Assessment of Quasi-Static and Fatigue Loaded Notched GRP Laminates Using Digital Image Correlation

Abstract:

This paper presents the results of an experimental study carried out to assess the effects of cumulative damage on the strain response of open-hole (notched) quasi-isotropic [45/0/-45/90]4s E-glass/913 epoxy laminate specimens under quasi-static tension, and constant amplitude tension-tension, compression-compression and tension-compression cyclic loading conditions. In-plane surface strain was measured as a function of applied load and loading cycles for quasi-static and cyclic loading respectively using digital image correlation (DIC) and compared with strain gauge, fibre Bragg grating (FBG) optical sensor and contact extensometer strain measurements. DIC proved successful in monitoring local (near the hole) and global strains, providing critical information on the changes in strain distribution resulting from damage formation and growth incurred.

• Periodical: Applied Mechanics and Materials (Volumes 24-25)
• Pages: 407-412
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.24-25.407
• Online since: June 2010
• Authors: W.R. Broughton, Michael R.L. Gower, Maria J. Lodeiro, Gordon D. Pilkington, Richard M. Shaw
• Keywords: Digital Image Correlation (DIC), Fatigue, Mechanical Property, Strain Measurement

References

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[1] [2] [3] [4] [5] [6] [7] [8] εεεεxx = 0. 97 + 8. 35 x 10 -5.

[4] Maximum Strain εεεεxx (%) Loading Cycles (4) Experimental Linear fit.