TY - GEN
T1 - A cycle-by-cycle fatigue damage analysis of biaxial composite structures utilizing acoustic emission
AU - Zarouchas, D. S.
AU - Pascoe, J. A.
AU - Alderliesten, R. C.
PY - 2020
Y1 - 2020
N2 - In the present work, a fatigue damage analysis of biaxial Carbon Fibre Reinforced Polymer (CFRP) specimens loaded at two different stress levels and a fatigue ratio, R=0.1, was performed. A cycle-by-cycle approach was used, utilizing results from Acoustic Emission (AE) measurements. The aim was to investigate the influence of the applied maximum stress level on the fatigue damage accumulation process and to examine the hypothesis that damage growth occurs in a portion of a load cycle. It was found that the damage process, for the specimens loaded in lower applied stress, was gradually increased where different damage mechanisms evolved slowly towards the end of life. On the other hand, for the specimens loaded in higher applied stress, the damage process accumulated evenly and several failure mechanisms occurred in parallel at a very early stage of the fatigue life. Finally, for both loading cases, a load threshold was found, below which, there was no damage growth, supporting the hypothesis of this work.
AB - In the present work, a fatigue damage analysis of biaxial Carbon Fibre Reinforced Polymer (CFRP) specimens loaded at two different stress levels and a fatigue ratio, R=0.1, was performed. A cycle-by-cycle approach was used, utilizing results from Acoustic Emission (AE) measurements. The aim was to investigate the influence of the applied maximum stress level on the fatigue damage accumulation process and to examine the hypothesis that damage growth occurs in a portion of a load cycle. It was found that the damage process, for the specimens loaded in lower applied stress, was gradually increased where different damage mechanisms evolved slowly towards the end of life. On the other hand, for the specimens loaded in higher applied stress, the damage process accumulated evenly and several failure mechanisms occurred in parallel at a very early stage of the fatigue life. Finally, for both loading cases, a load threshold was found, below which, there was no damage growth, supporting the hypothesis of this work.
KW - Acoustic emission
KW - Cycle-by-cycle analysis
KW - Fatigue damage accumulation
UR - http://www.scopus.com/inward/record.url?scp=85084160111&partnerID=8YFLogxK
M3 - Conference contribution
T3 - ECCM 2018 - 18th European Conference on Composite Materials
BT - ECCM 2018 - 18th European Conference on Composite Materials
PB - Applied Mechanics Laboratory
T2 - 18th European Conference on Composite Materials, ECCM 2018
Y2 - 24 June 2018 through 28 June 2018
ER -