Zhang et al_JPhys_2021.pdf (2.38 MB)

A framework of modelling slip-controlled crack growth in polycrystals using crystal plasticity and XFEM

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conference contribution
posted on 17.05.2021, 08:22 by Ping Zhang, S Lu, Konstantinos Baxevanakis, Liguo Zhao, TY Yu, RX Zhou
Short cracks tend to develop at high and irregular rates compared to macroscopic cracks, making the prediction of fatigue life a challenging task. In this work, a numerical framework combining crystal plasticity model and the Extended Finite Element Method (XFEM) is applied to study the slip-controlled short crack growth in a polycrystal superalloy RR1000. The model is calibrated from experiments and used to evaluate short crack growth paths and rates. Two fracture criteria are used and compared: the onset of fracture is controlled by the total and individual cumulative shear strain respectively, and the crack grows either perpendicular to the direction of maximum principal strain or along crystallographic directions.

Funding

China Scholarship Council (CSC, No. 201806290092)

Dislocation-Microstructure Interaction at a Crack Tip - In Search of a Driving Force for Short Crack Growth

Engineering and Physical Sciences Research Council

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Oxidation Damage at a Crack Tip and Its Significance in Crack Growth under Fatigue-Oxidation Conditions

Engineering and Physical Sciences Research Council

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History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Journal of Physics: Conference Series

Volume

1885

Issue

3

Publisher

IOP Publishing

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by IOP Publishing under the Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/3.0/

Acceptance date

08/04/2021

Publication date

2021-04-28

Copyright date

2021

ISSN

1742-6588

eISSN

1742-6596

Language

en

Depositor

Dr Konstantinos Baxevanakis. Deposit date: 15 May 2021

Article number

042014