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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

A thermomechanical wear theory

Ting, Bond-Yen 05 1900 (has links)
No description available.

Wear mechanisms in sheet metal forming : effects of tool microstructure, adhersion and temperature /

Gåård, Anders, January 2008 (has links)
Diss. (sammanfattning) Karlstad : Karlstads universitet, 2008. / Härtill 8 uppsatser.

Wear in sheet metal forming /

Gåård, Anders, January 2008 (has links)
Licentiatavhandling (sammanfattning) Karlstad : Karlstads universitet, 2008. / Härtill 5 uppsatser.

Tool life criteria and effect of wear on related variables

Wang, Kuo-King, January 1962 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1962. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 74-76).

An analysis of the structure and wear of grinding wheels by autoregressive-moving average models

Deutsch, Stuart Jay, January 1970 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Abrasive wear properties of ceramic particulates (Al₄C₃) reinforced al-based composites

Tam, Anlam Chi Lam. January 2002 (has links) (PDF)
Thesis (M.Sc.)--City University of Hong Kong, 2002. / At head of title: City University of Hong Kong, Department of Physics and Materials Science, Master of Science in materials technology and management dissertation. Title from title screen (viewed on Sept. 4, 2006) Includes bibliographical references.

Experimental and theoretical studies of the wear of heat exchanger tubes

Magel, Eric E. January 1990 (has links)
A study of heat exchanger tube wear has been completed. A simple theoretical model of elastic/plastic deformation has been developed and used in a new model of wear. Experimental results were used to corroborate the theoretical developments. A literature survey of wear mechanisms and wear models was conducted to provide the author with an opportunity to familiarize himself with current knowledge of the field of tribology. Experiments were conducted to simulate a heat exchanger tube/support wear system. For the first series of experiments, a simple impacting rig was used, while a second set was conducted using a much more accurate rig and facilities of the National Research Council of Canada's Tribology Laboratory. Modifications to the NRC rig were designed by the author to incorporate the specific specimen geometries. The main operating parameters of the test apparatus were varied in an effort to determine their effect on wear rates. Force and displacement data were collected and the normal and shear forces calculated, as was the work input. Comparison between the frictional work input and the measured wear showed that there was an approximately linear correlation between work and wear rates. Inspection of the surfaces of the worn specimens showed that a number of wear mechanisms operate in this wear system but that wear is primarily due to delamination and shear fracture. Also, it was noticed that the micro-surface geometry of the worn specimens has a consistent texture, regardless of magnitude and angle of impact between the tube and ring. A model of plastic contact deformation was developed to allow calculation of the contact parameters between two surfaces, given that the softer surface is repeatedly plastically deformed. This model says that repeated stress cycles lead to the introduction of residual stresses, which combined with work hardening of the material, lead the softer material to an elastic shakedown state. Once the typical asperity contact state is known, the typical stress distribution is calculated using Hertzian line contact stress formulae. A series of computer programs were developed to calculate the stress distribution beneath a sliding contact. The depth of maximum shear stress can then be found. This depth corresponds to the expected wear particle thickness. A wear sheet was assumed to form when the frictional work input is equal to the energy required to cause failure in ductile shear. A wear equation was then developed to predict the wear rate between a heat exchanger tube and its support. The final wear model has seen limited comparison with experimental results. The theoretical work input was found to be about 25% of the correlated bulk work. This indicates that the geometry assumptions of the model are quite reasonable. Unfortunately, the predicted wear rate was found to exceed the measured values by a factor of about 5000. If this empirical value is factored into the the wear model, then the predicted results are found to correspond well with the experimental values. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate

Study on wear particles of gas turbines during running-in

郭傑明, Kwok, K. M. January 1982 (has links)
published_or_final_version / Mechanical Engineering / Master / Master of Science in Engineering

Long-term performance of pot hardware in continuous galvanizing lines

Parthasarathy, Venkatesh. January 2003 (has links)
Thesis (M.S.)--West Virginia University, 2003. / Title from document title page. Document formatted into pages; contains ix, 73 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 72-73).

Tribological analysis of popping phenomena in sprag clutches

Ishii, Yuji 12 1900 (has links)
No description available.

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