Understanding the buckling and post-buckling behavior of rods confined in a finite space is of both scientific and engineering significance. Under uniaxial compression, an initially straight and slender rod confined in a tube may buckle into a sinusoidal shape and subsequently evolve into a complicated, three-dimensional (3D) helical shape. In this paper, we combine theoretical and numerical methods to investigate the post-buckling behavior of confined rods. Two theoretical models, which are based on the inextensible and extensible rod theories, respectively, are proposed to derive the analytical expressions for the axial compressive stiffness in the sinusoidal post-buckling stage. The former is concise in formulation and can be easily applied in engineering, while the latter works well in a broader scope of post-buckling analysis. Both methods can give a good approximation to the sinusoidal post-buckling stiffness and the former model is proved to be a zeroth-order approximation of the latter. The flexible multibody dynamics method based on the Timoshenko's geometrically exact beam theory is used to examine the accuracy of the two models. The methods presented in this work can be used in, for example, drilling engineering in oil and gas industries.
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July 2018
Research-Article
Post-Buckling Analysis of a Rod Confined in a Cylindrical Tube
Jia-Peng Liu,
Jia-Peng Liu
Department of Engineering Mechanics,
Tsinghua University,
Beijing 100084, China
Tsinghua University,
Beijing 100084, China
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Xiao-Yu Zhong,
Xiao-Yu Zhong
Department of Engineering Mechanics,
Tsinghua University,
Beijing 100084, China
Tsinghua University,
Beijing 100084, China
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Zai-Bin Cheng,
Zai-Bin Cheng
Drilling & Production Research Institute,
CNOOC Research Institute Ltd.,
Beijing 100028, China
CNOOC Research Institute Ltd.,
Beijing 100028, China
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Xi-Qiao Feng,
Xi-Qiao Feng
Department of Engineering Mechanics,
Tsinghua University,
Beijing 100084, China
e-mail: fengxq@tsinghua.edu.cn
Tsinghua University,
Beijing 100084, China
e-mail: fengxq@tsinghua.edu.cn
Search for other works by this author on:
Ge-Xue Ren
Ge-Xue Ren
Department of Engineering Mechanics,
Tsinghua University,
Beijing 100084, China
e-mail: rengx@tsinghua.edu.cn
Tsinghua University,
Beijing 100084, China
e-mail: rengx@tsinghua.edu.cn
Search for other works by this author on:
Jia-Peng Liu
Department of Engineering Mechanics,
Tsinghua University,
Beijing 100084, China
Tsinghua University,
Beijing 100084, China
Xiao-Yu Zhong
Department of Engineering Mechanics,
Tsinghua University,
Beijing 100084, China
Tsinghua University,
Beijing 100084, China
Zai-Bin Cheng
Drilling & Production Research Institute,
CNOOC Research Institute Ltd.,
Beijing 100028, China
CNOOC Research Institute Ltd.,
Beijing 100028, China
Xi-Qiao Feng
Department of Engineering Mechanics,
Tsinghua University,
Beijing 100084, China
e-mail: fengxq@tsinghua.edu.cn
Tsinghua University,
Beijing 100084, China
e-mail: fengxq@tsinghua.edu.cn
Ge-Xue Ren
Department of Engineering Mechanics,
Tsinghua University,
Beijing 100084, China
e-mail: rengx@tsinghua.edu.cn
Tsinghua University,
Beijing 100084, China
e-mail: rengx@tsinghua.edu.cn
1Corresponding authors.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received February 11, 2018; final manuscript received March 13, 2018; published online April 12, 2018. Assoc. Editor: Pedro Reis.
J. Appl. Mech. Jul 2018, 85(7): 071001 (11 pages)
Published Online: April 12, 2018
Article history
Received:
February 11, 2018
Revised:
March 13, 2018
Citation
Liu, J., Zhong, X., Cheng, Z., Feng, X., and Ren, G. (April 12, 2018). "Post-Buckling Analysis of a Rod Confined in a Cylindrical Tube." ASME. J. Appl. Mech. July 2018; 85(7): 071001. https://doi.org/10.1115/1.4039622
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