Experimental characterization and numerical modelling of the translaminar fracture of woven-ply hybrid fibers reinforced thermoplastic laminates

The understanding of fracture mechanisms and the assessment toughness are key factors to design high-performance composite structures be used in aeronautics. Thus, this work addresses influence initial notch orientation on translaminar woven-ply hybrid fibers reinforced thermoplastic polyether ether ketone (PEEK) laminates. Single-edge-notch bending (SENB) specimens is experimentally characterized depending two notches (0° 45°). Such geometry results a complex stress state within laminates plies as well simultaneous tension/compression failures. A full-field measurement technique has been implemented monitor crack initiation growth specimen surface during mechanical loading. To better understand role played by contribution behavior, specific Finite Element mesoscale model was built account for deformation (namely local plasticity) different damage behaviours (fiber breakage tension compression, kinking/crushing delamination) occurring quasi-isotropic Linear elastic mechanics concepts have applied quantify critical (about 40 kJ/m2 both cases). Finally, study provides useful information values engineers willing thermoplastic-based parts with concentrators.