Research on the creep-thermomechanical fatigue (CTMF) behaviors of austenitic stainless steel for nuclear power plant pipelines is reviewed in present paper. The stress response behavior, main damage mechanisms, including thermomechanical fatigue, creep, oxidation, and dynamic strain aging (DSA), as well effects dwell type, time, temperature-strain phase angle life behavior under CTMF loading c...

The purpose of this study was to evaluate the physiological strain index (PSI) for different age groups during exercise-heat stress (EHS). PSI was applied to three different databases. First, from young and middle-age men (21 +/- 2 and 46 +/- 5 yr, respectively) matched (n = 9 each, P > 0.05) for maximal aerobic power. Subjects were heat acclimated by daily treadmill walking for two 50-min bout...

BACKGROUND The human voice undergoes changes associated with normal physiological aging after the age of approximately 65 years. These voice changes indicate an overall decline in vocal function, which can have diverse vocal and psychosocial impacts for the aging individual. At present, there is limited evidence as to whether vocal exercise can alleviate negative vocal changes arising from phys...

In molecular dynamics simulation, the cross-linked epoxy resin model can well simulate performance of in actual use. We have established a and composite aluminum at level. Based on ReaxFF, reaction simulation pyrolysis aging was carried out by Lammps. The aged is decomposed into H 2 , CO, O, CO CH 4 O. Tensile system out, stress-strain curve obtained. Compared with non-aging, maximum stress red...

This paper presents the results of studies on true fracture stresses Al alloy 6101 with an ultrafine-grained (UFG) structure processed by equal channel angular pressing — conform (ECAP-C) method and same after artificial aging (AA state). The grain size in UFG state was about 500 nm. Aging particles Al3Fe were present AA state. Strength yield stress increase as a result formation structure. str...

Structural characteristics influence assessment of fatigue cracking behavior. In the asphalt pavements, structure and practical conditions must be considered. This study analyzes changes in elastic modulus pavement different mixtures amid aging moisture damage through tests. A model to predict tensile strain at bottom layer is developed a structural analysis based on material properties. The re...