Here σ σ , σ σ ¯ ¯ , and t are column vectors with 6, 6, and 3 components, respectively. Subscripts serve as indications of constituents, i.e. f for fiber, m for matrix, and i for interface. M and A are respectively called stress amplification factors (SAF) for macro stresses and for temperature increment. The SAF serves as a conversion factor between macro stresses at the ply level and micro stresses at the constituent level. For a micro point in fiber or matrix, M is a 6×6 matrix while A has the dimension of 6×1; for an interfacial point, respective dimensions of M and A are 3×6 and 3×1. The value of each single term in the SAF for a micro material point is determined through FEA of the unit cell model under given macroscopic loading conditions. The definition of SAF is valid not only for constituents having linear elastic behavior and constant coefficients of thermal expansion (CTE), but also for those possessing complex constitutive relations and variable CTEs.