Residual stresses and their effects on deformation

Residual stresses induced by thermal expansion mismatch in metal-matrix composites are studied by three-dimensional (3-D) elastic-plastic finite element analyses. Typically, the stress-free state is 150 to 300 K above room temperature. The coefficient of thermal expansion of the matrix is 3 to 5 times larger than that of the ceramic inclusion, resulting in compressive stresses of order 200 MPa in the inclusions. Both compressive and tensile stresses can be found in the matrix. Since the stress may exceed the matrix yield strength near the particles, plastic flow occurs. The authors find a significant influence of this flow on the elastic and plastic properties of the composite. The calculated residual strains in TiC particles due to thermal expansion mismatch and external loads compare well with recent neutron diffraction experiments (Bourkeet al.) The present work is the first reported three-dimensional analysis of spherical inclusions in different arrays (simple cubic (sc) and face-centered cubic (fcc)) that permit a study of particle interactions.

[1]  Z. Hashin.  Analysis of Composite Materials—A Survey , 1983 .

[2]  M. Taya,et al.  Thermal residual stress in metal matrix composite , 1987 .

[3]  H. Ledbetter,et al.  Internal strain (stress) in an SiCAl particle-reinforced composite: an X-ray diffraction study , 1987 .

[4]  Robert M. McMeeking,et al.  The influence of residual stress on the yielding of metal matrix composites , 1991 .

[5]  S. Majumdar,et al.  Application of neutron diffraction to measure residual strains in various engineering composite materials , 1991 .

[6]  J. Allison,et al.  Fatigue behavior of a 2XXX series aluminum alloy reinforced with 15 vol Pct SiCp , 1991 .

[7]  Subra Suresh,et al.  An analysis of the effects of matrix void growth on deformation and ductility in metal-ceramic composites , 1991 .

[8]  L. C. Davis.  Third-order bounds on the elastic moduli of metal-matrix composites , 1991 .

[9]  R. Arsenault,et al.  The Effect of Thermal Residual Stresses on the Asymmetric Constitutive Behavior of Metal-Matrix Composites , 1991 .

[10]  J. Allison,et al.  Effect of Microstructure on the Cyclic Response and Fatigue Behavior of an XDTM Aluminum Metal Matrix Composite , 1991 .

[11]  R. McMeeking,et al.  Plastic flow in ductile materials containing a cubic array of rigid spheres , 1991 .

[12]  John W. Hutchinson,et al.  Particle reinforcement of ductile matrices against plastic flow and creep , 1991 .

[13]  S. Nutt,et al.  Thermally and mechanically induced residual strains in Al-SiC composites , 1992 .

[14]  Subra Suresh,et al.  An experimental and numerical study of cyclic deformation in metal-matrix composites , 1992 .

[15]  P. Withers,et al.  The analysis of internal strains measured by neutron diffraction in Al/SiC metal matrix composites , 1992 .

[16]  Eun U. Lee.  Thermal stress and strain in a metal matrix , 1992, Metallurgical and Materials Transactions A.

[17]  A. Krawitz,et al.  Deformation-induced residual stress changes in SiC whisker-reinforced 6061 Al composites , 1993 .