The non-linear nature of the superelastic phase transformation in NiTi means that conventional fatigue life theory is difficult to apply. The volume fraction of martensite/parent phase and its role in the fatigue mechanism is not understood. This paper considers the fatigue life of superelastic NiTi alloys when tested at 2Hz in Ringers solution. In agreement with other researchers [1] [2] it wa...

background: fatigue is considered as a major problem in hemodialysis patients and can impair their quality of life. the purpose of this study was to investigate the effectiveness of acupressure on fatigue in hemodialysis patients. materials and methods: this is a clinical trial study in which 96 hemodialysis patients participated. patients were randomly assigned into acupressure, placebo, and c...

BACKGROUND Calcification is commonly believed to be associated with cardiovascular disease burden. But whether or not the calcifications have a negative effect on plaque vulnerability is still under debate. METHODS AND RESULTS Fatigue rupture analysis and the fatigue life were used to evaluate the rupture risk. An idealized baseline model containing no calcification was first built. Based on ...

AIM OF THE STUDY To study if the use of a cooling-suit by individuals with multiple sclerosis (MS) influenced their experience of fatigue and consequent restrictions in daily life. BACKGROUND The majority of MS patients consider fatigue as one of their most disabling symptoms and as having a significant impact on their daily lives. Fatigue often increases in a warm environment. A cooling-suit...

This paper describes a finite element based method for simulating the effects of material removal, associated with fretting wear, on fretting fatigue parameters in a spline coupling. An incremental wear simulation technique is implemented with a single tooth finite element model of the coupling for symmetric loading, assuming equal wear on all teeth, using a comparatively coarse mesh model, for...

A micromechanical model is developed for the prediction of growth rate fatigue damage zones in unidirectional fibre composites subjected to cyclic tension-tension loading. The occurs by progressive breaks caused debond crack tip stress fields fibres that have broken earlier load cycles. tips are taken advance along due a slip-induced decrease frictional sliding shear acting debonded parts under...

Inverse first-order reliability method for probabilistic fatigue life prediction of composite laminates under multiaxial loading Yibing Xiang and Yongming Liu* Department of Civil and Environmental Engineering Clarkson University Potsdam NY.13699, USA Abstract: Multiaxial fatigue reliability is a challenging problem despite extensive progress made during the past few decades. Anisotropic materi...

BACKGROUND In primary biliary cirrhosis (PBC) and primary sclerosing cholangitis (PSC) fatigue is a major clinical problem. Abnormal amino acid (AA) patterns have been implicated in the development of fatigue in several non-hepatological conditions but for PBC and PSC no data are available. This study aimed to identify abnormalities in AA patterns and to define their relation with fatigue. ME...

BACKGROUND The purpose of this study was to compare fatigue, depression and quality of life scores in persons with multiple sclerosis who do (Exercisers) and do not (Non-exercisers) regularly participate in physical activity. METHODS A cross-sectional questionnaire study of 121 patients with MS (age 25-65 yr) living in Queensland, Australia was conducted. Physical activity level, depression, ...