Constructal design method dealing with stiffened plates and symmetry boundaries  

作　　者：Rodrigo R.Amaral Grégori S.Troina Cristiano Fragassa Ana Pavlovic Marcelo L.Cunha Luiz A.O.Rocha Elizaldo D.dos Santos Liércio A.Isoldi 

机构地区：[1]School of Engineering,Federal University of Rio Grande,Rio Grande,Brazil [2]Advanced Applications in Mechanical Engineering and Materials Technology,University of Bologna,Bologna,Italy [3]Departament of Mechanical Engineering,University of Vale do Rio dos Sinos,São Leopoldo,Brazil

出　　处：《Theoretical & Applied Mechanics Letters》2020年第5期366-376,共11页力学快报（英文版）

基　　金：the CAPES(Coordination for the Improvement of Higher Education Personnel),finance code 001;FAPERGS(Foundation for Research Support of the State of Rio Grande do Sul),CNPq(Brazilian National Council for Scientific and Technological Development)and the Italian Minister of Foreign Affairs and International Cooperation(MAECI),as part of the"Two Seats for a Solar Car"international project.

摘　　要：A new computational procedure for modelling the structural behavior of stiffened plates with symmetry boundary conditions is here presented.It uses two-dimensional finite elements as a way to decrease computational time without losing precision thanks to a relatively small number of elements applied for analyzing out-of-plane displacements(deflections)and stresses.Adding,the constructal design method was included in the procedure,together with the exhaustive search technique,with the scope to optimize the stress/strain status of stiffened plates by design changes.For the purpose,a reference plate without stiffeners was initially design and used as starting point.Part of the volume was reshaped into stiffeners:thickness was reduced maintaining unchanged weight,length and width.The main goal was to minimize strains and stresses by geometric changes.Results demonstrated that,thanks to this design procedure,it is always possible to find an adequate geometry transformation from reference plate into stiffeners,allowing significant improvements in mechanical behavior.

关 键 词：Deflection minimization Stress minimization Optimal design Plates with stiffeners Bending 

分 类 号：TU318[建筑科学—结构工程]