Paper Details

Name: Dharmpal Deepak
Country: India

Year: 2015
Volume: Volume-2, Issue-1 (January-June)
Page Number: 54-68

Rotating disks are widely used in high-speed engineering applications such as gas
turbines, turbo generators, compressors, flywheels, automotive braking systems, and
aerospace components, where they are frequently subjected to elevated temperatures
and severe mechanical loading. Under such operating conditions, creep deformation
and thermo-mechanical stresses significantly influence the structural integrity,
reliability, and service life of the rotating components. The present study focuses on
the creep deformation and stress analysis of rotating disks made of composite and
functionally graded materials (FGMs). A comprehensive review of elastic-plastic
stress analysis, steady-state creep behavior, and thermo-mechanical performance of
rotating disks has been carried out by considering various material models,
thickness profiles, and reinforcement distributions. Particular emphasis has been
given to aluminum matrix composites reinforced with silicon carbide particles or
whiskers and their functionally graded counterparts operating under thermal
gradients. The study examines the influence of material anisotropy, reinforcement
content, thermal residual stresses, and grading profiles on stress distribution and
creep strain rates in rotating disks. The findings reveal that functionally graded and
composite rotating disks exhibit superior creep resistance and improved stress
distribution compared to homogeneous disks. The investigation provides valuable
guidelines for the optimal design and development of advanced rotating disks
capable of operating efficiently under high-temperature and high-speed conditions.

Keywords: Rotating disks, creep deformation, thermo-mechanical stress analysis,
functionally graded materials (FGMs)