Ítem


Cohesive Elements for Shells

A cohesive element for shell analysis is presented. The element can be used to simulate the initiation and growth of delaminations between stacked, non-coincident layers of shell elements. The procedure to construct the element accounts for the thickness offset by applying the kinematic relations of shell deformation to transform the stiffness and internal force of a zero-thickness cohesive element such that interfacial continuity between the layers is enforced. The procedure is demonstrated by simulating the response and failure of the Mixed Mode Bending test and a skin-stiffener debond specimen. In addition, it is shown that stacks of shell elements can be used to create effective models to predict the inplane and delamination failure modes of thick components. The results indicate that simple shell models can retain many of the necessary predictive attributes of much more complex 3D models while providing the computational efficiency that is necessary for design

National Aeronautics and Space Administration

Autor: Dávila, Carlos G.
Camanho, Pedro Manuel Ponces Rodrigues de Castro
Turon Travesa, Albert
Resum: A cohesive element for shell analysis is presented. The element can be used to simulate the initiation and growth of delaminations between stacked, non-coincident layers of shell elements. The procedure to construct the element accounts for the thickness offset by applying the kinematic relations of shell deformation to transform the stiffness and internal force of a zero-thickness cohesive element such that interfacial continuity between the layers is enforced. The procedure is demonstrated by simulating the response and failure of the Mixed Mode Bending test and a skin-stiffener debond specimen. In addition, it is shown that stacks of shell elements can be used to create effective models to predict the inplane and delamination failure modes of thick components. The results indicate that simple shell models can retain many of the necessary predictive attributes of much more complex 3D models while providing the computational efficiency that is necessary for design
Accés al document: http://hdl.handle.net/2072/217648
Llenguatge: eng
Editor: National Aeronautics and Space Administration
Drets: Tots els drets reservats
Matèria: Materials laminats
Laminated materials
Materials compostos
Composite materials
Materials compostos -- Mètodes de simulació
Composite materials -- Simulation methods
Títol: Cohesive Elements for Shells
Tipus: info:eu-repo/semantics/article
Repositori: Recercat

Matèries

Autors