Time-dependent thermoelastic creep analysis of rotating disk made of Al–SiC composite

Abstract

Time-dependent creep stress redistribution analysis of rotating disk made of Al-SiC composite is investigated using Mendelson's method of successive elastic solution. All mechanical and thermal properties except Poisson's ratio are radial dependent based on volume fraction percent of SiC reinforcement. The material creep behavior is described by Sherby's constitutive model using Pandey's experimental results on Al-SiC composite. Loading is an inertia body force due to rotation and a distributed temperature field due to steady-state heat conduction from inner to outer surface of the disk. Using equations of equilibrium, stress strain, and strain displacement, a differential equation, containing creep strains, for displacement is obtained. History of stresses and deformations are calculated using method of successive elastic solution. It is concluded that the uniform distribution of SiC reinforcement does not considerably influence on stresses. However, the minimum and most uniform distribution of circumferential and effective thermoelastic stresses belongs to composite disk of aluminum with 0% SiC at inner surface and 40% SiC at outer surface. It has also been found that the stresses, displacement, and creep strains are changing with time at a decreasing rate so that after almost 50 years the solution approaches the steady-state condition.

Numerical creep analysis of FGM rotating disc with GDQ method

“…Therefore, similarly to the work done by Loghman et al (2011), the disc parameter such as density, Poisson's ratio, thermal expansion coefficient and elasticity modulus can be calculated using a linear mixture rule which is presented by Eq. (4.4).…”

“…Before providing the results of the FGM rotating disc, to validate the analysis and the developed computer code, the results of tangential strain rate have been computed for a disc which was used by Loghman et al (2011) and Ghorbani (2012). A comparison between the results is shown in Fig.…”

“…In other words, increasing the reinforcements leads to creep strength rising. For this reason and because of more other great benefits of FGM materials, these materials have attracted the interest of many researchers (Loghman et al, 2011;Ghorbani, 2012). In recent years, creep analysis in rotating discs made of functionally graded materials has been addressed by many researchers.…”

Thermoelastic analysis for rotating circular HSLA steel plates with variable thickness

“…Utilizing the finite element method, Reddy and Huang [10] presented the large deflection bending of annular plates with variable thickness. Applying the Mendelson's method of successive elastic solution, Loghman et al [11] investigated the time-dependent creep stress redistribution analysis of rotating disk made of Al-SiC composite. Based on the J2 deformation theory, Hu [12] analyzed large deformation of the axisymmetric rotating disk.…”

Magneto-thermo-mechanical creep behavior of nano-composite rotating cylinder made of polypropylene reinforced by MWCNTs

“…It was found that, with perfect interface contact, the decreasing of the CNT radius would improve the overall stiffness and plastic strength, but with an imperfect interface the size effect was reversed. Time-dependent thermo-elastic creep analysis of a rotating disk made of Al-SiC composite using Mendelson's method of successive elastic solution was presented by Loghman et al (2011). They found that the stresses, displacement, and creep strains were changing with time at a decreasing rate so that after almost 50 years the solution approached the steady-state condition.…”