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Study and localization by the nonlinear acoustic technique of the damage to the fiber-matrix interface of a bio-composite

Attemane A., Mokaddem A., Doumi B., Boutaleb M., Temimi L., Boutaous A.

Mechanics and Mechanical Engineering

2017

Vol. 21, nr 3

453--465

The objective of this paper is to study the effect of dissipated energy on the damage to the fiber-matrix interface of a Hemp/Pla bio-composite, localized by the non-linear acoustic technique. For this purpose, we used the model defining energy dissipation during a charge/discharge cycle in our numerical simulation based on the Weibull probabilistic model and Cox model. We found that the energy dissipated is directly related to the damage; and when the damage increases the dissipated energy increases rapidly in the first cycles (1, 2,3 and 4) and very quickly for the last charge/discharge cycles (5,6 and 7). We concluded that the energy dissipated showed the state of degradation of Biocomposite prior to its start-up, and that the non-linear acoustic technique also indicates and confirms the same results found.