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Damage characterization and fatigue modeling of CFRP subjected to cyclic loading
Published in Elsevier Ltd
2018
Volume: 202
   
Pages: 1069 - 1077
Abstract
Fatigue damage evolution in CFRP is characterized by variation of local transverse strain from digital image correlation (un-notched) and temperature variation from infrared thermography (notched). The damage evolves over 2–3 stages. Matrix cracks and fiber matrix debonding are observed in ±45° 90° and 0° plies in stage I. Fiber fracture is observed in 0° plies only in stage II of the un-notched specimen. It is present even in stage I for notched specimens. In notched specimens, extensive fiber fracture is observed in −45° 90° and 0° plies in stage II due to higher local stresses. Fiber fracture causes a larger rate of increase in local temperature. A three parameter cumulative damage model is used for predicting the damage evolution and fatigue life. Predictions were good for tension–compression tests in unnotched specimens, but inadequate for compression-compression tests. While using temperature for damage characterization in notched specimens, additional parametrization is required. © 2018 Elsevier Ltd
About the journal
JournalData powered by TypesetComposite Structures
PublisherData powered by TypesetElsevier Ltd
ISSN02638223
Open AccessNo
Concepts (14)
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    Carbon fiber reinforced plastics
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    Compression testing
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    Fiber reinforced plastics
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    Fibers
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    Fracture
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    CUMULATIVE DAMAGE MODELS
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    DAMAGE CHARACTERIZATION
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    DIGITAL IMAGE CORRELATIONS
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    Fatigue model
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    Fiber-matrix debonding
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    NOTCHED SPECIMENS
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    Temperature variation
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    TRANSVERSE STRAIN
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    Fatigue damage