Cryogenic delamination growth in woven glass/epoxy composite laminates under mixed-mode I/II fatigue loading |
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Authors: | Yasuhide Shindo Masaya MiuraTomo Takeda Nozomi SaitoFumio Narita |
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Affiliation: | Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai 980-8579, Japan |
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Abstract: | This paper investigates the fatigue delamination growth behavior in woven glass fiber reinforced polymer (GFRP) composite laminates under mixed-mode I/II conditions at cryogenic temperatures. Fatigue delamination tests were performed with the mixed-mode bending (MMB) test apparatus at room temperature, liquid nitrogen temperature (77 K) and liquid helium temperature (4 K), in order to obtain the delamination growth rate as a function of the range of the energy release rate, and the dependence of the delamination growth behavior on the temperature and the mixed-mode ratio of mode I and mode II was examined. The energy release rate was evaluated using three-dimensional finite element analysis. The fractographic examinations by scanning electron microscopy (SEM) were also carried out to assess the mixed-mode fatigue delamination growth mechanisms in the woven GFRP laminates at cryogenic temperatures. |
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Keywords: | A Polymer-matrix composites (PMCs) B Delamination B Fatigue C Finite element analysis (FEA) D Fractography |
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