نتایج جستجو برای: fatigue life
تعداد نتایج: 812074 فیلتر نتایج به سال:
MS illness is a self- safety and inflammatory illness in Central Nervous System in which Myelin Sheath and Axon of neuronal cells of the brain and the spinal cord is destroyed by the Safety System, and the level of its prevalence is two or three times more in women rather than men. The most important complications of this illness are fatigue, cramp, shake, the lack of balance, and walking disor...
polymer application for the improvement and modification of the bitumen used in roads surfaces has expanded in recent decades. the roads engineers and constructors, therefore, have used the modified bitumen in asphalts helping in this way to increase roads and pavements service life and improving the durability of the roads and asphalts. the bitumen used in asphalt mixture constitutes only a lo...
Fatigue is one of the most common and a distressing side effect of cancer and its treatments. It can affect all aspects of patients’ life and leads to several other hardships. To determine fatigue intensity and it’s changing pattern among those suffering from cancer receiving chemotherapy, a descriptive longitudinal study was conducted. The principal method of data collection was a daily diary...
In this study, first by using the finite element method, fatigue life of fiber metal laminates of Glare type subjected to impact was obtained and the numerical results of the model were compared with the experimental results. With regard to the very good matching between numerical and experimental results, then the results of the finite element model were generalized and expanded, and with usin...
Introduction: Varicose veins in the lower limbs commonly occur in the general population and can negatively affect their quality of life. One of the high-risk jobs is the field hairdressers. The aim of this study was to investigate the effects of ergonomic interventions on quality of life of female hairdressers suffering from diseases in the lower extremities varicose veins. Methods: The stu...
The ferritic ductile iron (FCD400) is widely used as industrial material. As regards to its high temperature application, fatigue at elevated temperature, and advanced mechanical properties has been investigated and clarified. In low cycle fatigue (LCF), the S-N curve is presented by the relation of plastic strain to the number of cycles as fatigue life, which can be predicted by the Manson-Cof...
The maximum stress induced plays vital role in fatigue life improvement of leaf springs. To reduce this maximum stress, leaves with different unassembled cambers are assembled by pulling against each other and a common curvature is established. This causes stress concentration or sets assembly stress in the assembled leaf springs which is subtractive from load stress in master leaf while it is ...
Background: Fatigue is the most annoying side effect of cancer treatment in children who experience it from the time of diagnosis till conclusion of therapy. About 75% to 90% of children undergoing chemotherapy suffer from this complication. To relieve this problem, massage therapy is recommended which is the most widely applied adjuvant therapy. The purpose of this study was to...
AIM To determine how instrument design affects the fatigue life of two nickel-titanium (Ni-Ti) rotary systems (Mtwo and ProTaper) under cyclic fatigue stress in simulated root canals. METHODOLOGY Cyclic fatigue testing of instruments was performed in stainless steel artificial canals with radii of curvature of 2 or 5 mm and an angle of curvature of 60 degrees . A total of 260 instruments were...
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