Secondary Creep Analysis of FG Rotating Cylinder with Exponential, Linear and Quadratic Volume Reinforcement

• Published in: Materials 2022-02, Vol.15 (5), p.1803
• Main Authors: Sahni, Manoj, Mehta, Parth Dinesh, Sahni, Ritu, León-Castro, Ernesto, Espinoza-Audelo, Luis F
• Format: Article
• Language: English
• Subjects: Aerospace engineering; Aluminum; Boiler tubes; Boilers; Centrifugal force; Component reliability; Composite materials; Creep analysis; Creep rate; Creep strength; Cylinder liners; Deformation effects; Energy industry; Engineers; External pressure; Functionally gradient materials; Headers; High temperature; Isotropic material; Jet engines; Nuclear accidents & safety; Nuclear power plants; Nuclear reactors; Pressure vessels; Reinforcement; Reliability engineering; Rotating bodies; Rotating cylinders; Service life; Strain hardening; Stress concentration; Stresses; Time dependence; Working conditions
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma15051803

Creep is an irreversible time-dependent deformation in which a material under constant mechanical stress and elevated temperature for a considerably prolonged period of time, starts to undergo permanent deformation. Creep deformation occurs in three stages namely, primary, secondary and tertiary. Out of these three stages, secondary or steady state creep is particularly an area of engineering interest as it has almost a constant creep rate. Creep deformation plays a significant role in understanding effective service life of an engineering component working under high temperature conditions as such components such as super-heater and re-heater tubes and headers in a boiler, jet engines operating at temperature as high as 1200 ∘C, usually experience a failure or rupture due to creep phenomenon. Design engineers keep a close attention on working stress conditions and elevated temperature under which an engineering component is expected to work as these conditions determine the onset of creep behavior in an engineering component. By recognizing the parameters of material response to creep behavior, engineers can analyse the useful service life and hazardous working conditions for an engineering components. Recognizing the creep phenomenon as high temperature design limitation, ASME Boiler and Pressure Vessel Code have provided guidelines on maximum allowable stresses for materials to be used in creep range. One of the criteria for determination of allowable stresses is 1% creep deformation of material in 100,000 h of service. Thus, the study of creep behavior in engineering components pertaining to high stress and temperature working conditions is very important as it affects the reliability and performance of the engineering components. The aim of our study is to understand the behavior of secondary creep deformation so that an advanced reinforced functionally graded material with better creep resistance, can be designed. In this paper, a secondary creep analysis of functionally graded (FG) thick-walled rotating cylinder under internal and external pressure is conducted. The novelty of the model intends to specify secondary creep stresses and strains by employing exponential, linear and quadratic volume reinforcement for SiCp ceramic in Al metal matrix in radial direction. This will help us to understand the effect of volume reinforcement in FG cylinder under internal/external pressure and rotating centrifugal body force by obtaining secondary creep stresses