نتایج جستجو برای: hardening
تعداد نتایج: 10525 فیلتر نتایج به سال:
We present here an extension of the viscoplastic self-consistent (VPSC) polycrystal model for the calculation of the intergranular Cauchy stresses in an aggregate. This method, which is based on the self-consistent treatment of incompressible aggregates proposed in 1987 by Molinari et al, is formulated using the inclusion formalism and full anisotropy is incorporated into it. The complete stres...
INTRODUCTION Today's rapidly changing global political climate is significantly impacting the military strategies of Free World coun-triess Important decisions are being made regarding each country's defense and military equipment needss Regardless of these ongoing political changess howeverr the threat of nuclear weaponry use remains a viable possibilityy As long as a first-strike capability e...
The influence of harvesting date on some physicochemical properties of nectarine (Prunus persica var. Red gold) fruit including fruit weight, pigment content, total carbohydrate, total phenol and antioxidant activity were studied. Fruits were harvested in four different stages; a) two weeks after fruit set, b) pit hardening, c) three weeks after pit hardening and 6 weeks after pit hardening. Re...
Ensuring the radiation hardness of PbWO4 crystals was one of the main priorities during the construction of the electromagnetic calorimeter of the CMS experiment at CERN. The production on an industrial scale of radiation hard crystals and their certification over a period of several years represented a difficult challenge both for CMS and for the crystal suppliers. The present article reviews ...
Today’s rapidly changing global political climate is significantly impacting the military strategies of Free World countries. Important decisions are being made regarding each country’s defense and military equipment needs. Regardless of these ongoing political changes, however, the threat of nuclear weaponry use remains a viable possibility. As long as a first-strike capability exists, radiati...
Since the objective structured clinical examination (OSCE) was first described by Harden and Gleeson1 in 1979, it has become a valuable tool that is increasingly used in the assessment of clinical skills at health sciences faculties. Its popularity can be attributed partly to the fact that the OSCE is one of the few available options for the assessment of “shows how” (performance) as categorise...
Springback is one of the most common and important issues in metal forming area. Due to the fact that springback depends on a variety of parameters, it is hard to predict. Hence, in this paper, the effect of continuum damage mechanics (CDM) on springback was investigated based on the Lemaitre isotropic unified damage law. Swift’s hardening law was employed to describe isotropic hardening behavi...
In the present article, a new method for the determination of the hardening law using the load displacement curve, F–h, of a spherical indentation test is developed. This method is based on the study of the error between an experimental indentation curve and a number of finite elements simulation curves. For the smaller values of these errors, the error distribution shape is a valley, which is ...
The mechanisms of dislocation intersection and strain hardening in fcc crystals are examined with emphasis on the process of junction formation and destruction. Large-scale 3D simulations of dislocation dynamics were performed yielding access for the first time to statistically averaged quantities. These simulations provide a parameter-free estimate of the dislocation microstructure strength an...
Recent measurements of cosmic rays by various experiments have found that the energy spectrum of cosmic rays is harder in the TeV region than at GeV energies. The origin of the spectral hardening is not clearly understood. In this paper, we discuss the possibility that the spectral hardening might be due to the effect of re-acceleration of cosmic rays by weak shocks associated with old supernov...
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