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Determination of crack growth direction for multiple offset edge cracks of a finite plate

An approximated crack growth direction and coalescence of the multiple cracks were obtained for an aluminum alloy plate by the finite element approach (FEA). Self-similar as well as non-self-similar crack growths were observed based on relative position of multiple cracks. | Nội dung Text Determination of crack growth direction for multiple offset edge cracks of a finite plate Engineering Solid Mechanics 2017 185-198 Contents lists available at GrowingScience Engineering Solid Mechanics homepage www.GrowingScience.com esm Determination of crack growth direction for multiple offset edge cracks of a finite plate P.K. Aroraa S C. Srivastavab and Harish Kumarc a Galgotias College of Engineering and Technology Greater Noida India b Birla Institute of Technology Mersa Ranchi India c CSIR National Physical Laboratory New Delhi India A R T I C L EI N F O ABSTRACT Article history An approximated crack growth direction and coalescence of the multiple cracks were obtained Received 6 January 2017 for an aluminum alloy plate by the finite element approach FEA . Self-similar as well as non- Accepted 20 May 2017 self-similar crack growths were observed based on relative position of multiple cracks. The FE Available online predictions of crack growth direction are validated with an experimental results and good 21 May 2017 Keywords agreement is established. Typical numerical results are presented to examine the effect of Crack initiation angle changing the crack tip distance S crack offset distance H on crack growth direction and Coalescence coalescence of a finite aluminum alloy aluminum plate. Based on the analysis and experimental Offset-crack results a new mathematical models for self-similar and non-self similar crack growth are Self-similar crack growth introduced. Non self-similar crack growth 2017 Growing Science Ltd. All rights reserved. Nomenclature a crack length E modulus of elasticity w width of Plate KI amp KII stress intensity factor for Mode-I amp h height of plate Mode-II θ crack initiation angle E modulus of elasticity t thickness of plate σy yield stress α crack inclination angle σu ultimate stress F applied load δ elongation μ Poisson s ratio εf failure strain S crack tip distance εep effective plastic strain H crack offset .