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Showing 1 to 20 of 1349 for “"wear"”.
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An investigation of polymer wear due to fatigue using a constant strain wear test
A constant-strain wear test apparatus was built and used to test polyethyleneterephthalate. The results of the constant-strain wear tests were compared to results from a constant-strain fatigue test. The results of the wear test showed that the polymer did not fatigue below the surface where the …
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Sliding wear of nitrided steels
The unlubricated sliding wear behaviour of gas nitrided, plasma nitrided, and ferritic nitrocarburized BS970,905M39 (EN41B) steels was investigated systematically from an engineering point of view. Commercial nitriding processes were employed, and the wear studies were carried out using a …
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Micromechanisms of polymer sliding wear
… during water-lubricated reciprocating sliding wear. The experimental work has been extended to study also the effect of molecular weight, fillers, lubrication, counterface roughness and sliding configuration on the polymer's transfer characteristics. The wear behaviour of …
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Tool wear in titanium machining
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1981.
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Wear studies of abrasive particles
Thesis: M.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1956
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Biochemical markers and contact lens wear
… to match contact lens materials with individual wearers by the identification of a biochemical marker for assessment of in-eye performance of contact lenses. There is a need for such a procedure as one of the main reasons for contact lens wearers ceasing wearing contact lenses is poor end of day …
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Three-body abrasive wear of materials
… into the phenomenon of three-body abrasive wear. A specially designed three body abrasive wear apparatus has been built, modified and evaluated as part of this overall study. Further, a series of commercially available candidate materials has been evaluated for wear resistance using silica …
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A Model for Abrasive Polymer Wear
The abrasive mechanism of polymer wear is dominant in the startup, or "breakin", stage of polymer/steel sliding systems. This mechanism controls the polymer wear rate until the voids in the hard metal surface are filled, much like the filling observed with a file when used on soft metals. This …
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Testing and Understanding Screwdriver Bit Wear
… to design and test Phillips screwdriver bits. Wear is the primary concern in applications where the bit is used in a power driver. Such applications include drywalling, decking and other construction and home projects. To pursue an optimal design, designers must have an understanding how the …
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Characterization of cyclic plasticity type wear mechanism for titanium alloy, TI-6AL-4V on reciprocating sliding wear test
… the characterization of cyclic plasticity type wear mechanism on reciprocating sliding wear test for Titanium alloy, Ti-6Al-4V. The reciprocating sliding wear test set up by pin-on-flat configuration made from Ti-6Al-4V. Dimension of flat bar used Contact material is 100 x 25 x 8 mm. Meanwhile …
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The sliding wear of polymers against steel
A laboratory wear testing facility has been developed to generate wear rate data for polymeric materials sliding at constant velocity against a hardened stainless steel base. The polymers investigated were ultra high molecular weight polyethylene (UHMWPE), ultra high molecular weight …
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The tear film and contact lens wear
… biological fluid. A common complaint of lens wearers is that they often experience symptoms of dry eye whilst wearing lenses. This sensation is often heightened towards the end of the day. Through the course of this study, various analytical techniques have been utilised including one …
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Relative Wear Resistance of Soil-Aggregate Mixtures
Made available in DSpace on 2014-12-05T17:37:33Z (GMT). No. of bitstreams: 1 6206207.pdf: 3232108 bytes, checksum: 5972c31b874642910bc8f65d059e7934 (MD5) Previous issue date: 1962
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Shearing, ploughing, and wear in orthogonal machining
… due to the rubbing and ploughing of the edge or wear land becomes significant. Predicting forces--and therefore other process outputs such as machined part quality--under these conditions requires an estimate of the effects of ploughing and wear. Furthermore, both ploughing and wear forces are …
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Surface mechanics of polyacrylamide hydrogels following wear
… surfaces following deliberate abrasive surface wear are measured. These polyacrylamide hydrogels – cross-linked polymers consisting of 92% water by mass – undergo surface wear, and their surface elastic properties before and after wear are measured. Quasi-static nanoindentations are performed on …
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Investigation of Severe Abrasive Truck Tyre Wear
In the design of tyres, rolling resistance and wear resistance cannot be optimized at the same time. Tyres with high rolling resistance have good wear performance and good adhesion, whereas tyres with low resistance have poor wear performance and poor adhesion. It is therefore necessary to …
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Abrasive wear testing of steels in soil
… and an evaluation has been made of the relative wear resistance of a series of ·heat treated steels. A medium carbon boron steel has been shown to have great promise as a tillage tool material because of its high wear resistance and toughness. The deformed surface layers and the mechanisms of …
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Mechanics of abrasive wear of elastomeric materials
… with abrasive particles, which act to abrasively wear the elastomers. Elastomeric materials are observed to exhibit a characteristic form of abrasive pattern on the surface after cyclic scratching. The dimension of this pattern is closely related to the wear rate, whereas the formation of this …
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