A simple analysis method based a transverse shear deformation theory and a sublaminate approach is utilized to analyze a mixed-mode edge delamination specimen. The method firstly analysis provides closed from expressions for interlaminar shear stresses ahead of the crack, the total strain energy release rate, and the strain energy release rate components; following the influence of temperature and moisture to strain energy release rate are studied, at last we get a conclusion about strain energy release rate in composites laminates under hygrothermal environment.
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