Extensive slow-crack-growth (SCG) analysis was made using a primary exponential crack-velocity formulation under three widely used load configurations: constant stress rate, constant stress, and cyclic stress. Although the use of the exponential formulation in determining SCG parameters of a material requires somewhat inconvenient numerical procedures, the resulting solutions presented gave almost the same degree of simplicity in both data analysis and experiments as did the power-law formulation. However, the fact that the inert strength of a material should be known in advance to determine the corresponding SCG parameters was a major drawback of the exponential formulation as compared with the power-law formulation.Choi, Sung R. and Nemeth, Noel N. and Gyekenyesi, John P.Glenn Research CenterCRACK PROPAGATION; BRITTLE MATERIALS; GLASS; MECHANICAL PROPERTIES; CERAMICS; LIFE (DURABILITY); CONSTANTS; LOADS (FORCES); REACTION KINETICS...