Flexural behaviour after tension-tension fatigue testing of cross-ply laminates made of carbon/epoxy ultra-thin plies

After the experimental testing of two different cross-ply laminates under T-T cycling loading (stress ratio R=0.1), their damage scenarios have been analysed in order to compare their subsequent flexural performance. A [04/903/04] laminate made of conventional thickness plies (150gsm) and a [04/90/0...

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Bibliographic Details
Main Authors: Sánchez-Carmona, Serafín, Barroso, Alberto, Correa, Elena, París, Federico
Format: Conference Proceeding
Language:English
Subjects:
Cycles
Damage
Fatigue failure
Fatigue tests
Laminates
Layers
Sanding
Stiffness
Stress ratio
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Summary:After the experimental testing of two different cross-ply laminates under T-T cycling loading (stress ratio R=0.1), their damage scenarios have been analysed in order to compare their subsequent flexural performance. A [04/903/04] laminate made of conventional thickness plies (150gsm) and a [04/90/04] laminate with an ultrathin 90° ply (30gsm) have been manufactured and the obtained coupons have been sanded/polished to examine their fatigue damage scenario microscopically subsequent to the cyclic testing has been performed. After the fatigue cycling, different damage scenarios have been produced, obtaining delamination damages in each case. As this damage mechanism for conventional plies involves a significant reduction of flexural stiffness, a static 4-point bending have been carried out to assess the flexural behaviour of each case study. A comparison between the different fatigue damage scenarios and their flexural performance have been carried out, considering the relevance of the different damage mechanisms for each cross-ply laminate when ultra-thin plies are involved.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0145041