Briscoe, BJ & Thomas, PS 1995, 'Brittle-Ductile Transitions in High Density Polyethylene Films', Tribology Series, vol. 30, no. C, pp. 153-160.
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The paper describes a peculiar transition in the interface rheology or frictional characteristics of high density polyethylene thin films. This transition is unusual in the sense that the transition is apparently from a ductile phase to a brittle phase as the temperature increases. The transition is observed to be a function of the contact pressure and strain rate. Again, and peculiarly, the transition is observed to decrease with an increase in both of these contact mechanical parameters. In addition, the vibrational spectra of HDPE as a function of temperature are examined in order to identify a mechanism for this transition. Due to the unusual nature of the transition, the mechanism sought is not at the molecular level, but is rationalised in term of the melting dynamics of the crystalline lamellae of HDPE. © 1995 Elsevier Science B.V.
Briscoe, BJ & Thomas, PS 1995, 'Structure-Property Relationships in Thin Solid Poly(methyl methacrylate) Boundary Films', Tribology Transactions, vol. 38, no. 2, pp. 382-388.
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KHATRI, RP, SIRIVIVATNANON, V & GROSS, W 1995, 'EFFECT OF DIFFERENT SUPPLEMENTARY CEMENTITIOUS MATERIALS ON MECHANICAL-PROPERTIES OF HIGH-PERFORMANCE CONCRETE', CEMENT AND CONCRETE RESEARCH, vol. 25, no. 1, pp. 209-220.
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Stuart, BH & Thomas, PS 1995, 'Xylene swelling of polycarbonate studied using Fourier transform Raman spectroscopy', SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, vol. 51, no. 12, pp. 2133-2137.
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The Fourier transform (FT) Raman spectrum of polycarbonate (PC) is reported. The effect of xylene on the structural properties of PC has been investigated. Changes to the FT/Raman spectrum of PC in the presence of xylene are believed to be due to an incr
Taylor, D 1995, 'Short fatigue crack growth in cast iron described using P−a curves', International Journal of Fatigue, vol. 17, no. 3, pp. 201-206.
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A new approach to the description of short crack growth - the P - a curve - has been tested using extensive data on submillimetre cracks in a grey cast iron. It is shown that this approach, in which the probability of growth is plotted as a function of crack length, is valid in that it produces a plot that is consistent from specimen to specimen and is a function of both crack length and stress level. The growth probability, Pg, can be defined systematically in terms of the average amount of crack growth, Îcmean within a given interval of cycles, ÎN; this leads to the concept that Pg characterizes growth at a particular rate: Îcmean/ÎN. Predictions were made of the endurance, Nf, using a numerical model that simulates the growth of a large number of cracks. Crack coalescence was found to be a critical feature, both of the model and of the experimental findings. The great majority of crack growth was found to occur by coalescence; a simple model of coalescence, based on fracture mechanics, was successfully incorporated into the predictions.
Khalili, N & Khabbaz, MH 1970, 'On the theory of three-dimensional consolidation in unsaturated soils', UNSATURATED SOILS, VOLS 1 AND 2, 1st International Conference on Unsaturated Soils (UNSAT 95), A A BALKEMA, PARIS, FRANCE, pp. 745-750.
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A more complete and unified treatment of the theory of three-dimensional unsaturated consolidation is presented. The governing differential equations based on the equations of equilibrium, the effective stress concept, Darcyâs law, Fickâs law and the conservation of fluid mass are derived.
