Article
Secondary creep analysis of FG rotating cylinder with exponential, linear and quadratic volume reinforcement
Registro en:
Sahni, M., Mehta, P. D., Sahni, R., León-Castro, E., & Espinoza-Audelo, L. F. (2022). Secondary creep analysis of FG rotating cylinder with exponential, linear and quadratic volume reinforcement. Materials, 15(5) doi:10.3390/ma15051803
1996-1944
Autor
Sahni, Manoj
Dinesh Mehta, Parth
Sahni, Ritu
León Castro, Ernesto
Espinoza Audelo, Luis
Resumen
Artículo de publicación SCOPUS - WOS 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 and strains. The
response of the FG cylinder with isotropic material is analyzed and the solution for stress–strain
rates in radial and tangential directions are obtained in closed form. Comparison of steady state
creep stresses and strains under exponential, linear and quadratic volume reinforcement profiles are
discussed and presented graphically.