Micromechanical Modeling of Fiber-Matrix Debonding in Unidirectional Composites
Due to variations in damage mechanisms in the microscale, the behavior of fiber-reinforced composites is nonlinear and difficult to model. To make use of computational advantages, homogenization method is applied to the micro-scale model in order to minimize the cost at the expense of detail of local microscale phenomena. In this paper, the effective stiffness is calculated using the homogenization of nonlinear behavior of a composite representative volume element (RVE) containing fiber-matrix debonding. The damage modes for the RVE are considered by using cohesive elements and contacts for the cohesive behavior of the interface between fiber and matrix. To predict more realistic responses of composite materials, different random distributions of fibers are proposed besides square and hexagonal arrays. It was shown that in some cases, there is quite different damage behavior in different fiber distributions. A comprehensive comparison has been made between different graphs.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1474845Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 391
 Xu, Hongyi, et al. Descriptor-based methodology for statistical characterization and 3D reconstruction of microstructural materials. Computational Materials Science, 2014, 85: 206-216.
 Mishnaevsky JR, Leon; Brøndsted, Povl. Micromechanisms of damage in unidirectional fiber reinforced composites: 3D computational analysis. Composites Science and Technology, 2009, 69.7-8: 1036-1044.
 Li, S., et al. Use of mode-I cohesive-zone models to describe the fracture of an adhesively-bonded polymer-matrix composite. Composites Science and Technology, 2005, 65.2: 281-293.
 Valoroso, Nunziante, et al. Identification of mode-I cohesive parameters for bonded interfaces based on DCB test. Engineering Fracture Mechanics, 2013, 104: 56-79.
 Melro, A. R., et al. Micromechanical analysis of polymer composites reinforced by unidirectional fibres: Part I–Constitutive modelling. International Journal of Solids and Structures, 2013, 50.11-12: 1897-1905.
 Melro, A. R., et al. Micromechanical analysis of polymer composites reinforced by unidirectional fibres: Part II–micromechanical analyses. International Journal of Solids and Structures, 2013, 50.11-12: 1906-1915.
 Segurado, Javier; Llorca, Javier. A computational micromechanics study of the effect of interface decohesion on the mechanical behavior of composites. Acta materialia, 2005, 53.18: 4931-4942.
 Totry, Essam, et al. Effect of fiber, matrix and interface properties on the in-plane shear deformation of carbon-fiber reinforced composites. Composites Science and Technology, 2010, 70.6: 970-980.
 O'dwyer, D. J.; O'dowd, N. P.; Mccarthy, C. T. Numerical micromechanical investigation of interfacial strength parameters in a carbon fibre composite material. Journal of Composite Materials, 2014, 48.6: 749-760.
 Swaminathan, Shriram; Pagano, N. J.; Ghosh, Somnath. Analysis of interfacial debonding in three-dimensional composite microstructures. Journal of engineering materials and technology, 2006, 128.1: 96-106.
 Li, Shanhu; Ghosh, Somnath. Debonding in composite microstructures with morphological variations. International Journal of computational methods, 2004, 1.01: 121-149.
 Chandra, N., et al. Some issues in the application of cohesive zone models for metal–ceramic interfaces. International Journal of Solids and Structures, 2002, 39.10: 2827-2855.
 ABAQUS, Inc. ABAQUS theory and standard user's manual. 2003.
 Xia, Zihui; Zhang, Yunfa; Ellyin, Fernand. A unified periodical boundary conditions for representative volume elements of composites and applications. International Journal of Solids and Structures, 2003, 40.8: 1907-1921.
 Nguyen, V.-D., et al. Imposing periodic boundary condition on arbitrary meshes by polynomial interpolation. Computational Materials Science, 2012, 55: 390-406.
 Barbero, Ever J. Finite element analysis of composite materials using AbaqusTM. CRC press, 2013.
 Legarth, Brian Nyvang; Yang, Qingda. Micromechanical analyses of debonding and matrix cracking in dual-phase materials. Journal of Applied Mechanics, 2016, 83.5: 051006.