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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 20 of 20 for “"impact properties"”.
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Relationships between micromorphology and impact properties of injection moulded isotactic polypropylene
The micromorphology and properties of injection moulded semi-crystalline polymers can be significantly modified by changes in the injection moulding parameters and the design of mould. Further modifications to the microstructure and properties occur following the incorporation of additives into a …
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Improving Impact Properties of Novatein through Polymer Blending and Reactive Extrusion
… thermoplastic made from protein and requires impact strength modification before it can be used in a wider variety of applications, such as in the agricultural, horticultural and meat processing industries. Polymer blending is often used for improving material properties cost effectively. This …
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Some of the effects of bainite on the impact properties of steel
Thesis (M.S.)--Michigan State University. Dept. of Metallurgy, Mechanics, and Materials Science, 1964
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Investigation into the Effects of Wire Mesh on Tensile and Impact Properties of Fiber Metal Laminates
… study was conducted into the tensile and impact behavior of Fiber Metal Laminates by combining 5052 aluminum mesh or2024-T3 aluminum sheets,2.47 N (8.9 oz) or 6.67 N (24 az) ShieldStand<sup>®</sup> S fiberglass, and Hysol EA 9313 epoxy. Testing was performed under the guidelines of ASTM …
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Effects of Fatigue in the Elastic Regime on the Impact Properties of Nuclear Pressure Vessel Steels and Its Relation to Fracture Toughness
Made available in DSpace on 2017-07-06T18:49:10Z (GMT). No. of bitstreams: 3 Canty_Robert_W_MS.pdf: 44893344 bytes, checksum: 36b04769a61e51628aa6cd3ec4b26d75 (MD5) Canty_Robert_W_MS_ABS.pdf: 529441 bytes, checksum: bdae3bda0f7e90e23a00e5d0439f8a81 (MD5) license.txt: 4813 bytes, checksum: …
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Studies of the Human Head from Neonate to Adult: An Inertial, Geometrical and Structural Analysis with Comparisons to the ATD Head
… geometrical, inertial, structural stiffness, and impact properties. The computational tomography (CT) method was used on pediatric heads to get inertial properties, and clinical CT scans were used to develop average head and skull contours for 12 different age groups. To obtain impact properties, …
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Fracture properties analysis of rotationally moulded plastics for their application in skin-foam-skin sandwich structure
… or other moulding processes. The mechanical properties of rotationally moulded plastics are totally dependent on unique heating or cooling cycles. With the growing demand for rotationally moulded plastics in load bearing and other applications, a better understanding of their fracture …
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The impact toughness of iron manganese alloys.
… boundaries. The present investigation shows that impact toughness can be improved by tempering to produce small amounts of reverted austenite into the structure. In quantifying the percentages of reverted austenite in these structures. X-ray and Mossbauer studies have shown that the phase analysis …
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Regioselective Synthesis of Cellulose Esters
… and matrices for controlled release. The properties of cellulose derivatives are not only affected by the degree of substitution, but also by the position of substitution. In order to establish the structure-property relationships of cellulose derivatives, it is of great importance to …
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Characterization of natural fibre reinforced biodegradable composities
… also adding Biomax modifier on the mechanical properties of poly lactic acid. PLA was reinforced with two different kinds of sustainable natural fibres, cotton, and jute fibres respectively. Biomax strong 120 was used as modifier for PLA/natural fibre composites in order to improve the impact …
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The fracture characteristics of a boron containing high strength low alloy steel
… testing of RQT 701 showed a variation inthe impact transition temperature through the thickness ofthe plate. This study examines the possible causes of thisvariation in impact properties and makes a full assessment of the mechanical properties of RQT 701. A full metallographic investigation …
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A study of the transformation behaviour and mechanical properties of iron-manganese alloys.
… both the transformation behaviour and mechanical properties of a series of very low carbon iron manganese alloys within the range 0 to 10% manganese. Alloys containing between 4 and 10% manganese were found to undergo a martensitic transformation which was identical to the lath or massive …
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Wave tailoring in elastic and elastoplastic granular systems
… granules of distinct sizes and material properties using quasistatic finite element simulations. Extensive numerical studies are then conducted on the dynamics of elastic and elasto-plastic granular chains under a wide range of loading conditions and models are developed for predicting …
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An investigation of the failure mechanisms of thermoplastic composites at various rates of strain and temperatures
… 6-6 were tested in tension, flexure and impact (lzod, Charpy and drop-weight). Two different injection-moulding machines were used for specimen manufacture. These were an automated injection moulding machine simulating good control of processing conditions and a simple hand operated …
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Understanding the Effect of Sizing and Cellulose Nanocrystals on S2 Glass Fiber Sheet Molding Compounds
… mechanical performance. Excellent mechanical properties and low density coupled with increased ease of processibility are what distinguishes GFRPs over metallic materials. Emphasis has been given mainly to E-glass fibers as their low cost drove their demand. This work focuses on the more …
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Development of a new method for fibre reinforced rotational moulding
… woven fabric. Mouldings were tested for flexural properties, impact properties and Inter Laminar Shear Strength. The best results were found for woven PP-Twintex fabric and PP/glass melt impregnated tape in polypropylene. In the latter case, the Flexural Modulus measured was the same as the …
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Phase transformations in welded supermartensitic stainless steels
… to be more prone to δ- ferrite retention. Charpy impact toughness tests performed on simulated heat-affected zones revealed a weak effect of δ-ferrite on the HAZ ductile to brittle transition temperature. In fact, due to its larger grain size, the coarse-grained HAZ determined the impact …
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Effect of fatigue loading on impact response of rat ulna
… fracture is a consequence of both fatigue and impact loading of the bone that will potentially threat athletes’ careers. Scientists and engineers have studied the fatigue properties of many engineering materials, and more recently biological materials. Investigating the role of fatigue on …
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Engineering properties of multiphase block copolymers
… effects of microphase separation on the tensile, impact, and melt flow properties of the copolymers were investigated. A novel falling weight impact tester was designed and constructed to meet the needs of this study. The device was fully instrumented to provide a deceleration-time plot of the …
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Solid-state Polymer Nanofoams
This work explores the fabrication and properties of solid-state polymer nanofoams. Polymer nanofoams, which are expected to be the next generation cellular materials, have attracted much attention in the past decade. Nanoscale dimension of the bubbles could potentially render the nanofoams to have …