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Journal of Composite Materials
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Finite Element Simulation of the Fiber–Matrix Debonding in Polymer Composites Produced by a Sliding Indentor: Part I – Normally Oriented Fibers

Klaus Friedrich

Institut für Verbundwerkstoffe (IVW GmbH), University of Kaiserslautern, D-67663 Kaiserslautern, Erwin-Schrödinger Str. Geb. 58, Germany

Tibor Goda

Karoly Varadi

Institute of Machine Design, Budapest University of Technology and Economics, H-1111 Budapest, Müegyetem rkp. 3., Hungary

Bernd Wetzel

Institut für Verbundwerkstoffe (IVW GmbH), University of Kaiserslautern, D-67663 Kaiserslautern, Erwin-Schrödinger Str. Geb. 58, Germany

To study the contact and debonding behaviors between a CF–PEEK fiber-reinforced polymer composite specimen and a sliding diamond indentor, finite element macro- and micro-models have been developed. Around each fiber, interface elements were introduced in order to detect the tension-type and also the shear-type debondings for different cases. If initial or final debonding has occurred, a "control algorithm" checked the limit strain conditions for the interface elements and changed the material properties according to the actual debonding condition. As a final result, it can be concluded, that the dominant debonding under compression is due to the shear loading conditions.

Key Words: fiber–matrix debonding • polymer composites • FEA (finite element analysis)

Journal of Composite Materials, Vol. 38, No. 18, 1583-1606 (2004)
DOI: 10.1177/0021998304043759
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T. Goda, K. VAradi, B. Wetzel, and K. Friedrich
Finite Element Simulation of the Fiber- Matrix Debonding in Polymer Composites Produced by a Sliding Indentor: Part II - Parallel and Anti-Parallel Fiber Orientation
Journal of Composite Materials, September 1, 2004; 38(18): 1607 - 1618.
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