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  • 1995-1999  (2)
  • 1925-1929
  • 1997  (2)
  • adaptive dynamics  (1)
  • deformation localization development  (1)
  • 1
    Electronic Resource
    Electronic Resource
    A finite element analysis of the large plastic deformation behavior of amorphous glassy circular polymeric bars (1997)
    Springer
    Acta mechanica solida Sinica 10 (1997), S. 138-147 
    Details
    ISSN: 0894-9166
    Keywords: BPA molecular network model ; finite element formulation ; amorphous glassy circular polymeric bars ; deformation localization development
    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 BPA eight-chain molecular network model is introduced into the finite element formulation of elastic-plastic large deformation. And then, the tensile deformation localization development of the amorphous glassy circular polymeric bars (such as polycarbonates) is numerically simulated. The simulated results are compared with experimental ones, and very good consistence between numerical simulation and experiment is obtained, which shows the efficiency of the finite element analysis. Finally, the influences of the microstructure parameterS ss on tensile neck-propagation and triaxial stress effect are studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02207741
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evolutionarily singular strategies and the adaptive growth and branching of the evolutionary tree (1997)
    Springer
    Evolutionary ecology 12 (1997), S. 35-57 
    Details
    ISSN: 1573-8477
    Keywords: adaptive dynamics ; evolutionarily singular strategy ; evolutionary branching ; evolutionary modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We present a general framework for modelling adaptive trait dynamics in which we integrate various concepts and techniques from modern ESS-theory. The concept of evolutionarily singular strategies is introduced as a generalization of the ESS-concept. We give a full classification of the singular strategies in terms of ESS-stability, convergence stability, the ability of the singular strategy to invade other populations if initially rare itself, and the possibility of protected dimorphisms occurring within the singular strategy's neighbourhood. Of particular interest is a type of singular strategy that is an evolutionary attractor from a great distance, but once in its neighbourhood a population becomes dimorphic and undergoes disruptive selection leading to evolutionary branching. Modelling the adaptive growth and branching of the evolutionary tree can thus be considered as a major application of the framework. A haploid version of Levene's ‘soft selection’ model is developed as a specific example to demonstrate evolutionary dynamics and branching in monomorphic and polymorphic populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006554906681
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    Paper (German National Licenses)
    Fulltext
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