نتایج جستجو برای: critical failure load
تعداد نتایج: 961182 فیلتر نتایج به سال:
In this study, using the non-local elasticity theory, the buckling and vibration analysis of triple- walled ZnO piezoelectric Timoshenko beam on elastic Pasternak foundation is analytically investigated under magneto-electro-thermo-mechanical loadings. Using the Timoshenko beam free body diagram, the equilibrium equation of Timoshenko nano-beam model is obtained and solved by Navier’s method fo...
This thesis studies the characteristics of cascading failures in a simulated linear swingequation model for simple power networks. The model transitions from displaying only small average failure size to undergoing large average failure size as the loading of the system is increased. For some parameter values, the transition region becomes critical, and it exhibits failures of all sizes whose d...
critical thinking ability has an important role in education. accordingly, scholars around the world are searching for new ways for teaching and improving students critical thinking ability. in line with the studies in efl contexts supporting the positive relationship between critical thinking and writing performances, this study investigated the differential effects of halverson’s critical thi...
in this study, the relationship between teachers’ creative and critical thinking skills and their reflectivity in teaching was investigated. to this end, three questions were raised. these questions were intended to determine whether there was a significant relationship between teachers’ creative thinking skills and their reflectivity in teaching; whether there was a significant relationship be...
A study is made of median crack evolution in brittle coatings subjected to sharp contacts. A model bilayer system consisting of a glass plate bonded to a polycarbonate base, with a Vickers pyramid as indenter, is used to demonstrate the evolution in situ. The cracks undergo a phase of stable downward growth with increasing load. Beyond the coating mid-plane, flexural stresses (coupled with the ...
progressive collapse is a chain reaction of failures propagating throughout a portion of the structure disproportionate to the original local failure occurring when a sudden loss of a critical load‐bearing element initiates a structural element failure, eventually resulting in partial or full collapse of the structure. both general services administration (gsa) and united states department of d...
Inevitable dominance of lean system concepts on operations world in recent decades, has motivated lots of companies to implement them. But not considering the preferences and limited resources, has caused their failure. This paper aims at presenting a methodology for determining leanness path for companies using their leanness critical success and failure factors. For this first lean indexes im...
In this study, the suspension stability of a maglev vehicle is investigated under steady aerodynamic load. The dynamics in vertical direction are modelled by considering lift and pitching moment, model adopted to investigate how load influences analysing critical speed means eigenvalue analysis direct integration. Doing so reveals three modes failure: (i) an upward or moment can give rise dynam...
greater levels of complexity in tunnelling with tunnel boring machine (tbm) allow higher chances of failures that may increase the potential hazardous risks. this paper presents the results of a study on tbm reliability using risk analysis. machinery failure mode and effect analysis was applied to analyze the risks of a tbm using qs9000 and sae.j1739 recommendations. for this purpose, 48 failur...
?it is of utmost priority for an experienced teacher to train the mind of the students, and enable them to think critically and correctly. the most important question here is that how to develop such a crucial ability? this study examines a new way to the development of critical thinking utilizing critical discourse analytical tools. to attain this goal, two classes of senior english la...
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