The driving forces for a generally oriented crack embedded in a Functionally Graded strip sandwiched between two half planes are analyzed using singular integral equations with Cauchy kernels, and integrated using Lobatto-Chebyshev collocation. Mixed-mode Stress Intensity Factors (SIF) and Strain Energy Release Rates (SERR) are calculated. The Stress Intensity Factors are compared for accuracy with previously published results. Parametric studies are conducted for various nonhomogeneity ratios, crack lengths. crack orientation and thickness of the strip. It is shown that the SERR is more complete and should be used for crack propagation analysis.Shbeeb, N. and Binienda, W. K. and Kreider, K.Glenn Research CenterCRACK PROPAGATION; MATHEMATICAL MODELS; MECHANICAL PROPERTIES; FUNCTIONALLY GRADIENT MATERIALS; STRESS INTENSITY FACTORS; STRAIN ENERGY RELEASE RATE; STRUCTURAL ANALYSIS; HALF PLANES; INHOMOGENEITY; SINGULAR INTEGRAL EQUATIONS; CAUCHY PROBLEM; CHEBYSHEV APPROXIMATION; THICKNESS...