The current work deals with the development of contact modelling capabilities in the framework of the Carrera Unified Formulation (CUF), which is a generalised framework for the development of advanced structural theories. The current modelling approach uses 1D elements with Lagrange polynomials being used to enhance the cross-section kinematic field, leading to a layer-wise model and involving purely displacement degrees of freedom. Such a modelling approach results in 3D-like accuracy of the solution, at a significantly reduced computational effort compared to standard 3D – FEA. The current work considers normal, frictionless contact with a node-to-node discretisation, and the penalty approach is used to enforce the contact constraints. The resulting nonlinear analysis is implicitly solved using the Newton-Raphson method. The use of layer-wise modelling in CUF results in a high-fidelity solution which is capable of accurately evaluating the interlaminar stress fields, as well as accounting for transverse stretching. The development is extended to the case of dynamic contact, which uses a combination of node-to-node discretisation and Lagrange Multiplier constraints to model contact. Initial assessments consider elastic impact between two bodies and demonstrate the capability of CUF models in accurately modelling contact/impact.

CONTACT MODELLING OF COMPOSITE STRUCTURES USING ADVANCED STRUCTURAL THEORIES / Nagaraj, M. H.; Kaleel, I.; Carrera, E.; Petrolo, M.. - ELETTRONICO. - (2019), pp. 1104-1112. ((Intervento presentato al convegno XXV International Congress of Aeronautics and Astronautics, AIDAA 2019 tenutosi a Rome nel 9-12 September 2019.

CONTACT MODELLING OF COMPOSITE STRUCTURES USING ADVANCED STRUCTURAL THEORIES

M. H. Nagaraj;I. Kaleel;E. Carrera;M. Petrolo
2019

Abstract

The current work deals with the development of contact modelling capabilities in the framework of the Carrera Unified Formulation (CUF), which is a generalised framework for the development of advanced structural theories. The current modelling approach uses 1D elements with Lagrange polynomials being used to enhance the cross-section kinematic field, leading to a layer-wise model and involving purely displacement degrees of freedom. Such a modelling approach results in 3D-like accuracy of the solution, at a significantly reduced computational effort compared to standard 3D – FEA. The current work considers normal, frictionless contact with a node-to-node discretisation, and the penalty approach is used to enforce the contact constraints. The resulting nonlinear analysis is implicitly solved using the Newton-Raphson method. The use of layer-wise modelling in CUF results in a high-fidelity solution which is capable of accurately evaluating the interlaminar stress fields, as well as accounting for transverse stretching. The development is extended to the case of dynamic contact, which uses a combination of node-to-node discretisation and Lagrange Multiplier constraints to model contact. Initial assessments consider elastic impact between two bodies and demonstrate the capability of CUF models in accurately modelling contact/impact.
978-88-943960-1-0
File in questo prodotto:
File Dimensione Formato  
Nagaraj_KCP_AIDAA2019.pdf

accesso aperto

Descrizione: Paper
Tipologia: 2a Post-print versione editoriale / Version of Record
Licenza: Creative commons
Dimensione 587.07 kB
Formato Adobe PDF
587.07 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2751833
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo