Peridynamics for predicting pit-to-crack transition

De Meo, Dennj and Russo, Luigi and Oterkus, Erkan and Gunasegaram, Dayalan and Cole, Ivan; (2017) Peridynamics for predicting pit-to-crack transition. In: 58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. AIAA SciTech Forum . American Institute of Aeronautics and Astronautics Inc., USA. ISBN 9781624104535 (https://doi.org/10.2514/6.2017-0568)

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Abstract

Even though the failure mechanisms in aerospace structures are mainly governed by the incidence of fatigue loading, environmentally assisted fracture related pit-to-crack transition can still occur in many aluminum alloys, stainless steels and high strength low alloy steels. Despite of the relative rarity of this phenomenon, the consequent failures can be extremely destructive and lead to the loss of an aircraft. Prediction of damage evolution starting at corrosion pits acting as precursor to cracking has been hampered by a lack of insight into the process, as well as limitations in visualization and measurement techniques. In this regard, numerical modeling can be beneficial. The current study presents numerical predictions of pit evolution from a flat metal surface to realistic pit morphologies by using a new continuum mechanics formulation, peridynamics. Intergranular/transgranular pit-tocrack transition under different loading conditions and microstructural features are investigated without imposing any limiting assumption on the site of the crack initiation. Based on the numerical results, it can be concluded that microstructure has a significant effect for the prediction of pit-to-crack transition phenomenon.

ORCID iDs

De Meo, Dennj ORCID logoORCID: https://orcid.org/0000-0002-3489-0596, Russo, Luigi ORCID logoORCID: https://orcid.org/0000-0001-6025-1213, Oterkus, Erkan ORCID logoORCID: https://orcid.org/0000-0002-4614-7214, Gunasegaram, Dayalan and Cole, Ivan;
  • Item type:Book Section
    ID code:60791
    Dates:
    Date
    Event
    9 January 2017
    Published
    6 December 2016
    Accepted
    Notes:©2017 AIAA De Meo, D., Russo, L., Oterkus, E., Gunasegaram, D., & Cole, I. (2017). Peridynamics for predicting pit-to-crack transition. In 58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. [AIAA 2017-0568] (AIAA SciTech Forum). Reston, VA: American Institute of Aeronautics and Astronautics Inc.. DOI: 10.2514/6.2017-0568
    Subjects:Technology > Motor vehicles. Aeronautics. Astronautics
    Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
    Depositing user: Pure Administrator
    Date deposited:26 May 2017 15:57
    Last modified:11 Nov 2024 15:10
    URI:https://strathprints.strath.ac.uk/id/eprint/60791
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