechanical Engineering","volume":"40 1","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Lateral Buckling of Grid-Stiffened Composite Annular Spherical Shells\",\"authors\":\"M. Zarei, G. H. Rahimi\",\"doi\":\"10.1007/s40997-024-00779-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The present paper investigates the buckling behavior of grid-stiffened composite annular spherical shells with geodesic lattice cores subjected to external pressure, using analytical and numerical approaches. Using a smeared stiffener technique, the grid structure is transformed into an equivalent composite layer. To achieve the overall stiffness of the grid-stiffened shell, the stiffness of the stiffeners should be superimposed by the stiffness of the shells. The governing equations are formulated based on the classical Donnell’s thin shell theory. The Galerkin method has been applied to extract the buckling loads. To corroborate the analytical results, a finite element model is provided. The comparisons indicate satisfactory agreement between the two approaches. Moreover, the effect of meridian angle, stiffener orientation, and skin thickness are investigated. The results obtained are new and can be used for future studies.</p>\",\"PeriodicalId\":49063,\"journal\":{\"name\":\"Iranian Journal of Science and Technology-Transactions of Mechanical Engineering\",\"volume\":\"40 1\",\"pages\":\"\"},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2024-07-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Iranian Journal of Science and Technology-Transactions of Mechanical Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1007/s40997-024-00779-6\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iranian Journal of Science and Technology-Transactions of Mechanical Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s40997-024-00779-6","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Lateral Buckling of Grid-Stiffened Composite Annular Spherical Shells
The present paper investigates the buckling behavior of grid-stiffened composite annular spherical shells with geodesic lattice cores subjected to external pressure, using analytical and numerical approaches. Using a smeared stiffener technique, the grid structure is transformed into an equivalent composite layer. To achieve the overall stiffness of the grid-stiffened shell, the stiffness of the stiffeners should be superimposed by the stiffness of the shells. The governing equations are formulated based on the classical Donnell’s thin shell theory. The Galerkin method has been applied to extract the buckling loads. To corroborate the analytical results, a finite element model is provided. The comparisons indicate satisfactory agreement between the two approaches. Moreover, the effect of meridian angle, stiffener orientation, and skin thickness are investigated. The results obtained are new and can be used for future studies.
期刊介绍:
Transactions of Mechanical Engineering is to foster the growth of scientific research in all branches of mechanical engineering and its related grounds and to provide a medium by means of which the fruits of these researches may be brought to the attentionof the world’s scientific communities. The journal has the focus on the frontier topics in the theoretical, mathematical, numerical, experimental and scientific developments in mechanical engineering as well
as applications of established techniques to new domains in various mechanical engineering disciplines such as: Solid Mechanics, Kinematics, Dynamics Vibration and Control, Fluids Mechanics, Thermodynamics and Heat Transfer, Energy and Environment, Computational Mechanics, Bio Micro and Nano Mechanics and Design and Materials Engineering & Manufacturing.
The editors will welcome papers from all professors and researchers from universities, research centers,
organizations, companies and industries from all over the world in the hope that this will advance the scientific standards of the journal and provide a channel of communication between Iranian Scholars and their colleague in other parts of the world.