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Modeling of Crack Propagation in Layered Structures Using Extended Finite Element Method

Credit to Download: 1 | Page Numbers 9 | Abstract Views: 252
Year: 2016
COI code: JR_CEJ-2-5_005
Paper Language: English

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Authors Modeling of Crack Propagation in Layered Structures Using Extended Finite Element Method

  Hesamoddin Nasaj Moghaddama - aM.Sc., Student, Department of Civil Engineering, Shahrood University of Technology, Shahrood, Iran.
  Ali Keyhanib - bAssistant Professor, Department of Civil Engineering, Shahrood University of Technology, Shahrood, Iran.
  Iman Aghayanc - cAssistant Professor, Department of Civil Engineering, Shahrood University of Technology, Shahrood, Iran.

Abstract:

Crack propagation in structures is an important issue which is engineers and designers should consider. Modeling crack propagation in structures and study the behavior of this phenomenon can give a better insight to engineers and designers for selecting the construction’s materials. Extended finite element method (XFEM) was used successfully in the past few years for simulating crack initiation and propagation in sophisticated and complex geometries in elastic fracture mechanics. In this paper, crack propagation in three-point bending beam including initial crack was modeled based on ABAQUS software. The following consequences were attained through the study of simulation data. First, the effects of young’s modulus and fracture energy on force-displacement curve at three-point bending beam were investigated. It was observed that, by increasing the value of young’s modulus and fracture energy, three-point bending beam was showed more load carrying against initiation. Second, in multi-layer beam, the effect of young’s modulus on force-displacement curve was investigated. In case I (the thin upper layer is harder than the substrate) the value of young’s modulus in substrate was kept constant and the amount of young’s modulus in thin layer was risen in each step rather than the substrate, the peak in force-displacement curve was ascended and three-point bending beam resisted better against crack initiation. Next, similar conditions was considered in case II (the thin upper layer is softer than the substrate), by decreasing the value of young’ modulus in top layer, peak in force-displacement curve was declined and crack initiation was happened in lower loading in each step. Finally, sensitivity analysis for thickness of top layer was conducted and the impact of this parameter was studied

Keywords:

Extended Finite Element Method (XFEM); Fracture; Three-Point Bending Beam; Crack Propagation

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COI code: JR_CEJ-2-5_005

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Nasaj Moghaddama, Hesamoddin; Ali Keyhanib & Iman Aghayanc, 2016, Modeling of Crack Propagation in Layered Structures Using Extended Finite Element Method, Civil Engineering Journal 2 (5), https://www.civilica.com/Paper-JR_CEJ-JR_CEJ-2-5_005.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Nasaj Moghaddama, Hesamoddin; Ali Keyhanib & Iman Aghayanc, 2016)
Second and more: (Nasaj Moghaddama; Keyhanib & Aghayanc, 2016)
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Type: state university
Paper No.: 7051
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