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Nonlinear Dynamical Effects and Observations in Modeling and Simulating Damage Evolution in a Cantilevered Beam

Auteur(s):


Médium: article de revue
Langue(s): anglais
Publié dans: Structural Health Monitoring, , n. 3, v. 4
Page(s): 259-282
DOI: 10.1177/1475921705055250
Abstrait:

This study investigates the nonlinear dynamic failure characteristics of a notched cantilever beam using numerical finite element models and experiments with various displacement loads at the root of the beam. Damage states of the beam are represented as quasi-static equilibrium points and, subsequently, all significant damage events are modeled as bifurcations (qualitative changes) in the set of stable equilibria for the structure-damage system using a set of low-order normal forms. When analytical models are used to interpret trends in data from the beam as it undergoes different routes to failure, the state-space relationship between estimated crack length and rate of change of crack length exhibits elastic-plastic transitions, which depend on the effects of damage accumulation and the load history. It is suggested that these transitions could be used as a series of milestones for rendering a prognosis. It is demonstrated that nonlinear normal forms do simulate a variety of damage evolution phenomena using a few key parameters, which must be evaluated in future works.

Structurae ne peut pas vous offrir cette publication en texte intégral pour l'instant. Le texte intégral est accessible chez l'éditeur. DOI: 10.1177/1475921705055250.
  • Informations
    sur cette fiche
  • Reference-ID
    10561515
  • Publié(e) le:
    11.02.2021
  • Modifié(e) le:
    26.02.2021
 
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