The impression creep test method has been used extensively to determine the in-service properties of power plant components from a small volume material. In standardisation test, determination maximum ‘allowable’ indentation depth is an important issue. This paper presents results finite element analyses obtained using simplified based on steady-state creep, for evaluating variation conversion ...

In this letter, we develop a framework to study the mechanical response of athermal amorphous solids via coupling mesoscale and microscopic models. Using measurements coarse grained quantities from simulations dense disordered particulate systems, present coherent elasto-plastic model approach for deformation flow yield stress materials. For given set parameters, allows match consistently trans...

The stress analysis of pressurized circumferential pipe weldments under steady state creep is considered. The creep response of the material is governed by Norton’s law. Numerical and analytical solutions are obtained by means of perturbation method, the unperturbed solution corresponds to the stress field in a homogeneous pipe. The correction terms are treated as stresses defined with the help...

Devices in modern technologies often have complex architectures, dissimilar materials, and small features. Their long-term reliability relates to inelastic, time-dependent mechanical behavior of such structures. This paper analyzes a three-layer structure consisting of, from top to bottom, an elastic film, a power-law creep underlayer, and a rigid substrate. The layers are bonded. Initially, th...

Time-dependent creep analysis is presented for the calculation of stresses and displacements of axisymmetric thick-walled cylindrical pressure vessels made of functionally graded material (FGM). For the purpose of time-dependent stress analysis in an FGM pressure vessel, material creep behavior and the solutions of the stresses at a time equal to zero (i.e. the initial stress state) are needed....

We analyze the Rice-Ruina state and rate dependent friction model. The system consists of a block driven by a spring with constant velocity on a dry, rough surface. Our discussion is limited to the creep-like motion, when the driving velocity is small. Two regimes of motion are observed: stick-slip and steady sliding. The stability of the steady sliding depends on the model parameters. Numerica...

Creep aging behavior of a pre-strain and under-age treated 7B04 aluminum alloy (7B04-P for short) was systematically investigated under different temperatures applied stresses. A lot dislocation tangles η’/GPzs were formed in the Al matrix 7B04-P al alloy. With increase temperature stress, total creep strain steady-state rate increased significantly. However, mechanical properties creep-aged ar...

The benefits of tailored lattice topologies are limited in elevated temperature conditions without a clear understanding about the interplay between metamaterial structure and creep response base material. This study showed that causes compressive behavior to differ largely from bulk structures same Inconel 625 FCCZ lattices solid round bar specimens were crept compression at two temperatures t...