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Creep and damage accumulation in orthotropic composites under cyclic loading

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Experimental results and theoretical prediction of the response of glassfiber-reinforced polyester under quasi-static, static (creep), and cyclic (fatigue) loading are presented. The nonlinear strain component at static loading and the strain amplitude rate at cyclic off-axis loading of an orthotropic composite are shown to follow the associated flow rule with a single-parameter quadratic potential function. The influence of fatigue damage on deformation is considerable due to the reduction in the elastic modulus of the composite and is apparently negligible with respect to its effect on the parameters of the creep kernel.

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Translated from Mekhanika Kompozitnykh Materialov, Vol. 34, No. 4, pp. 447–460, July–August, 1998.

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Tamužs, V., Andersons, J., Aniskevich, K. et al. Creep and damage accumulation in orthotropic composites under cyclic loading. Mech Compos Mater 34, 321–330 (1998). https://doi.org/10.1007/BF02257900

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  • Fatigue
  • Elastic Modulus
  • Static Loading
  • Theoretical Prediction
  • Potential Function