نتایج جستجو برای: fatigue analysis

تعداد نتایج: 2882271  

ژورنال: یافته 2019

Background: The first technique for relaxing the body's muscles and relieving fatigue is relaxation, but another method for improving chronic fatigue is cognitive-behavioral therapy. According to these definitions, the purpose of this study was to compare the effectiveness of two methods of psychological treatment (cognitive-behavioral therapy) and muscle relaxation (relaxation) in reducing the...

Fadavie-Ardestani, M. , Kesharvarz, A. , Ranjbarnodeh, E., Saeed Kiasat, M. ,

Nowdays, the prediction and prevention of fatigue failures is converted to one of the most concerns for industry owners. Since the processes of fatigue suddenly occur, it is most important and necessary to recognize the effective factors of fatigue life of structures. Mechanical and thermal multiple loading are the important factors of the fatigue failure. In order to appropriate fatigue design...

Journal: :international journal of transportation engineering 0
babak golchin assistant professor, department of civil engineering, ahar branch, islamic azad university, ahar, iran ahmad mansourian department of bitumen and asphalt, road, housing and urban development research center, tehran, iran

this paper presents the effects of different amounts of reclaimed asphalt on fatigue life of asphalt mixtures. central composite method was used to design of experiments based on response surface method (rsm). binder type (pen 60/70 and pen 85/100), reclaimed asphalt pavement (rap) content (25, 50 and 75%) and loading strain (150, 250 and 350 micro strain) were selected as independent variables...

ژورنال: Journal of Railway Research 2014
Farrahi, G.H., Masoudi Nejad, R., Salehi, S.M,

This paper presents the prediction of fatigue life and crack propagation in the railway wheel due to the stress field caused by mechanical loads and press fitting process of a railway wheel. A 3-D nonlinear stress analysis model has been applied to estimate stress fields of the railway wheel in press fitting process. Finite element analysis model is presented applying the elastic–plastic fin...

ژورنال: سلامت کار ایران 2014

Background and aim: Occupational fatigue due to its negative impacts of occupational fatigue on workers’ safety, performance and general health, has been increasingly considered. The objective of the present study was to assess reliability and construct validity of Persian version of Occupational Fatigue/Exhaustion Recovery questionnair (OFER-15) among Iranian working population. Method: In thi...

Journal: :iranian journal of pharmacology and therapeutics 0
a. hamzei-moghaddam b. sedighi farhad iranmanesh mohammad hosein abdi

fatigue is recognized as one of the most disabling and frequent symptoms of multiple sclerosis (ms). amantadine appears to have some proven ability to alleviate the fatigue in ms. the aim of this study was to assess the efficacy of co-administration of amantadine and aspirin for the treatment of fatigue in multiple sclerosis. forty-five ambulatory patients aged 20–50 years with a diagnosis of m...

Journal: :iranian journal of nursing and midwifery research 0
fatemeh nazari mozhgan soheili shahreza vahid shaygannejad mahboubeh valiani

abstract background: fatigue is the most common and highly disabling symptom of multiple sclerosis (ms) that has negative effects on employment, the process of socialization, compliance with the disease, and other factors effective on activities of daily living. the usage of complementary and alternative medicine methods in ms patients is higher than in the general population. however, there is...

ژورنال: ارگونومی 2015
آقابیگی, ماندانا, جوادپور, فوزیه, چوبینه, علیرضا, کشاورزی, ساره,

  Introduction: Perceived work-related fatigue is an important issue since it may adversely impact workers’ performance. Additionally, workers’ fatigue is known as a main cause of occupational accidents in workplaces. Considering the consequences of perceived work-related fatigue, assessing fatigue at workplace is critical to work-related fatigue risk management. Therefore, this study...

Journal: :فصلنامه علمی پژوهشی مهندسی مکانیک جامدات واحد خمینی شهر 0
ali abdollahifar malekashtar university mohammad amin khoshuee malekashtar university seyyed masoud hashemi malekashtar university

the crankshaft is one of the most critically loaded components as it experiences cyclic loads in the form of bending and torsion during its service life. its failure will cause serious damage to the engine so it’s important at the time of design to verify fatigue strength. more challenges in crankshaft design due to increasing vehicle payloads, lower weight requirement, higher efficiency and lo...

Excellent mechanical properties and fatigue performance of Al/Al2O3 metal-based nanocomposites caused to introduce this material as a good candidate for various applications. In this regard, the preparation and characterization of this composite can be considered as a hot issue for research. The study was carried out in several steps including: (i) preparation of Al/Al2O3 metal-based nanocompos...

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