In the present paper, time dependent creep behavior of hollow circular rotating cylinders made of exponentially graded material (EGM) is investigated. Loading is composed of an internal pressure, a distributed temperature field due to steady state heat conduction with convective boundary condition and a centrifugal body force. All the material properties are assumed to be exponentially graded a...

In this study, the non-linear creep behaviour of a thick-walled cylinder made of stainless steel 316 is investigated using a semi-analytical method. The thick-walled cylinder is under a uniform internal pressure and a non-axisymmetric thermal field as a function of the radial and circumferential coordinates. For the high temperature and stress levels, creep phenomena play a major role in stress...

The subject of this study is the analysis mechanical fields associated with a crack tip under creep conditions, taking into account phenomenon damage accumulation. objective isto perform finite element modeling, using SIMULIA Abaqus software package, uniaxial tension plate central horizontal For numerical simulation creep, Bailey-Norton power law used. help user procedure UMAT (User Material) p...

The Steady state creep behaviour of a functionally graded cylinder made of isotropic composite containing varying distribution of silicon carbide particles has been investigated by a mathematical model. The creep behaviour of the FGM is described by a Norton's Power law. The effect of varying distribution of SiCP particles of creep stresses and creep rates in the FGM cylinder has been anal...

In order to explore the influence of dynamic disturbance on creep behavior rock, damage evolution in rock under are reproduced with model. this model, constitutive law combined and loading condition is implemented based elastic principle Norton-Bailey equation COMSOL Multiphysics. The numerical results show that alters three aspects, i.e., time, space energy. temporal aspect, not only accelerat...

Safety assessment of geological nuclear waste repositories is essential for the permanent disposal spent fuels and high-level radioactive waste. The long-term integrity host rock as well engineered barrier system (e.g., bentonite buffer) surrounding canisters particular importance decay heat from canisters, which will last over thousands years, significantly disturbs thermo-hydromechanical (THM...

Optimal structural design of cylindrical shells under overall bending, torsion, tension and internal pressure in creep conditions is considered. The material is assumed to be governed by the Norton-Odqvist nonlinear steady creep law. Minimal weight of the shell is the design objective, radius and wall thickness are design variables, and the constraint refers to brittle creep rupture as describe...

Abstract This research work focusses on the implementation of a viscoplastic creep model in thermomechanical simulation wire arc additive manufacturing (WAAM) process for Ti-6Al-4 V structures. Due to characteristic layer by within WAAM process, material effects occur, which can be covered implementing simulation. Experimental tests with wide temperature, load and time range were carried out ex...

Abstract The service life of the purging plug is one fundamental factors that determine downtime and usage efficiency whole ladle. creep behaviour was thus investigated to identify possible failure mechanism. At first, parameters Norton–Bailey strain hardening rule were inversely identified via results test. Then, thermal-solid coupling model approach employed predict plug, in which applied. nu...