نتایج جستجو برای: fatigue behavior

تعداد نتایج: 683623  

ژورنال: پژوهش های مشاوره 2014
دستانی, ثمینه, قدیمی, سمیه, قمری, حسین,

The purpose of this study was the effectiveness of Cognitive Behavior Therapy on reducing the rate of depression and rumination in women that suffering from chronic fatigue syndrome. The statistic population in this study consisted of all females who referred to the health and clinical centers in Tabriz city and suffered from Chronic Fatigue Syndrome. 30 female patients were selected and random...

H Mehrabi M Shariati,

In this paper, low cycle fatigue life of CK45 steel and SS316 stainless steel under strain-controlled loading are experimentally investigated. In addition, the impact of mean strain and strain amplitude on the fatigue life and cyclic behavior of the materials are studied. Furthermore, it is attempted to predict fatigue life using energy and SWT damage parameters. The experimental results demons...

Farmanesh, K., Soltanipour, A.R., Soltanipour, A.R. ,

 This paper presents experimental results on the fatigue properties of the modified microstructure of cost Al-alloy 7075 via friction stir processing (FSP). The microstructural behavior was investigated by using optical microscope (OM). The grain size of cast FSP-ed at different locations was investigated via XRD. Uniaxial tensile and bending fatigue tests were carried out at room temperature o...

Farmanesh, K., Soltanipour, A.R., Soltanipour, A.R. ,

 This paper presents experimental results on the fatigue properties of the modified microstructure of cost Al-alloy 7075 via friction stir processing (FSP). The microstructural behavior was investigated by using optical microscope (OM). The grain size of cast FSP-ed at different locations was investigated via XRD. Uniaxial tensile and bending fatigue tests were carried out at room temperature o...

Introduction: As one of the members of the care team, nurses are confronted with a lot of work-associated stress whereby they will experience mental health problem if this stress continues. This study aims at investigating the efficacy of cognitive behavior therapy on quality of life, anxiety and fatigue of cancer section nurse’s at 2017.    Methods: Research method was quasi experimental with...

Journal: :journal of computational and applied research in mechanial engineering - jcarme 0
m. jooybari school of mechanical engineering, college of engineering, university of tehran, tehran, iran j. shahbazi karami faculty of mechanical engineering, shahid rajaee teacher training university, tehran, iran m. sheikhi faculty of mechanical engineering, shahid rajaee teacher training university, tehran, iran

in the present study, mechanical properties and low cycle fatigue behavior of a solid-solutionized aa6061 aluminum alloy produced by equal channel angular pressing (ecap) process were investigated. the grain refinement after two passes of ecap significantly increased the yield stress and ultimate tensile stress and decreased the ductility of the alloy. however, the improvement of low cycle fati...

Since martensitic precipitation hardened 17-4pH stainless steel has been widely used in corrosive environments, evaluation of its corrosion fatigue behavior is important. In this research, after microstructural studies, mechanical, corrosion, fatigue and corrosion fatigue tests were performed on 17-4pH specimens. Fatigue and corrosion fatigue tests were carried out at the  stress ratio of -1 an...

Journal: :international journal of iron & steel society of iran 2015
a. abyazi a. r. ebrahimi

microalloyed s355n steel plates are extensively used in bridge and high-rise building structures. one ofthe factors affecting the mechanical properties is the size and morphology of inclusions. in this research,microalloyed s355n steel plates with different sizes of inclusions were examined. one contained longmanganese sulfide inclusions (li material) and the other had short ones (si material)....

Electroless Ni-P (EN) plating, as an important group of metallic coatings, employed in a wide range of industrial applications. The current work aims to investigate the effects of pretreatment process before EN plating on fatigue behavior of SAE 1045 steel. The specimens of rotating bending fatigue test were prepared from the steel in two series. A group of samples used in as-polished con...

2017
Li Song Jian Hou

This paper presents a fatigue assessment model that was developed for corroded reinforced concrete (RC) beams strengthened using prestressed carbon fiber-reinforced polymer (CFRP) sheets. The proposed model considers the fatigue properties of the constituent materials as well as the section equilibrium. The model provides a rational approach that can be used to explicitly assess the failure mod...

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