A statistical volume element based approach to multiscale modeling of fatigue crack formation in AA 2024-T351

Jinjun Zhang, Kuang Liu, Aditi Chattopadhyay

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The objective of this paper is to develop an energy- and slip-based multiscale damage criterion to study the formation of fatigue cracks in crystalline metallic aerospace structural components. The formation of the initial crack can be decomposed into two stages: nucleation of micro cracks and coalescence of micro cracks into a major crack. In the first stage, a crack extends from within intermetallic particles into a surrounding grain of the alloy. Fatigue damage increments in four dependent slip planes are calculated and then measured to nucleate micro cracks. In the second stage, the micro cracks are seen to grow and coalesce, leading to the formation of a major crack. A novel meso-statistical volume element model is constructed to implement the simulation and improve computational efficiency compared to traditional representative volume element models. Fatigue tests of lug joint samples are performed to validate this multiscale damage criterion. The crack growing rate and direction show a good correlation between experimental data and simulation results.

Original languageEnglish (US)
Title of host publication53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012
StatePublished - Dec 1 2012
Event53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012 - Honolulu, HI, United States
Duration: Apr 23 2012Apr 26 2012

Publication series

Name53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012

Other

Other53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012
CountryUnited States
CityHonolulu, HI
Period4/23/124/26/12

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ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering
  • Materials Science(all)
  • Surfaces and Interfaces

Cite this

Zhang, J., Liu, K., & Chattopadhyay, A. (2012). A statistical volume element based approach to multiscale modeling of fatigue crack formation in AA 2024-T351. In 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012 (53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012).