Publication :


Title:

Spatial Evolution of the Thickness Variations over a CFRP Laminated Structure

Authors: Y. Davila, L. Crouzeix, B. Douchin, F. Collombet and Y.-H. Grunevald
Year: octobre 2017
Journal: Applied Composite Materials.
Volume: 24, Number: 5, Pages: 1201-1215

DOI: 10.1007/s10443-016-9573-5

Abstract:
Ply thickness is one of the main drivers of the structural performance of a composite part. For stress analysis calculations (e.g., finite element analysis), composite plies are commonly considered to have a constant thickness compared to the reality (coefficients of variation up to 9% of the mean ply thickness). Unless this variability is taken into account reliable property predictions cannot be made. A modelling approach of such variations is proposed using parameters obtained from a 16-ply quasi-isotropic CFRP plate cured in an autoclave. A discrete Fourier transform algorithm is used to analyse the frequency response of the observed ply and plate thickness profiles. The model inputs, obtained by a mathematical representation of the ply thickness profiles, permit the generation of a representative stratification considering the spatial continuity of the thickness variations that are in good agreement with the real ply profiles spread over the composite part. A residual deformation FE model of the composite plate is used to illustrate the feasibility of the approach.

Bibtex citation :
@article{Davila2017,
Author={Davila, Y. and Crouzeix, L. and Douchin, B. and Collombet, F. and Grunevald, Y.-H.},
Title={Spatial Evolution of the Thickness Variations over a CFRP Laminated Structure},
Journal={Applied Composite Materials},
Month={october},
Volume={24},
Number={5},
Pages={1201-1215},
Year={2017}}


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