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Fatigue is a key factor for durable designs of composite structures. Delamination is the most important damage mechanisms for these materials. In many composite components delaminations grow under a varying mode mix that depends on the crack length. It is important to develop methods that can characterise subcritical, mixed-mode growth in fatigue delamination. The objective of this investigation is the characterisation of variable mixed-mode fatigue delamination in composite laminates. A mixed-mode fatigue delamination model is proposed. Opposite to literature mixed-mode fatigue delamination...