Comparative Study of Nonlinear Cumulative Creep Damage Model and Time Fraction Rule to Predict......

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IJERTV10IS040143
Comparative Study of Nonlinear Cumulative Creep Damage Model and Time Fraction Rule to Predict Residual Creep Life of Pressure Vessels

Hemant V Ghule , Dr. Mahendra P. Nimkar

Prediction of creep damage and remaining life of an product is a complex task. There are many types of creep material models and they provide significantly different predictions. Furthermore, the necessary material data required for the material models are rarely available. Creep tests are typically performed in uniaxial tension under constant load and temperature. However, such similar conditions are rarely encountered in practical engineering applications where multiaxial stresses and cyclic load and temperature often are present. Creep-fatigue interaction and correlation between uniaxial and multiaxial stress states also add on to the complexity of the damage assessment in creep conditions.
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