Bounds on the Effect of Progressive Structural Degradation

  • Bendsøe, Martin P. (Project Manager)
  • Achtziger, W. (Project Participant)
  • Taylor, John E. (Project Participant)

    Project Details

    Description

    In classical, phenomenological models for damage in elastic materials it is assumed that damage results in reduced stiffness of the material. Normally a linear interpolation is applied and the damage propagation is found as the distribution of damage maximizing the global stiffness reduction. The linear interpolation induces technical difficulties in continuum models, since one will typically not have existence of the solution in an ordinary sense. The project has considered alternative interpolations and it has been found that linear interpolation of the inverse stiffness provides a physically realistic and well posed model. Moreover, it is possible to establish highly efficient numerical algorithms, which in complexity are comparable to algorithms for solving classical problems in elasto plasicity.
    Keywords: Damage models, convex analysis.
    StatusFinished
    Effective start/end date01/01/199601/06/1998