The objective of the present work is to investigate progressive damage in fibre-reinforced composites under varying load conditions, and in particular transverse impact loads, using a global-local approach. The numerical models are built using higher-order structural theories based on the Carrera Unified Formulation (CUF). The node-dependent kinematics (NDK) technique, an intrinsic feature of CUF models, is employed which enables the selective refinement of critical regions of interest within the structure and results in a global-local analysis. Progressive damage is governed by the CODAM2 material model, which is based on continuum damage mechanics. A series of numerical assessments are performed on composite laminates under varying load conditions, and predicted results of the global-local analysis are found to be in good agreement with experimental data, thereby validating the proposed approach. A comparison of its performance with reference high-fidelity CUF models of the full structure demonstrates the computational efficiency that can be achieved using the CUF-NDK global-local approach.

A global-local approach to the high-fidelity impact analysis of composite structures based on node-dependent kinematics / Nagaraj, N. H.; Carrera, E.; Petrolo, M.. - ELETTRONICO. - (2022). ((Intervento presentato al convegno 25th International Conference on Composite of Structures - ICCS25 tenutosi a Porto nel 19-22 July 2022.

A global-local approach to the high-fidelity impact analysis of composite structures based on node-dependent kinematics

E. Carrera;M. Petrolo
2022

Abstract

The objective of the present work is to investigate progressive damage in fibre-reinforced composites under varying load conditions, and in particular transverse impact loads, using a global-local approach. The numerical models are built using higher-order structural theories based on the Carrera Unified Formulation (CUF). The node-dependent kinematics (NDK) technique, an intrinsic feature of CUF models, is employed which enables the selective refinement of critical regions of interest within the structure and results in a global-local analysis. Progressive damage is governed by the CODAM2 material model, which is based on continuum damage mechanics. A series of numerical assessments are performed on composite laminates under varying load conditions, and predicted results of the global-local analysis are found to be in good agreement with experimental data, thereby validating the proposed approach. A comparison of its performance with reference high-fidelity CUF models of the full structure demonstrates the computational efficiency that can be achieved using the CUF-NDK global-local approach.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2970235