“…The theory and applicability of various projection-based model order reduction methods such as component mode synthesis [13,7], the reduced basis method [14,15,16], the proper orthogonal decomposition [17,18,2] which will be used in this work, the a priori hyperreduction method [19,20] or the proper generalised decomposition [21,22,23] are now well-established in the linear to mildly nonlinear cases. Some attempts have been proposed to extend this concept to strong nonlinearities, in particular in structural mechanics [24,19,25,26]. This background makes it conceivable to use such methods in complex engineering problems such as fracture mechanics.…”