Effects of thermal stress and imperfect interfacial bonding on the mechanical behavior of composites subjected to off-axis loading

Abstract Metal matrix composites exhibit inelastic response due to the viscoplasticity of matrix, and imperfect interfacial bonding will decrease the flow stress sharply. The present study develops the generalized model of cells (GMC) to predict mechanical behavior of unidirectional metal matrix composites with imperfect interfacial bonding, which is subjected to off-axis loading. The model incorporates viscoplastic model for the matrix and interfacial debonding model for the fiber/matrix interface. The effects of fiber volume fraction and thermal residual stress on stress–strain response of composites are also discussed. Results show that stress–strain response influenced by fiber cross-section shape becomes more evident with the increase of fiber off-axis angle. Similar stress–strain response can be found in the early stage of loading regardless of the thermal residual stress. However, the effect of thermal residual stress on the stress–strain behavior of composites with imperfect interfacial bonding is closely dependent on fiber off-axis angle in the plastic stage.

[1]  B. Majumdar,et al.  Inelastic deformation of metal matrix composites: Plasticity and damage mechanisms, part 2. Final Report , 1992 .

[2]  S. R. Bodner,et al.  Constitutive Equations for Elastic-Viscoplastic Strain-Hardening Materials , 1975 .

[3]  A. Needleman.  A Continuum Model for Void Nucleation by Inclusion Debonding , 1987 .

[4]  G. Kang,et al.  Effect of interfacial bonding on uniaxial ratchetting of SiCP/6061Al composites: Finite element analysis with 2-D and 3-D unit cells , 2008 .

[5]  Zheng-ming Huang.  Strength formulae of unidirectional composites including thermal residual stresses , 2000 .

[6]  Cliff J. Lissenden,et al.  INTERFACIAL DEBONDING IN LAMINATED TITANIUM MATRIX COMPOSITES , 1996 .

[7]  Jacob Aboudi,et al.  Damage in composites—Modeling of imperfect bonding , 1987 .

[8]  B. Bednarcyk,et al.  Micromechanics-based deformation and failure prediction for longitudinally reinforced titanium composites , 2001 .

[9]  B. Bednarcyk,et al.  Transverse tensile and creep modeling of continuously reinforced titanium composites with local debonding , 2002 .

[10]  S. Das,et al.  FEM modeling of the interface and its effect on the elastio-plastic behavior of metal matrix composites , 2006 .

[11]  Zheng-Ming Huang,et al.  Micromechanical prediction of ultimate strength of transversely isotropic fibrous composites , 2001 .

[12]  Jacob Aboudi,et al.  Response prediction of composites composed of stiffening fibers and non-linear resin matrix , 1993 .

[13]  J. Aboudi.  Micromechanical analysis of the finite elastic–viscoplastic response of multiphase composites , 2003 .

[14]  Cliff J. Lissenden,et al.  Numerical modelling of damage development and viscoplasticity in metal matrix composites , 1995 .

[15]  R. Shenoi,et al.  An analytical model to predict residual thermal stress in 2D orthogonal plain weave fabric composites , 2009 .

[16]  John A. Nairn,et al.  Numerical Implementation of Imperfect Interfaces , 2007 .

[17]  Bijan Mohammadi,et al.  Thermal residual stresses effects on fatigue crack growth of repaired panels bounded with various composite materials , 2009 .

[18]  C. Lissenden.  Fiber–matrix interfacial constitutive relations for metal matrix composites , 1999 .

[19]  B. Bednarcyk,et al.  Local field effects in titanium matrix composites subject to fiber-matrix debonding , 2004 .

[20]  Carlos Roberto Camello Lima,et al.  Evaluation of residual stresses of thermal barrier coatings with HVOF thermally sprayed bond coats using the Modified Layer Removal Method (MLRM) , 2006 .

[21]  R. Luciano,et al.  Micromechanical analysis of interfacial debonding in unidirectional fiber-reinforced composites , 2006 .

[22]  Yan Zhang,et al.  Multiscale finite element modeling of failure process of composite laminates , 2010 .

[23]  M. Paley,et al.  Micromechanical analysis of composites by the generalized cells model , 1992 .

[24]  J. Jones,et al.  Waves at a Flexibly Bonded Interface , 1967 .

[25]  C. Basaran,et al.  A micromechanical model for effective elastic properties of particulate composites with imperfect interfacial bonds , 2005 .

[26]  Jan Drewes Achenbach,et al.  Effect of interfacial zone on mechanical behavior and failure of fiber-reinforced composites , 1989 .