We use the simplest micromechanics model of homogenization, namely the dilute solution that neglects the
interaction among particles, to determine the coefficients rint
n and sint
n in terms of [un] and [vn]. The coefficients
[un] and [vn] are then determined via energy minimization in Section 6.
An infinite matrix containing a single spherical particle of radius a is subject to remote uniaxial tension r in
the dilute solution. The normal and shear stress tractions at the particle/matrix interface r = a are given in Eq.
(10) as rint ¼ P1
n¼0rint
n Pnðcos hÞ and sint ¼ P1
n¼2sint
n P0
nðcos hÞ. For the spherical particle subject to the above
normal and shear stress tractions, the displacement field up
r ðr; hÞ and up
h ðr; hÞ in the particle has been obtained
analytically in terms of rint
n and sint
n (Lure´, 1964). The matrix is subject to remote uniaxial tension r, and the
above normal and shear stress tractions on its inner surface r = a (i.e., particle/matrix interface). The displacement
field um
r ðr; hÞ and um
h ðr; hÞ in the matrix has also been obtained analytically in terms of rint
n and sint
n (Lure´,
1964). The displacement jump across the particle/matrix interface requires