A numerical model was developed for the evolutive analysis of unidirectional fiber composites. The model is based on homogenization theory for periodic media and requires a single representative volume element (RVE) to be analyzed. The related structural problem is numerically solved by the finite element method. Particular attention is given to the boundary conditions that ensure the continuity of the displacement field across adjacent RVEs and the periodicity of the microscopic strain field. The results obtained for metal composites are compared with the findings of other authors: the importance of a correct enforcement of the boundary conditions to reliably estimate the macroscopic response is emphasized. For perfectly plastic composites, the numerical results agree with previously obtained theoretical predictions as far as the ultimate strength is concerned.

Omogeneizzazione di compositi fibrorinforzati a matrice elastoplastica

TALIERCIO, ALBERTO
1997-01-01

Abstract

A numerical model was developed for the evolutive analysis of unidirectional fiber composites. The model is based on homogenization theory for periodic media and requires a single representative volume element (RVE) to be analyzed. The related structural problem is numerically solved by the finite element method. Particular attention is given to the boundary conditions that ensure the continuity of the displacement field across adjacent RVEs and the periodicity of the microscopic strain field. The results obtained for metal composites are compared with the findings of other authors: the importance of a correct enforcement of the boundary conditions to reliably estimate the macroscopic response is emphasized. For perfectly plastic composites, the numerical results agree with previously obtained theoretical predictions as far as the ultimate strength is concerned.
1997
composites; homogenization; elastoplastic matrix
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/502809
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