Fatigue crack growth analysis on square prismatic with embedded cracks under tension loading

M. S. Shaari, Ahmad Kamal Ariffin Mohd Ihsan, Akiyuki Takahashi, Shahrum Abdullah, Masanori Kikuchi, M. R.M. Akramin

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

One of the most important issues yet to be overcome by engineers is the integrity and reliability of engineering structures. This is to ensure the safety of the engineering structure is at the greatest since the catastrophic failures usually occur due to fatigue crack growth. Due to insufficient studies on the fatigue embedded crack growth, the prismatic bar is chosen as the model of the structure. It is wise to select the solid bar since the analysis can be much simpler, thus making it easier to examine the behaviour of the fatigue crack growth. In this study, the metallic square prismatic with embedded cracks is analysed using S-version Finite Element Modelling (S-version FEM) under tension loading. The S-version FEM is an open source program, that is built from codes previously compiled as a program. The S-version FEM structured using the global-local overlay technique consists of two separate global and local meshes. By using the basic concept from the energy release rate and stress intensity factors (SIF), the behaviour of the fatigue crack growth is analysed. From the linear elastic fracture mechanics concept, the SIF is calculated using the virtual crack closure-integral method. The influences of different initial crack size and aspect ratios on the fatigue crack growth are investigated in this study. In addition, the SIF results from the S-version FEM are compared with the analytical solutions. From the analysis, the root mean square errors (RMSE) are performed to support the validation. The RMSE shows a very small error of 0.227, 0.086 and 0.3089 according to the aspect ratio of 0.5, 1.0 and 2.0, respectively. The results also show significant characteristics and behaviour of the SIF trend along the crack front, corresponding to different aspect ratios. From this study, the S-version FEM is suitable to be used to predict the fatigue crack growth for the cracks embedded in a structure. Subsequently, the S-version FEM is an open source program can be modified for increasingly complex engineering problems.

Original languageEnglish
Pages (from-to)2511-2526
Number of pages16
JournalJournal of Mechanical Engineering and Sciences
Volume11
Issue number1
DOIs
Publication statusPublished - 1 Mar 2017

Fingerprint

Fatigue crack propagation
Stress intensity factors
Cracks
Aspect ratio
Mean square error
Crack closure
Energy release rate
Fracture mechanics
Crack propagation
Fatigue of materials
Engineers

Keywords

  • 3-D embedded cracks
  • Fatigue analysis
  • Fatigue crack growth rate
  • S-version FEM

ASJC Scopus subject areas

  • Computational Mechanics
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

Fatigue crack growth analysis on square prismatic with embedded cracks under tension loading. / Shaari, M. S.; Mohd Ihsan, Ahmad Kamal Ariffin; Takahashi, Akiyuki; Abdullah, Shahrum; Kikuchi, Masanori; Akramin, M. R.M.

In: Journal of Mechanical Engineering and Sciences, Vol. 11, No. 1, 01.03.2017, p. 2511-2526.

Research output: Contribution to journalArticle

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