Shape and stress sensing of multilayered composite and sandwich structures using an inverse finite element method
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/192290
Tipus de documentText en actes de congrés
Data publicació2013
EditorCIMNE
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
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Abstract
The marked increase in the use of composite and sandwich material systems in
aerospace, civil, and marine structures leads to the need for integrated Structural Health
Management systems. A key capability to enable such systems is the real-time reconstruction
of structural deformations, stresses, and failure criteria that are inferred from in-situ, discretelocation
strain measurements. This technology is commonly referred to as shape- and stresssensing.
Presented herein is a computationally efficient shape- and stress-sensing
methodology that is ideally suited for applications to laminated composite and sandwich
structures. The new approach employs the inverse Finite Element Method (iFEM) as a general
framework and the Refined Zigzag Theory (RZT) as the underlying plate theory. A threenode
inverse plate finite element is formulated. The element formulation enables robust and
efficient modeling of plate structures instrumented with strain sensors that have arbitrary
positions. The methodology leads to a set of linear algebraic equations that are solved
efficiently for the unknown nodal displacements. These displacements are then used at the
finite element level to compute full-field strains, stresses, and failure criteria that are in turn
used to assess structural integrity. Numerical results for multilayered, highly heterogeneous
laminates demonstrate the unique capability of this new formulation for shape- and stresssensing.
ISBN978-84-941407-6-1
Fitxers | Descripció | Mida | Format | Visualitza |
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Coupled-2013-26_Shape and stress sensing.pdf | 315,0Kb | Visualitza/Obre |