The large use of thin and thick shells as structural elements in many branches of engineering technologies, has gained an increased attention of scientists and engineers for the development of even more refined approaches, to investigate their mechanical behaviour. In this context, we propose a Higher-order Shear Deformation Theory (HSDT) to study the statics and/or dynamics of different anisotropic shells with a different geometries, including latticed panels and shells (also named as gridshells). Latticed, anisotropic and composite laminated structures are widely applied in the design of large-span buildings, such as stadia, courtyards, or aerospace structures, due to their high mass efficiency [1]. Their structural behaviour is generally studied by means of the classical finite element approach and/or continuous models. In this work, instead, we apply an alternative higher-order mechanical modelling of doubly-curved shells, based on a Differential Quadrature (DQ) or Integral Quadrature (IQ) method, to solve the fundamental equations of the problem in a strong or weak form [2-5]. The proposed approach is checked, first, in its accuracy and reliability, through a comparative evaluation between our results and predictions from literature. It follows a systematic investigation for different combinations of the geometrical and mechanical input parameters, which could be useful for practical design purposes of anisotropic shell element structures.
Advanced Higher-Order Mechanical Modelling of Anisotropic Doubly-Curved Shell Structures
Francesco Tornabene
;Rossana Dimitri
2020-01-01
Abstract
The large use of thin and thick shells as structural elements in many branches of engineering technologies, has gained an increased attention of scientists and engineers for the development of even more refined approaches, to investigate their mechanical behaviour. In this context, we propose a Higher-order Shear Deformation Theory (HSDT) to study the statics and/or dynamics of different anisotropic shells with a different geometries, including latticed panels and shells (also named as gridshells). Latticed, anisotropic and composite laminated structures are widely applied in the design of large-span buildings, such as stadia, courtyards, or aerospace structures, due to their high mass efficiency [1]. Their structural behaviour is generally studied by means of the classical finite element approach and/or continuous models. In this work, instead, we apply an alternative higher-order mechanical modelling of doubly-curved shells, based on a Differential Quadrature (DQ) or Integral Quadrature (IQ) method, to solve the fundamental equations of the problem in a strong or weak form [2-5]. The proposed approach is checked, first, in its accuracy and reliability, through a comparative evaluation between our results and predictions from literature. It follows a systematic investigation for different combinations of the geometrical and mechanical input parameters, which could be useful for practical design purposes of anisotropic shell element structures.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
