A method to control delaminations in composites for adjusted energy dissipation characteristics

Publication date: 5 June 2017
Source:Materials & Design, Volume 123
Author(s): M. Kuhtz, A. Hornig, M. Gude, H. Jäger
Concepts to adjust the delamination behaviour of textile reinforced composites are investigated. The composite interfaces are modified by adjusting the interlaminar contact area using perforated PTFE-foils. According mode I and mode II energy release rates are determined and a progressive correlation between the interlaminar contact area and energy release rates is identified. The results are exploited within three point bending experiments to adapt the structural delamination and subsequent energy dissipation behaviour with the proposed interface modification concept. Two structural designs concepts are evaluated numerically: adjusting structural energy dissipation capacity and adjusting the peak levels as well as the characteristic trends of the structural reactive forces. It is demonstrated, that the mechanical response of composite structures can be tailored by controlling their delamination behaviour.

Graphical abstract

http://ift.tt/2mTamlt