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Article by Zhou H
Article by Liu B
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Article by Li C
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Simulation analysis of strength of aluminum alloy drilling pipe
ZHOU Hai-long1,2, LIU Bao-chang1,2, WANG Su1,2, LI Chuang1,2
1. College of Construction Engineering, Jilin University, Changchun 130026, China;
2. Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Land and Resources, Changchun 130026, China
Abstract: Compared with the traditional steel drilling pipe, aluminum alloy drilling pipe is characterized by small density, high specific strength and no magnetism, so it has a great advantage in drilling operation. The tough underground working environment, such as the collision with the borehole wall, will lead to the deformation of the drilling pipe and reduce its strength. In this paper, Ansys LS-DYNA and Workbench were used to simulate the deformation state of the ��147 mm aluminum alloy drilling pipe after the collision with the borehole wall, and the strength after the cracks were generated was also analyzed. The results show that when the �� 147 mm aluminum alloy pipe is being used, the main section of drilling pipe is relatively weak and undergoes plastic deformation when colliding with borehole wall at a speed of 2 m/s, which reduces the performance of the aluminum alloy pipe. When the crack length of the main part of the drilling pipe is greater than 1 mm, the crack propagation will occur under the load, resulting in the fracturing of the drilling pipe. When the main body of the drilling pipe has a crack, under fatigue load, it can only bear one fifth of the load of the non-cracking drilling pipe.
Keywords: plastic deformation   Ansys LS-DYNA   crack   Workbench   fatigue load  
�ո����� 2017-06-09 �޻����� 2017-07-11 ����淢������  
DOI: 10.3969/j.issn.1004-5589.2017.03.036
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