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  • 1
    Electronic Resource
    Electronic Resource
    LOW CYCLE FATIGUE LIVES OF NOTCHED COMPONENTS (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 12 (1989), S. 0 
    Details
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract— In low cycle fatigue situations, the plastic behaviour of the material at the root of stress concentrators is of prime importance in determining the cyclic life. However, simple procedures such as Neuber's rule do not adequately describe the development of plastic behaviour at a notch root, while the expense of a finite element analysis is not justified in many instances. This paper describes a simple, approximate numerical method of calculating plastic notch stresses and strains that would be of use in such situations. The usefulness of the technique is demonstrated by comparing low cycle fatigue lives predicted from notch plastic strains with those determined by fatigue testing of smooth specimens subjected to similar plastic strain ranges.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.1989.tb00528.x
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of solids concentration in dense suspensions of silica-iron(III) oxide and water (1988)
    Springer
    Rheologica acta 27 (1988), S. 197-201 
    Details
    ISSN: 1435-1528
    Keywords: Densesuspension ; power-lawflow ; entropy ; iron oxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The rheological properties of dense suspensions, of silica, iron (III) oxide and water, were studied over a range of solids concentrations using a viscometer, which was modified so as to prevent settling of the solid components. Over the conditions studied, the material behaved according to power—law flow relationships. As the concentrations of silica and iron(III) oxide were increased, an entropy term in the flow equation was identified which had a silica dependent and an iron (III) oxide dependent component. This was attributed to a tendency to order into some form of structural regularity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01331905
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  • 3
    Electronic Resource
    Electronic Resource
    Flow mechanisms in dense silica-metal oxide-water suspensions (1988)
    Springer
    Rheologica acta 27 (1988), S. 76-81 
    Details
    ISSN: 1435-1528
    Keywords: Densesuspension ; metal oxide ; silica ; settling ; plasticflow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The rheological properties of dense silica in water suspensions (approx. 50% solids by volume) containing additions of metal oxides were examined. Metal oxides used were ferric, zinc and stannic. To prevent settling, testing was performed in a rheometer which was modified to provide for continual stirring of the materials. Relatively small oxide additions had the effect of thickening the mixtures and making them non-Newtonian. Different rate-limiting steps for flow were identified depending on the particular mixture, testing temperature and shear strain rate. Flow could be described using empirical equations which are identical to those often used to describe plastic flow in solid crystalline materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01372453
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  • 4
    Electronic Resource
    Electronic Resource
    Strength loss in E-glass fibres after exposure to organic acids (1985)
    Springer
    Journal of materials science 20 (1985), S. 3325-3328 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The corrosion of E-glass fibres has been investigated in aqueous solutions of selected organic acids. Although most organic acids have very little corrosive effect, oxalic acid and mesoxalic acid (2-oxopropanedioic acid) are extremely corrosive. The mechanism of the corrosion process appears to be related to three factors: relatively high acidic strength, formation of an insoluble calcium salt, and an ability to form stable complexes with cations present in the glass. This corrosion is extremely important when glass fibre composites are used in conditions where oxidative breakdown (e.g. by electric fields or ultraviolet radiation) of the resin material is likely to occur, as the two most corrosive organic acids are likely breakdown products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00545202
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  • 5
    Electronic Resource
    Electronic Resource
    Strength loss in E-glass fibres after exposure to hydrochloric, hydrobromic and hydriodic acids (1985)
    Springer
    Journal of materials science 20 (1985), S. 3320-3324 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The corrosion of E-glass fibres by hydrochloric, hydrobromic, and hydriodic acids has been investigated by measuring the loss of mechanical strength of the fibres following immersion in solutions of the acids. Corrosion is greatest in hydrochloric acid and least in hydriodic acid. Curves of percentage strength retention against concentration show well-defined minima for hydrochloric and hydrobromic acids, but not for hydriodic acid. This phenomenon has been attributed to complex ion formation by metal ions in the glass with chloride or bromide ions in the corroding solution. Spectroscopic evidence suggests that ferric ions play an important role in the corroding process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00545201
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  • 6
    Electronic Resource
    Electronic Resource
    Strength loss in ″E″ glass fibres treated in strong solutions of mineral acids (1984)
    Springer
    Journal of materials science 19 (1984), S. 3849-3854 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The strength loss of “E” glass fibres following treatment with solutions of nitric, sulphuric and hydrochloric acids have been studied as a function of hydrogen ion activities. The anion present in the corroding medium has at least as much influence on behaviour as does the hydrogen ion activity. Corrosion can be slowed considerably by the addition of metal ions to the acid solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00980747
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  • 7
    Electronic Resource
    Electronic Resource
    Chemical corrosion of E-glass fibres in neutral phosphate solutions (1986)
    Springer
    Journal of materials science 21 (1986), S. 2175-2178 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Following local reports of failure of glass reinforced plastic (GRP) tanks used for the storage of ammonium orthophosphate fertilizer, the effect of phosphate solutions on the strength retention of E-glass fibre was investigated. Although solutions (1 to 5 mol dm−3) of mineral acids are known to corrode E-glass fibre, phosphoric acid solution (3 mol dm−3; pH 1.55) is essentially inert and strength retention of the glass fibre after 15 days exposure is the same as the water control. However, as the pH is raised strength retention is diminished and a minimum is observed around pH 7 to 8. A chemical explanation of this behaviour is put forward in terms of leaching and complex formation with calcium and magnesium ions. Although not nearly as corrosive as other agents, evidence suggests that phosphate solutions do corrode E-glass fibre and this should be borne in mind when GRP materials are used in such chemical environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00547966
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  • 8
    Electronic Resource
    Electronic Resource
    Material properties of arthropod cuticles: The arthrodial membranes (1976)
    Springer
    Journal of comparative physiology 109 (1976), S. 177-198 
    Details
    ISSN: 1432-136X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. On the basis of tensile mechanical properties fibre-reinforced arthropod cuticles can be classified into two main types: one in which the stiffness is provided mainly by the matrix and the other in which stiffness derives largely from the chitin fibres. 2. These two types of cuticle can be related directly to function: the former is relatively hard and stiff and typical of sclerites and thus imparts skeletal rigidity and chiefly subserves a protective function, the latter gives rise to relatively soft and supple, yet flexible materials commonly encountered in arthrodial membrane cuticle. 3. Some cuticles show elements of both of the above types. It appears that these intermediate cuticles are specialized forms and occur as optimizations between the main functions of protection and locomotion, as in caterpillars. 4. It is concluded that a description of arthropod cuticle in mechanical terms is better suited to the understanding of function and is therefore biologically more meaningful than are classifications based on either fibre architecture or histological staining reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00689417
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