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  • 1
    Electronic Resource
    Electronic Resource
    Bridging toughening of epoxy resins by dispersed thermoplastics (1989)
    Springer
    Acta mechanica Sinica 5 (1989), S. 332-342 
    Details
    ISSN: 1614-3116
    Keywords: bridging model ; toughening ; crack pinning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The particulate toughening behaviour of epoxy resins modified by ductile thermoplastics is elucidated here by various bridging models. The experimental data for three different epoxy/PSF systems are presented to illustrate the trend of the toughening characteristics. The conventional continuous bridging model is shown to have underestimated the effect of the particulate toughening. Ajoint application of the discrete bridging model and the multiple bridging model, however, shows promising result for modified epoxy systems such as AG80/DDS/PSF and E51/DDS/PSF. These models also provide quantitative descriptions for the crack pinning phenomenon previously observed by Fu and Sun[1] in AG80/DDS/PSF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02488006
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  • 2
    Electronic Resource
    Electronic Resource
    Crack tip superblunting: experiment, theory and numerical simulation (1993)
    Springer
    Acta mechanica Sinica 9 (1993), S. 131-141 
    Details
    ISSN: 1614-3116
    Keywords: crack tip superblunting ; polyproplene ; toughening ; numerical simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Experimental revelation ofsuperblunting along plane strain predominant crack tip segment is reported here for modified polyproplene. As elucidated by a heuristic model of progressive circumferential cold-draw, the formation of superblunting crack tip depends critically on the ratio between the cold-draw propagation speed and the loading speed, and contributes significantly to the material toughening, especially for the improvement in impact toughness. Detailed numerical calculations are conducted based on a hyperelastic-viscoplastic and anisotropic damage constitutive model at finite deformation. The simulated results recapitulate the essential features of crack tip superblunting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02487492
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    Paper (German National Licenses)
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