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  • 1
    Electronic Resource
    Electronic Resource
    An algorithm for the simulation of transient viscoelastic flows with free surfaces
    Amsterdam : Elsevier
    Journal of Computational Physics 62 (1986), S. 199-220 
    Details
    ISSN: 0021-9991
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Computer Science , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0021-9991(86)90107-5
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Progress and challenges in computational rheology (1990)
    Springer
    Rheologica acta 29 (1990), S. 556-570 
    Details
    ISSN: 1435-1528
    Keywords: Numerical simulation ; viscoelastic fluids ; finite element techniques
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Our research work over the last few years serves to illustrate the basic issues associated with the numerical prediction of rheologically-complex flows, with particular emphasis on viscoelastic fluids. Numerical challenges in this field are shown to be tightly coupled to the mathematical nature of the governing equations, as well as to fundamental physical issues such as flow behavior close to walls and singularities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01329302
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Solid phase change controlling the tensile and creep behaviour of gel-spun high-modulus polyethylene fibres (1992)
    Springer
    Journal of materials science 27 (1992), S. 4515-4522 
    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 Tensile and creep tests have been conducted on monofilaments of gel-spun high-modulus polyethylene fibres. Fibre strength has been determined over a temperature range −175–100 °C. The creep studies have revealed changes in behaviour which depend on the applied stress and the temperature. The results of these studies are explained by a change in crystallographic structure from orthorhombic to hexagonal which can take place under certain conditions of temperature and applied stress. It has therefore been possible to determine the applied stress necessary to obtain the change of phase as a function of temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00541588
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A new data reduction scheme for the fragmentation testing of polymer composites (1995)
    Springer
    Journal of materials science 30 (1995), S. 683-692 
    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 A new reduction scheme of fragmentation data for the derivation of interfacial mechanical properties in polymer composites is proposed. The scheme is based on a theoretical model that accounts for elastic load transfer and friction at the interface, as well as for the statistical nature of fibre strength. Interface mechanical behaviour is characterized by two independent parameters, namely the interface bond strength and interface frictional resistance. Derived values of the two interface properties are computed, such that they yield the best possible agreement between experimental and theoretical results for the evolution of fibre fragment aspect ratio and debonding ratio as a function of applied strain. Results are reported for carbon fibres embedded in an epoxy matrix, with different levels of fibre surface treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356328
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  • 5
    Electronic Resource
    Electronic Resource
    Finite element modelling of the flow of chemically reactive polymeric liquids (1995)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 20 (1995), S. 319-334 
    Details
    ISSN: 0271-2091
    Keywords: Chemically reactive flows ; Finite element analysis ; Polymeric fluids ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: We consider steady state and time-dependent flows of chemically reactive polymeric systems in two-dimensional geometries. A numerical simulation tool is proposed for predicting the evolution of the macroscopic velocity, temperature, stress and species concentration fields in such flows. We formulate a general mathematical model on the basis of the first principles of continuum mechanics, which includes a description of the non-liner coupling between kinematics, heat transfer and chemical kinetics. The resulting set of non-linear partial differential equations is solved numerically by means of appropriate finite element techniques. We have implemented the resulting numerical model in the general-purpose POLYFLOWR software developed in Louvain-la-Neuve, Belgium. Simulation results for various steady state and time-dependent reactive flows are reported.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650200405
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Parallel computation of the flow of integral viscoelastic fluids on a heterogeneous network of workstations (1994)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 18 (1994), S. 1167-1183 
    Details
    ISSN: 0271-2091
    Keywords: Parallel numerical algorithms ; Load-balancing schemes ; Network of workstations ; Parallel software tools ; PVM ; Viscoelastic fluids ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: We consider the parallel computation of flows of integral viscoelastic fluids on a heterogeneous network of workstations. The proposed methodology is relevant to computational mechanics problems which involve a compute-intensive treatment of internal variables (e.g. fibre suspension flow and deformation of viscoplastic solids). The main parallel computing issue in such applications is that of load balancing. Both static and dynamic allocation of work to processors are considered in the present paper. The proposed parallel algorithms have been implemented in an experimental, parallel version of the commercial POLYFLOW package developed in Louvain-la-Neuve. The implementation uses the public domain PVM software library (Parallel Virtual Machine), which we have extended in order to ease porting to heterogeneous networks. We describe parallel efficiency results obtained with three PVM configurations, involving up to seven workstations with maximum relative processing speeds of five. The physical problems are the stick/slip and abrupt contraction flows of a K.B.K.Z. integral fluid. Using static allocation, parallel efficiencies in the range 67%-85% were obtained on a PVM network with four workstations having relative speeds of 2:1:1:1. Parallel efficiencies higher than 90% were obtained on the three PVM configurations using the dynamic load-balancing schemes.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650181204
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    Paper (German National Licenses)
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