TY - JOUR

T1 - On the investigation of quasi-static crack resistance of thermoplastic tape layered composites with multiple delaminations

T2 - Approaches for quantification

AU - Khudiakova, Anastasiia

AU - Brunner, Andreas J.

AU - Wolfahrt, Markus

AU - Wettemann, Thomas

AU - Godec, Damir

AU - Pinter, Gerald

N1 - The research work was performed within the COMET project VI-2.06, ‘New strategies towards laser assisted manufacturing of fibre reinforced thermoplastic composites,’ at the Polymer Competence Center Leoben GmbH (PCCL, Austria) within the framework of the COMET program of the Federal Ministry for Transport, Innovation and Technology and the Federal Ministry of Science, Research and Economy with contributions by Technical University of Munich (Institute for Carbon Composites), Montanuniversitaet Leoben (Institute of Material Science and Testing of Polymers), AFPT and Cevotec. The PCCL is funded by the Austrian Government and the State Governments of Styria, Lower Austria and Upper Austria. Special thanks go to Sebastian Maar and Franz Grassegger for their assistance with the specimen preparations.

PY - 2021/10

Y1 - 2021/10

N2 - The present study is devoted to the quantitative characterisation of the interlayer bonding in unidirectional carbon fibre reinforced thermoplastic laminates produced by automated tape placement with in-situ consolidation (ATPisc). Two different manufacturing protocols were applied to produce the laminates that were further characterised using the quasi-static mode I double cantilever beam (DCB) test. Regardless of the manufacturing approach, the laminates exhibited multiple cracking accompanied by fibre bridging during testing, which affected the main mid-plane crack propagation. This effect was examined by comparing the crack length visually measured during testing with both the crack length back-calculated from the compliance and the crack length calculated using the flexural modulus and the compliance. In addition, the investigation of the evolution of the effective flexural modulus and the damage parameter throughout testing was performed for a better understanding of the damage accumulation in the specimens.

AB - The present study is devoted to the quantitative characterisation of the interlayer bonding in unidirectional carbon fibre reinforced thermoplastic laminates produced by automated tape placement with in-situ consolidation (ATPisc). Two different manufacturing protocols were applied to produce the laminates that were further characterised using the quasi-static mode I double cantilever beam (DCB) test. Regardless of the manufacturing approach, the laminates exhibited multiple cracking accompanied by fibre bridging during testing, which affected the main mid-plane crack propagation. This effect was examined by comparing the crack length visually measured during testing with both the crack length back-calculated from the compliance and the crack length calculated using the flexural modulus and the compliance. In addition, the investigation of the evolution of the effective flexural modulus and the damage parameter throughout testing was performed for a better understanding of the damage accumulation in the specimens.

KW - Automated tape placement (ATP)

KW - Delamination

KW - Fracture toughness

KW - Laminates

UR - http://www.scopus.com/inward/record.url?scp=85107685613&partnerID=8YFLogxK

U2 - 10.1016/j.compositesa.2021.106484

DO - 10.1016/j.compositesa.2021.106484

M3 - Article

AN - SCOPUS:85107685613

VL - 149.2021

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

SN - 1359-835X

IS - October

M1 - 106484

ER -