Effect of thermal gradient and reinforcement gradient on the steady state creep in the functionally graded cylinder

Abstract

The present work investigates the steady state creep in an FGM cylinder with varying thermal gradient .The creep behaviour of the FGM cylinder is described by the threshold stress based creep law. In this work the reinforcement is distributed non- linearly in the FGM cylinder and its effect on the stresses and strain rates is investigated. Firstly the influence of reinforcement particle content on strain rates is investigated at constant temperature condition there after investigate is carried out to determine the effect of thermal gradient. The strain rates reduce significantly by increasing the particle content at the inner surface of the FGM cylinder than at the outer surface of the cylinder at constant temperature. There is no larger variation observed in the radial and axial stress but the tangential stress vary significantly due to thermal gradient in the FGM cylinder. The effect of linear and non- linear variation in temperature profile on the strain rates is also investigated. The strain rates decrease throughout the FGM cylinder, when the temperature is minimum at the inner side and maximum at the outer surface of the FGM cylinder. Thus, The FGM cylinder with non – linear temperature profile, maximum particle content and minimum temperature at the inner surface than the outer surface, undergoes the minimum distortion.