A variable kinematic one-dimensional model for the hygro-mechanical analysis of composite materials. (15th June 2020)

• Record Type: Journal Article
• Authors: Severino, S.; Zappino, E.; Pagani, A.; Gigliotti, M.; Pannier, Y.; Carrera, E.
• Is Part Of: Composite structures. Volume 242(2020)
• Publication Date: 2020-06-15
• Subjects: Composite aging -- Hygro-mechanic analysis -- Carrera Unified Formulation -- Multi-field analysis; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2020.112089
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: An advanced modeling technique for hygro-mechanical analyses has been discussed in the present work. A three-dimensional closed-form solution of the diffusion equation has been developed and used to evaluate the time evolution of the moisture concentration in a composite coupon. A refined kinematic one-dimensional model, derived in the framework of the Carrera unified formulation, has been extended to the hygro-mechanical analysis of composites. The present one-dimensional model has been used to predict the stress evolution in a composite specimen using the moisture concentration, deriving from the analytical solution, as boundary conditions. The results have been compared with those from a solid model derived in by means of the commercial tool Abaqus. The performances of the present approach have been investigated through a convergence analysis. The results demonstrate the numerical efficiency of the present one-dimensional model that can provide a three-dimensional solution with a reduction in the computational cost with respect to the classical solid model.