A study of the development of impact damage in cross-ply carbon fibre/PEEK laminates using acoustic emission

1988 ◽  
Vol 31 (1) ◽  
pp. 1-14 ◽  
Author(s):  
J.A. Nixon ◽  
M.G. Phillips ◽  
D.R. Moore ◽  
R.S. Prediger
Keyword(s):  
Acoustic Emission ◽  
Carbon Fibre ◽  
Impact Damage

Acoustic Emission Monitoring of Defects in Buckling CFRP Composite Panels

2006 ◽  
Vol 13-14 ◽  
pp. 259-266 ◽  
Author(s):  
Mark J. Eaton ◽  
Karen M. Holford ◽  
C.A. Featherston ◽  
Rhys Pullin
Keyword(s):  
Acoustic Emission ◽  
Carbon Fibre ◽  
Optical Measurement ◽  
Impact Damage ◽  
Fibre Composite ◽  
Carbon Fibre Composite ◽  
Premature Failure ◽  
Full Field ◽  
Cfrp Composite ◽  
Acoustic Emission Sensors

The presence of impact damage in a carbon fibre composite can reduce its capacity to support an in-plane load, which can lead to an unexpected or premature failure. This paper reports on an investigation into two slender carbon/fibre epoxy panels, one un-damaged and one with an artificial delamination introduced using an embedded section of PTFE. The reported tests form part of a larger series of investigations using differing sizes of artificial delamination and real impact damage. An investigation of wave velocity propagation at varying angles to the composite lay up was completed to assist in source location. The specimens were loaded under, uniaxial in-plane loading and monitored using four resonant acoustic emission sensors. A full field optical measurement system was used to measure the global displacement of the specimens. Analysis of AE waveforms and AE hit rate were used to assess the buckling of the panel. The results compared favourably with the optical measurement results.

Some Observations on Acoustic Emission during Continuous Tensile Cycling of a Carbon Fibre/Epoxy Composite

1972 ◽  
Vol 237 (74) ◽  
pp. 78-80 ◽  
Author(s):  
H. C. KIM ◽  
A. P. RIPPER NETO ◽  
R. W. B. STEPHENS
Keyword(s):  
Acoustic Emission ◽  
Carbon Fibre ◽  
Epoxy Composite

Damage assessment of carbon fibre reinforced plastic using acoustic emission technique: experimental and numerical approach

2020 ◽  
pp. 147592172094643
Author(s):  
Claudia Barile ◽  
Caterina Casavola ◽  
Giovanni Pappalettera ◽  
Vimalathithan Paramsamy Kannan
Keyword(s):  
Finite Element ◽  
Acoustic Emission ◽  
Carbon Fibre ◽  
Crack Length ◽  
Research Work ◽  
Numerical Approach ◽  
Acoustic Energy ◽  
Reinforced Plastics ◽  
Reinforced Plastic ◽  
Carbon Fibre Reinforced Plastic

In this research work, the acoustic emission results obtained from testing double cantilever beam specimens with carbon fibre reinforced plastic laminates are analysed. The acoustic emission descriptors such as amplitude, frequency centroid, counts, duration and risetime are clustered using k-means++ algorithm. An unconventional and innovative way of using the acoustic emission descriptors, after the clustering, is introduced. This method can favourably be used for relating the different damage progression modes in fibre reinforced plastics. Apart from this, the cumulative acoustic energy is used for predicting the crack length of the specimens. The predicted crack length is almost identical to the actual crack length opening recorded in each specimen. Finally, analytical and finite element models are used for validating the experimental results under the mode I delamination. The finite element studies are carried out using cohesive zone modelling in Comsol Multiphysics® platform.

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