CREEP ANALYSIS OF A HOLLOW CYLINDRICAL SHELL

Creep, a time-dependent deformation phenomenon occurring under constant stress and elevated temperatures, is a critical consideration in materials engineering, particularly for applications involving high temperatures such as power generation, aerospace, and structural components. This document provides a comprehensive exploration of creep behavior, focusing on its stages (primary, secondary, and tertiary), underlying mechanisms, and mathematical modeling. Key creep models, including Norton’s Power Law and the Dorn Equation, are discussed, emphasizing the role of material constants (C₁, C₂, C₃, C₄) in predicting creep strain rates and deformation. A detailed case study is presented, focusing on the creep analysis of a hollow structural steel cylinder with fixed inner and outer diameters but varying length ratios, subjected to internal pressure and high temperatures. Using ANSYS Workbench, the study employs Norton’s Power Law to model creep deformation, calculating radial displacement, axial elongation, and creep strain over time. The methodology includes geometry creation, material property definition, loading conditions, and boundary constraints, providing a practical framework for evaluating creep in engineering applications. The experiment investigates how different length-to-diameter ratios influence creep behavior, offering insights into the design and optimization of cylindrical structures under sustained stress.