Predictive Modelling of Creep Crack Initiation and Growth using Extended Finite Element Method (XFEM)

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Published Jun 19, 2022
DOI https://doi.org/10.3221/IGF-ESIS.61.08

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Meor Iqram Meor Ahmad
Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
Mohd Anas Mohd Sabri
Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
Mohd Faizal Mat Tahir
Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
Nur Azam Abdullah
Structural Mechanics and Dynamics Research Group, Department of Mechanical Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia

Abstract

In this study, a numerical strategy for predictive modelling of creep in tension tests for the rectangular plate with a single crack and CT-specimen based on the extended finite element method (XFEM) will be described in detail. A model of creep fracture initiation and creep crack growth (CCG) is developed, while the XFEM is employed to spots located inside the finite element for the purpose of predicting crack potential and propagation. In order to characterize the creep fracture initiation, identification of C(t)-integral formula is conducted. In addition, XFEM and analytical solutions are also analyzed to look at the connection of C(t)-integral with time for a rectangular plate with a single crack under plane stress conditions. An illustration showing the se-quence of stress distribution and displacement contour plots are also being presented. The stresses and displacements spread throughout the crack path have also been determined using CT-specimens. In addition, the creep cracks growth length with normalized time and the creep crack growth rate with the C(t)-integral are predicted to be related, indicating that the numerical results are in good accord with the experimental results.

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    Issue
    Vol. 16 No. 61 (2022): July 2022
    Section
    SI: Failure Analysis of Materials and Structures

    How to Cite

    Meor Ahmad, M. I. ., Mohd Sabri, M. A. ., Mat Tahir, M. F. and Abdullah, N. A. (2022) “Predictive Modelling of Creep Crack Initiation and Growth using Extended Finite Element Method (XFEM)”, Frattura ed Integrità Strutturale, 16(61), pp. 119–129. doi: 10.3221/IGF-ESIS.61.08.
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