نتایج جستجو برای: bailey norton creep law

تعداد نتایج: 179139  

Journal: :International journal for numerical methods in biomedical engineering 2013
Luca Deseri Mario Di Paola Massimiliano Zingales Pietro Pollaci

In this paper, the authors introduce a hierarchic fractal model to describe bone hereditariness. Indeed, experimental data of stress relaxation or creep functions obtained by compressive/tensile tests have been proved to be fit by power law with real exponent 0 ⩽ β ⩽1. The rheological behavior of the material has therefore been obtained, using the Boltzmann-Volterra superposition principle, in ...

2013
James Ladyman Katie Robertson

Ladyman et al (2007) proposed a model of the implementation of logical operations by physical processes in order to clarify the exact statement of Landauer’s Principle, and then offered a new proof of the latter based on the construction of a thermodynamic cycle, arguing that if Landauer’s Principle were false it would be possible to harness a machine that violated it to produce a violation of ...

2016
Tejeet Singh Ishavneet Singh

Abstract—The present study focused on carrying out the creep analysis in an isotropic thick-walled composite cylindrical pressure vessel composed of aluminum matrix reinforced with silicon-carbide in particulate form. The creep behavior of the composite material has been described by the threshold stress based creep law. The values of stress exponent appearing in the creep law were selected as ...

2005
G. Zöller S. Hainzl M. Holschneider Y. Ben-Zion

[1] We show that realistic aftershock sequences with space-time characteristics compatible with observations are generated by a model consisting of brittle fault segments separated by creeping zones. The dynamics of the brittle regions is governed by static/kinetic friction, 3D elastic stress transfer and small creep deformation. The creeping parts are characterized by high ongoing creep veloci...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده مهندسی معدن 1393

مشکل پایداری چاه از گذشته وجود داشته و در سال¬ های اخیر نیز با چالش¬ های جدید مواجه شدهاست که بررسی مشکلات پایداری چاه را سخت¬تر می کند. اما همچنان مهمترین مسئله، حل ناپایداری چاه است. پایداری چاه در حین حفاری و بعد از تکمیل آن یکی از مشکلات اساسی در صنعت حفاری نفت است. ناپایداریچاه که می¬تواند شامل کاهش قطر چاه یا گیرکردن رشته حفاری و ...شود، در هر زمانی سبب اتلاف در وقت و افزایش هزینه می شود ...

Journal: :Physical review letters 2010
Mukul Kabir Timothy T Lau David Rodney Sidney Yip Krystyn J Van Vliet

Here we report kinetic Monte Carlo simulations of dislocation climb in heavily deformed, body-centered cubic iron comprising a supersaturation of vacancies. This approach explicitly incorporates the effect of nonlinear vacancy-dislocation interaction on vacancy migration barriers as determined from atomistic calculations, and enables observations of diffusivity and climb over time scales and te...

Journal: :Soft matter 2015
Fabian M Hecht Johannes Rheinlaender Nicolas Schierbaum Wolfgang H Goldmann Ben Fabry Tilman E Schäffer

We developed force clamp force mapping (FCFM), an atomic force microscopy (AFM) technique for measuring the viscoelastic creep behavior of live cells with sub-micrometer spatial resolution. FCFM combines force-distance curves with an added force clamp phase during tip-sample contact. From the creep behavior measured during the force clamp phase, quantitative viscoelastic sample properties are e...

2013
William Harrison Mark Whittaker Steve Williams

Recent work in the creep field has indicated that the traditional methodologies involving power law equations are not sufficient to describe wide ranging creep behaviour. More recent approaches such as the Wilshire equations however, have shown promise in a wide range of materials, particularly in extrapolation of short term results to long term predictions. In the aerospace industry however, l...

2017
Dan Liu Dirk John Pons

Background—Creep-fatigue behavior is identified as the incorporated effects of fatigue and creep. One class of constitutive-based models attempts to evaluate creep and fatigue separately, but the interaction of fatigue and creep is neglected. Other models treat the damage as a single component, but the complex numerical structures that result are inconvenient for engineering application. The mo...

Journal: :Int. J. Math. Mathematical Sciences 2012
Vandana Gupta Satya Bir Singh

Steady-state creep response in a rotating disc made of Al-SiC particle composite having linearly varying thickness has been carried out using isotropic/anisotropic Hoffman yield criterion and results are comparedwith those using vonMises yield criterion/Hill’s criterion ignoring difference in yield stresses. The steady-state creep behavior has been described by Sherby’s creep law. The material ...

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