Analysis of the Crack Growth Direction in Reinforced Composite Sheets Using Extended Finite Element Method

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Research areas:
Year:
2015
Type of Publication:
Article
Keywords:
Extended Finite Element Method, Reinforced Composite, Crack Growth Direction, Crack Position, Layers Angle
Authors:
Mehdi shahrabadi; Reza Madolit
Journal:
IJAIM
Volume:
3
Number:
4
Pages:
193-199
Month:
Jan.-Feb.
ISSN:
2320-5121
Abstract:
In this paper, the crack growth direction in a composite sheet is verified and in the following, the impact of some parameters such as initial crack place, initial crack angle and force amount change, on the crack growth direction and amount is discussed. Then, regarding the stress concentration value, the best reinforcement type is selected for the composite material. Standard, linear, three dimensional and eight-node brick continuous elements are utilized in the extended finite element method. Maximum tangential stress is considered as the criterion to identify the crack growth direction. XFEM is employed to analyze the crack growth and the methods used to analyze stress intensity coefficient, are LEFM and XFEM. The results are presented for 5 different cases, i.e. sheet without reinforcement, sheet with horizontal reinforcement, sheet with vertical reinforcement, sheet with oblique reinforcement and sheet with horizontal-vertical reinforcement. Moreover, the impact of layers position angle variation on the crack growth is studied.

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