TY - JOUR
T1 - Characterization and analysis of the mode I interlaminar fatigue behaviour of thermoplastic composites considering R-curve effects
AU - Leciñana, I.
AU - Renart, J.
AU - Turon, A.
AU - Zurbitu, J.
AU - Tijs, B. H.A.H.
PY - 2023
Y1 - 2023
N2 - Through the application of innovative production processes, thermoplastic composites might help the aviation industry become more sustainable. However, there is currently not much experimental understanding on the fatigue behaviour, and validated analysis methodologies on thermoplastic composites are rather limited. In this work, the fatigue onset and propagation interlaminar properties of AS4D/PEKK-FC thermoplastic composite were characterized under mode I loading. Testing costs were reduced by using a multi-fatigue testing rig that allows loading 6 specimens at the same time. The offset in the fatigue crack growth rate curves tested at different severities was explained by the fatigue R-curve effects. The offset was modelled by means of superposed fatigue cohesive laws. Different approaches on how to consider fatigue damage were compared with experimental data, giving an insight on how fatigue damage evolves, and developing a novel modelling strategy based on a robust method for fatigue model parameter identification for fatigue delamination when several failure mechanisms interact.
AB - Through the application of innovative production processes, thermoplastic composites might help the aviation industry become more sustainable. However, there is currently not much experimental understanding on the fatigue behaviour, and validated analysis methodologies on thermoplastic composites are rather limited. In this work, the fatigue onset and propagation interlaminar properties of AS4D/PEKK-FC thermoplastic composite were characterized under mode I loading. Testing costs were reduced by using a multi-fatigue testing rig that allows loading 6 specimens at the same time. The offset in the fatigue crack growth rate curves tested at different severities was explained by the fatigue R-curve effects. The offset was modelled by means of superposed fatigue cohesive laws. Different approaches on how to consider fatigue damage were compared with experimental data, giving an insight on how fatigue damage evolves, and developing a novel modelling strategy based on a robust method for fatigue model parameter identification for fatigue delamination when several failure mechanisms interact.
KW - Fatigue characterization
KW - Fatigue cohesive zone model
KW - Fibre bridging
KW - Resistance curve
UR - http://www.scopus.com/inward/record.url?scp=85159051292&partnerID=8YFLogxK
U2 - 10.1016/j.engfracmech.2023.109273
DO - 10.1016/j.engfracmech.2023.109273
M3 - Article
AN - SCOPUS:85159051292
SN - 0013-7944
VL - 286
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
M1 - 109273
ER -