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Structural and Multidisciplinary Optimization

, Volume 51, Issue 3, pp 585–598 | Cite as

Adjoint design sensitivity analysis of dynamic crack propagation using peridynamic theory

  • Min-Yeong Moon
  • Jae-Hyun Kim
  • Youn Doh Ha
  • Seonho ChoEmail author
RESEARCH PAPER

Abstract

Based on the peridynamics of the reformulated continuum theory, an adjoint design sensitivity analysis (DSA) method is developed for the solution of dynamic crack propagation problems using the explicit scheme of time integration. Non-shape DSA problems are considered for the dynamic crack propagation including the successive branching of cracks. The adjoint variable method is generally suitable for path-independent problems but employed in this bond-based peridynamics since its path is readily available. Since both original and adjoint systems possess time-reversal symmetry, the trajectories of systems are symmetric about the u-axis. We take advantage of the time-reversal symmetry for the efficient and concurrent computation of original and adjoint systems. Also, to improve the numerical efficiency of large scale problems, a parallel computation scheme is employed using a binary space decomposition method. The accuracy of analytical design sensitivity is verified by comparing it with the finite difference one. The finite difference method is susceptible to the amount of design perturbations and could result in inaccurate design sensitivity for highly nonlinear peridynamics problems with respect to the design. It is demonstrated that the peridynamic adjoint sensitivity involving history-dependent variables can be accurate only if the path of the adjoint response analysis is identical to that of the original response.

Keywords

Peridynamic theory Dynamic crack propagation Adjoint variable method Design sensitivity analysis Path dependent problem Parallel computation 

Notes

Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2010-0018282). The support is gratefully acknowledged. The authors would also like to thank Ms. Inyoung Cho at Korea University for editing assistance.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Min-Yeong Moon
    • 1
  • Jae-Hyun Kim
    • 2
  • Youn Doh Ha
    • 3
  • Seonho Cho
    • 2
    Email author
  1. 1.Department of Mechanical and Industrial EngineeringUniversity of IowaIowa CityUSA
  2. 2.Seoul National UniversitySeoulRepublic of Korea
  3. 3.Kunsan National UniversityKunsanRepublic of Korea

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