Thermomechanical transient analysis of a thick-hollow FGM cylinder

Abstract

This paper presents an analytical and a numerical thermomechanical investigation of a thickwalled cylinder made of the functionally graded materials (FGMs). The hollow cylinder is subjected to a pressure and a thermal load and the properties of this material are varying across the thickness from the inner face that is a ceramic to the outer one which is a metal. After validating the current results by the analytical results, the thermomechanical behavior of the cylinder in the transient condition is investigated and the hoop and radial stresses and also temperature distribution are reported. The results reveal that the use of FG material causes a decrease in the stress; thus, it significantly improves thermomechanical behavior of the domain, thanks to using FG materials.

Calculation of Stress Intensity Factor for an Internal Circumferential Crack in a Rotating Functionally Graded Thick-Walled Hollow Circular Cylinder under Thermal Shock

“…Table 1. Mechanical properties in the inner and outer wall [1] Distribution of temperature and radial stress along the thickness of cylinder are compared with results of reference [1] in Fig. 3 and Fig.…”

“…Takabi [1] studied cylinder under mechanical and thermal load as numerical and analytical methods. This thick-walled cylinder was made of functional material with inner wall of the ceramic (SiO 2 ) and the outer wall of the metal (Al).…”

“…The unique features provided of FGMs have induced scientists to study them [1]. These materials are used extensively in applications, such as thermal barrier coatings, in which they are exposed to severe stress gradients including thermal and/or mechanical loading.…”

“…Meshii and Watanabe [3] achieved the closed-form SIFs for limited homogenous 1 cylinder with a circumferential crack. They also examined the effects of the cylinder length and crack position on these factors.…”

Fracture of underwater notched structures

“…For this purpose, some researchers (Nayebi & Ansari, Sadrabadi, 2013;Takabi, 2016) have utilized modern and advanced materials such as FG materials to decrease stresses of structures. However, when it comes to notches, especially in underwater structures, material enhancement could not work out per se, and a meticulous study should also be performed on notched components.…”