RESEARCH ARTICLE


Mechanical Characterization of Sheet Moulding Composites for the Automotive Industry



G. Lamanna*, A. Ceparano
Department of Industrial and Information Engineering – Second University of Naples, via Roma no. 29 – 81031 Aversa, Italy.


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© 2014 Lamanna and Ceparano;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Industrial and Information Engineering – Second University of Naples, via Roma no. 29 – 81031 Aversa, Italy; Tel: +390815010419; Fax: +390815010295; E-mail: giuseppe.lamanna@unina2.it


Abstract

The mechanical properties of Sheet Moulding Composite (SMC) have been analyzed by means of static and fatigue tests in tension. SMCs show a substantial in-plane anisotropy either in terms of stiffness or strength. Fatigue data were modeled adopting a fatigue model with two parameters, represented by the cyclic number and the mean stress. The statistical implementation of such model was based on the hypothesis that the monotonic tensile strength follows a twoparameter Weibull distribution. The model has the potential to be predictive indicating that the fatigue characterization of a given laminate can be achieved with a minimum number of experimental tests. The reliability of such procedure and its applicability limits are discussed in the light of the model parameters obtained for different glass fiber reinforced composites.

Keywords: Anisotropy, fatigue, SMC, tensile strength distribution.