Creep deformations and stresses in thick-walled cylindrical vessels of functionally graded materials subjected to internal pressure

Semi-analytical solution of time-dependent electro-thermo-mechanical creep for radially polarized piezoelectric cylinder

“…As can be seen from Fig. 3, radial stresses are constant with respect to time at the interior and exterior surfaces of the cylinder, satisfying the constant Table 1 Mechanical, thermal and electrical properties of PZT_5 [5,11]. Table 2.…”

“…As far as, the rate of change is concerned, this seems to increases to a maximum between 5 and 10 years, and then decreases until it reaches steady state around 30 years of operation. Compared to the work of You et al [11] mentioned earlier who studied steady-state creep of thick-walled FGM cylindrical vessels under internal pressure, in this work, homogeneous radially polarized anisotropic piezoelectric material is investigated without the influence of electric potential. Therefore, by employing the solution of You et al [11] for the case of zero material constant (i.e.…”

“…Compared to the work of You et al [11] mentioned earlier who studied steady-state creep of thick-walled FGM cylindrical vessels under internal pressure, in this work, homogeneous radially polarized anisotropic piezoelectric material is investigated without the influence of electric potential. Therefore, by employing the solution of You et al [11] for the case of zero material constant (i.e. homogeneous material), our results for dimensionless compressive radial stress, could be compared as indicated in Table 4.…”

“…Chen et al [10] analyzed creep deformation of a functionally graded cylinder subjected to internal and external pressure. Steady-state creep deformation and stresses in thick-walled FGM cylindrical vessels subjected to an internal pressure was also presented by You et al [11] who used Prandtl-Reuss equation for strain-rate stress relation and the Norton's law for material uniaxial creep in conjunction with the equilibrium and compatibility equations, and obtained a closed form solution for steady-state creep stresses and the effective creep strain rate.…”

The influence of variations of geometrical parameters on the notching stress intensity factors of cylindrical shells

“…To be noted, this survey attempts to confront also the solutions proposed in literature (Heliot et al, 1997;McGowan and Raymund, 1997;Shin and Cai, 2004;You et al, 2007) devoted to calculation of SIFs of pressurized cylinders with longitudinal cracks. In fact, this paper permits one to consolidate a robust strategy, suitable for designing industrial components by using the Finite Element Methods (FEM) confidently.…”