creep phenomenon in rock engineering plays a key role in development of underground spaces as they must be stable enough for a long period of time. current research involved designing and manufacturing of a new creep testing machine. the equipment is capable to perform simultaneous light-duty creep tests on more than one cylindrical rock samples at a very low cost.to evaluate the equipment’s pe...

mechanism and factors influencing on creep behavior of clay soil have not been understood yet due to its complex structure. in this paper, to investigate the affecting parameters on the creep behavior of the clay soils such as stress level, over consolidated pressure and water pressure, odeometr test are performed in states of single stage, stepwise and overloaded-unloaded and the creep mechani...

Recently, in-situ TEM straining experiments on pure copper have unraveled a high stress irradiation creep mechanism. Irradiation induced unpinning of dislocations from defects has been observed and the mean pinning lifetime determined. In present study, molecular dynamics simulations are performed to investigate impact collision cascades screw pinned Frank loops under high-applied stresses at 3...

Transient creep may play an important role in short-term (small strain) time-dependent deformation such as the post-glacial rebound and post-seismic deformation. Among various mechanisms of transient creep, I focus on inter-granular dislocation caused by plastic anisotropy each grain. The essence this process is evolution strain accommodation across grain-boundaries from elastic to (viscous) ac...

materials exhibit significant creep behavior at temperatures above 40% of their absolute melt temperature. lead, tin and their alloys are such materials which experience significant creep behavior in room temperature. one of the most important applications of the tin-lead alloys is soldering electronic circuits in electronic industry, and for lead are isolation walls and wet batteries. room tem...

It is now a well known phenomenon that thin films are susceptible to size effects, which can be captured adequately by gradient plasticity theories. Besides the scale dependency, metal thin films also exhibit time dependent behavior: anelasticity (deformation recovery over time following elastic spring back upon load removal) and creep (permanent deformation developed over time at constant load...

Solder materials are critical packaging compounds and due to usually weakest melting temperature among packaging constitutive materials, thus, they are frequently subjected to a multitude of physical phenomena: creep, fatigue and combined hardening effects. The complexity and interaction of such factors must be considered in suitable way in the mechanical behavior modeling using the appropriate...

The classic Cantor (FeCoCrMnNi) isoatomic high entropy alloy was modified by separate additions of Mo and Nb in an effort to optimize its mechanical properties sliding wear response. It found that the introduction single phase FCC solid solution structure original led formation new phases such as BCC solution, ?-phase, Laves, along with possible existence intermetallic phases. overall sequence ...

Primary creep regeneration (PCR) is a phenomenon observed during stress-varying/cyclic loading conditions where load reversal might clear the previous strain hardening memory and cause of primary regime (i.e. period high rate) upon reloading. In this study, in-situ ex-situ microstructural examinations, including transmission electron microscopy (TEM), backscatter diffraction (EBSD), neutron syn...

The emergence of renewable energy sources with their variable and unpredictable nature, in addition to the variation need for weekdays vs. weekends, demands an ever flexible operation thermal power plants. Such a feature has therefore altered typical steady creep loading high-temperature components plants stress-varying or cyclic conditions. introduced load transients have been found affect str...