The superheater and re-heater piping components in supercritical thermal power units are prone to creep fatigue failure fracture after extensive use due the high pressure temperature environment. Therefore, safety assessment for superheaters re-heaters such an environment is critical. However, actual service operation data frequently insufficient, resulting low accuracy of assessment. Based on ...

Abstract In the field of power engineering, where materials are subjected to high pressures at elevated temperatures for many decades, creep-resistant steels put work. Their service life is still, however, finite, as changes in their microstructure can merely be mitigated and not avoided. Creep cavitation one those and, cases, ultimately causes failure by rupture. this work, a model proposed si...

In this article, the problem of time-dependent stress redistribution of a piezomagnetic rotating thick-walled cylinder under an axisymmetric hygro-thermo-magneto-electro-mechanical loading is analyzed analytically for the condition of plane strain. Using the constitutive equations, a differential equation is found in which there are creep strains. Primarily, eliminating creep strains, an analyt...

The creep rupture life and rupture strength of austenitic stainless steels have been expressed as functions of chemical composition, test conditions, stabilisation ratio, and solution treatment temperature . The method involved a neural network analysis of a vast and general database assembled from published data. The outputs of the model have been assessed against known metallurgical trends an...

Micro Gas Turbines (MGTs) are nowadays largely used for electrical and thermal energy production in small buildings households. Their reliability compactness allow them to operate thousands of hours with minimal maintenance. However, the long exposure at high temperatures combustion chambers can promote creep, which induce fatigue potential failure these components. Creep-induced damage MGTs ha...

Stress rupture (sometimes called creep-rupture) is a time-dependent failure mode occurring in unidirectional fiber composites under high tensile loads sustained over long times (e. g., many years), resulting highly variable lifetimes and where has catastrophic consequences. Stress-rupture of particular concern such structures as composite overwrapped pressure vessels (COPVs), tension members in...

The Non-Linear Strain Energy Equivalence Theory, a semi-empirical model, is utilized to predict longterm creep from short-term compressive stress-strain experiments conducted at different strain rates. Stress-strain experiments in uni-axial compression are performed at strain rates of 3 and 0.03 %/minute to predict creep behavior and stress-strain data at several strain rates for an immiscible ...

The September 2022 Ms 6.8 Luding earthquake broke more than 230 years of seismic calm on the Moxi fault, providing a unique opportunity to understand its seismogenic environment, rupture dynamics, and hazard. Using teleseismic body waves, regional strong-motion observations, GNSS, InSAR data, we decipher spatiotemporal evolution mainshock. Combining elastic dislocation model with surface creep,...

Two novel mathematical models based on polynomial function (PF) and boundary condition method (BCM) are presented for determination of shear stress in interface in steady state creep in short fiber composites under axial loading. Important novelty of this research is determination of shear stress in interface without using of shear lag and imaginary fiber technique (IFT) theories. In these appr...

Accurate predictions of the amount and the rate of long- term deformation of reinforced soils under an applied load are important key issue in geotechnical engineering, in which the deformation of soil develops with time at a state of constant effective stress. Since geosynthetic is generally considered creep sensitive therefore, evaluation of creep behavior of geosynthetic reinforced soil (GRS...