Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Archard"”.
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Infrared radiometric measurements of surface temperatures generated by friction of sliding iron-on-sapphire
… flash temperature theories by both Jaeger and Archard is made.
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An experimental investigation of the effect of subdivision of contact area on surface temperatures generated by friction
… that the surface temperatures predicted by the Archard and Jaeger theories correctly described the influence of nominal load and sliding velocity on the experimental surface temperatures. A detailing description of the experimental apparatus, the radiation analysis used to convert the radiance …
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Infrared measurements of steady-state temperatures and average surface temperature distributions for silver sliding on sapphire
… well with the theoretical predictions of Archard and Jaeger. Load and environment were found to have a significant effect on the coefficient of friction. The average value of the coefficient of friction for each test was lower in nitrogen than in air. Load, geometry, velocity, and …
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Experimental Analysis of Empirical Model for Friction and Wear in Rubber on Dry Concrete
… and found that model proposed by Dorsch and Archard had the best performance for friction and wear, respectively.
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An experimental investigation of the surface temperature of graphite in a sliding system using an infrared microscope
… of contact predicted by the theories of Blok, Archard, Jaeger, and Holm. Possible reasons for discrepancies between theory and experiment were also examined.
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Nanocrystalline alloys : enhanced strengthening mechanisms and mechanically-driven structural evolution
… wear resistance and results in a deviation from Archard scaling. Finally, molecular dynamics simulations are performed to confirm that mechanical cycling alone can indeed relax grain boundary structure and strengthen nanocrystalline materials. In all of the cases discuss above, our observations …
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Fostering a capacity for connectedness: The contribution of “humanness” in hybrid early childhood initial teacher education programmes
This thesis provides an in-depth understanding of human connections between lecturers and ECE student teachers in one hybrid early childhood initial teacher education programme in Aotearoa New Zealand. More specifically, the focus of the research is the ECE student teachers’ perspective of their …
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Discrete element method simulation of wear due to soil-tool interaction
… between the tool and soil particles. The Archard equation for wear was modified to create a non-linear equation. Plotting the measured wear against the wear predicted from the fitted equation produced a trendline with a slope of 0.65. Although a perfect correlation would have produced a …
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Modelling and simulation of themo-mechanical phenomena at the friction interface of a disc brake.An empirically-based finite element model for the fundamental investigation of factors that influence the interface thermal resistance at the friction interface of a high energy sliding pair in a disc brake.
… interface was predicted and a comparison of the Archard and Arrhenius wear laws in predicting the wear of a resin bonded composite friction material operating against a cast iron mating surface is presented. A 3-dimensional (3D) model is also presented. This model has represented a small scale …
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Finite element analysis of embankment dam due to rapid drawdown events
The stability of large earth embankment dams is imperative for public safety and economic reasons. Among the numerous potential failure modes (which range from internal erosion to overtopping) slope instabilities can be triggered by changing boundary conditions associated with flood loading or …
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An investigation of thin amorphous carbon-based sputtered coatings for MEMS and micro-engineering applications
… wear and this was generally consistent with the Archard model. Specific wear rates were very low (typically 10-16 - 10-18 m3N-1m-1). Wear rates reduced exponentially with reduced film thickness and below (approx.) 20 nm, thickness was identified as the most important control of wear.
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Development of Comprehensive Experimental, Analytical and, Numerical Methods for Predicting Rubber Friction and Wear under Thermomechanical Conditions
… model for wear was developed by improving the Archard wear model. The novel approach was implemented to Abaqus by using the Umeshmotion subroutine and adaptive mesh motion (ALE) and subroutine UFric and UFric_Coef in two categories: The Node base method and the Ribbon base method. For finite …
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New into old--building into/onto/around/alongside : a school for the arts in Boston's Theater District
The premise of this thesis suggests that these empty and abandoned buildings lying in the heart of various historic districts in our cities be "collaged" together as part of a newer ensemble of spaces. It is proposed that the transformation of these buildings begins with a careful study of the …
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An Investigation of Improving Wear of 390 Die-cast Aluminum Through Hardcoat Anodizing
… changing the hardness of the materials involved. Archard's equation gave tangible evidence of this fact, but related to the base material and not a surface coating. It was hypothesized that Hardcoat anodizing would follow the theory of Archard's equation and increase the wear resistance of 390 …