The aim of this study is to investigate effects of isothermal aging on mechanical properties of fiber metal laminates (FMLs) and glass/epoxy composites. For this purpose, both materials were fabricated using the wet lay-up manufacturing technique under vacuum pressure. Both the glass/epoxy composites and the FML specimens were then subjected to isothermal aging (130°C, dried air) for up to 5 we...

In this article, both numerical and experimental investigations were carried out on the durability of hemp concrete. For this, an accelerated aging process was performed using cycles immersion, freezing drying. Then, campaign enabled to determine heat mass transfer properties, as well microstructure for aged reference materials. Observations a digital microscope showed appearance cracks at inte...

Purpose: The purpose of the current study was to examine the effect of accelerated aging on color stability of the In-Ceram and Cergogold ceramic materials. Materials and Methods: Ceramic samples with 1.0 mm in diameter and 1.5 mm in thickness were prepared in three commonly used shades. CIE Lab readings were recorded with a spectrophotometer prior to experiments and after 100-hour accelerated ...

An adsorption-desorption (or parking-lot) model can reproduce qualitatively the densification kinetics and other features of a weakly vibrated granular material. Here we study the the two-time correlation and response functions of the model and demonstrate that their behavior is consistent with recently observed memory effects in granular materials. Although the densification kinetics and hyste...

use of plant growth promoting bacteria (pgpb) and high quality of seed as agricultural inputs play important roles in sustainable crop production. to study the effects of different levels of seed aging and pgpb's application on field emergence, seedling establishment and yield of two red kidney bean cultivars in field conditions, an experiment was carried out as factorial based in a rcbd d...

normal 0 false false false en-us x-none ar-sa background: aging induces physiological changes and affects all of organs. nutritional status and mental health deteriorate with aging. as malnutrition and depression are main problem in elderly this study was performed to assess the association between malnutrition and depression among rural elderly. materials and methods: three hundred and seventy...

– The configurational de-correlation in an aging system is attributed to irreversible intermittent rearrangements, which are described as a Poisson process with average ∝ ln(1 + t/tw), where t is the observation time and tw is the age [P. Sibani and H.J. Jensen, Europhys. Lett. 69, 2005]. On this basis, we obtain a simple model for the off-equilibrium aging behavior of the autocorrelation: the ...

Ferromagnetic materials are widely used in industry and risking the hazards of aging degradation their mechanical properties. This paper proposed a non-destructive method for measurement yield strength ferromagnetic imprinted by materials’ microstructure as influences pattern inverse magnetostrictive effect materials. For experimental verification, strengths specimens were measured on an electr...

– The relation between the autocorrelation C(t, tw) and the integrated linear response function χ(t, tw) is studied in the context of the large-N model for phase-ordering systems subjected to a shear flow. In the high temperature phase T > Tc a non-equilibrium stationary state is entered which is characterized by a non-trivial fluctuation-dissipation relation χ(t − tw) = ˜ χ(C(t − tw)). For que...