Multiple fatigue crack growth behavior has been studied in model transparent GFRP laminates. Detailed experimental observations have been made on the growth of individual fatigue cracks and on the evolution of cracks in off-axis layers in and laminates. Three stages of fatigue crack growth in the laminates have been identified: initiation, steady-state crack growth (SSCG), crack interaction and saturation. The results show that SSCG rate is essentially constant under constant load, independent of crack length and crack spacing. Finite element models have been developed and used to calculate the strain energy release rates associated with the off-axis matrix cracking. A correlation has been achieved between fatigue crack growth rates in off-axis layers and the total strain energy release rates.
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January 2001
Technical Papers
Three Stages of Fatigue Crack Growth in GFRP Composite Laminates
Jie Tong
Jie Tong
Department of Mechanical and Manufacturing Engineering, University of Portsmouth, Anglesea Road, Portsmouth PO1 3DJ, United Kingdom
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Jie Tong
Department of Mechanical and Manufacturing Engineering, University of Portsmouth, Anglesea Road, Portsmouth PO1 3DJ, United Kingdom
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division October 11, 1999; revised manuscript received February 13, 2000. Associate Technical Editor: S. Mall.
J. Eng. Mater. Technol. Jan 2001, 123(1): 139-143 (5 pages)
Published Online: February 13, 2000
Article history
Received:
October 11, 1999
Revised:
February 13, 2000
Citation
Tong, J. (February 13, 2000). "Three Stages of Fatigue Crack Growth in GFRP Composite Laminates ." ASME. J. Eng. Mater. Technol. January 2001; 123(1): 139–143. https://doi.org/10.1115/1.1286234
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