Characterization of Curing Stress Effects on Fracture Behavior of FRP                 Laminated Composites with Embedded Delaminations

Pradhan, B.; Panda, Satyajit

doi:10.1177/0731684406069031

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…Tay and Shen (2002) report values for buckling and post-buckling of laminated composites and present a prediction of their delamination process in presence of residual thermal stresses. The evaluation of the effect of curing stresses on interlaminar delamination crack growth behavior in fiberreinforced polymeric composites was presented by Pradhan and Panda (2006). In this paper, results are developed for elliptical delamination embedded between plies of different orientations in the analyzed laminate.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Residual Stresses on Buckling and Post-Buckling Properties of Laminated Composites Perimetrally Reinforced

Sánchez-Cruz

Carrillo

Almeida

2016

Lat. Am. j. solids struct.

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Several mechanical properties can be affected by the occurrence of residual stresses due to curing, and their effects are more pronounced in laminated composites. The effect of the thermal residual stresses on the buckling and post-buckling properties of perimetrally reinforced laminated composites is experimentally characterized. Carbon/epoxy laminates were prepared using two different techniques. One group of laminates was prepared by co-curing the reinforcement at 177 °C. The second group of laminates was prepared by secondary bonding of the reinforcement to the laminate at room temperature (22°C). Topogrammetry equipment was utilized in order to determine the buckling and post-buckling properties of these two groups of laminates. A numerical model was achieved using commercial software for comparison with the experimental results. Suitable accuracy was observed when comparing experimental and numerical results. The co-cured laminates developed considerably higher critical load for buckling values than those obtained for laminates produced with secondary bonding at room temperature. The experimental and numerical results of this study demonstrate the importance of curing-induced thermal residual stresses on the mechanical behavior of laminate composites.

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Section: Introductionmentioning

confidence: 99%