Viscous-elastic-plastic response of tunnels in squeezing ground conditions: Analytical modeling and experimental validation

2021 ◽  
Vol 146 ◽  
pp. 104888
Author(s):  
Ketan Arora ◽  
Marte Gutierrez
Keyword(s):  
Analytical Modeling ◽  
Experimental Validation ◽  
Plastic Response ◽  
Squeezing Ground ◽  
Elastic Plastic ◽  
Ground Conditions

scholarly journals Guided Formation of 3D Helical Mesostructures by Mechanical Buckling: Analytical Modeling and Experimental Validation

2016 ◽  
Vol 26 (17) ◽  
pp. 2909-2918 ◽  
Author(s):  
Yuan Liu ◽  
Zheng Yan ◽  
Qing Lin ◽  
Xuelin Guo ◽  
Mengdi Han ◽  
...  
Keyword(s):  
Analytical Modeling ◽  
Experimental Validation ◽  
Mechanical Buckling

scholarly journals Tunnel Squeezing Deformation Control and the Use of Yielding Elements in Shotcrete Linings: A Review

Materials ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 391
Author(s):  
Xiaomeng Zheng ◽  
Kui Wu ◽  
Zhushan Shao ◽  
Bo Yuan ◽  
Nannan Zhao
Keyword(s):  
High Resistance ◽  
Review Paper ◽  
State Of The Art ◽  
Squeezing Ground ◽  
Deformation Control ◽  
Development History ◽  
Ground Conditions ◽  
Supporting Effect ◽  
Mechanical Performances ◽  
Shotcrete Lining

Shotcrete lining shows high resistance but extremely low deformability. The utilization of yielding elements in shotcrete lining, which leads to the so-called ductile lining, provides a good solution to cope with tunnel squeezing deformations. Although ductile lining exhibits great advantages regarding tunnel squeezing deformation control, little information has been comprehensively and systematically available for its mechanism and design. This is a review paper for the purpose of summarizing the development history and discussing the state of the art of ductile lining. It begins by providing a brief introduction of ductile lining and an explanation of the importance of studying this issue. A following summary of supporting mechanism and benefits of ductile lining used in tunnels excavated in squeezing ground conditions is provided. Then, it summarizes the four main types of yielding elements applied in shotcrete lining and introduces their basic structures and mechanical performances. The influences of parameters of yielding elements on the supporting effect are discussed and the design methods for ductile lining are reviewed as well. Furthermore, recommendations for further research in ductile lining are proposed. Finally, a brief summary is presented.

scholarly journals An analytical modeling with experimental validation of bone temperature rise in drilling process

2020 ◽  
Vol 84 ◽  
pp. 151-160
Author(s):  
Foli Amewoui ◽  
Gaël Le Coz ◽  
Anne-Sophie Bonnet ◽  
Abdelhadi Moufki
Keyword(s):  
Temperature Rise ◽  
Analytical Modeling ◽  
Experimental Validation ◽  
Drilling Process

Elastoplastic Analysis of Layered Metal Matrix Composite Cylinders—Part I: Theory

1996 ◽  
Vol 118 (1) ◽  
pp. 13-20 ◽  
Author(s):  
R. S. Salzar ◽  
M.-J. Pindera ◽  
F. W. Barton
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Stiffness Matrix ◽  
Metal Matrix ◽  
Plastic Response ◽  
Solution Strategy ◽  
Composite Tubes ◽  
Elastic Plastic ◽  
Stiffness Matrices ◽  
Local Stiffness

An exact elastic-plastic analytical solution for an arbitrarily laminated metal matrix composite tube subjected to axisymmetric thermo-mechanical and torsional loading is presented. First, exact solutions for transversely isotropic and monoclinic (off-axis) elastoplastic cylindrical shells are developed which are then reformulated in terms of the interfacial displacements as the fundamental unknowns by constructing a local stiffness matrix for the shell. Assembly of the local stiffness matrices into a global stiffness matrix in a particular manner ensures satisfaction of interfacial traction and displacement continuity conditions, as well as the external boundary conditions. Due to the lack of a general macroscopic constitutive theory for the elastic-plastic response of unidirectional metal matrix composites, the micromechanics method of cells model is employed to calculate the effective elastic-plastic properties of the individual layers used in determining the elements of the local and thus global stiffness matrices. The resulting system of equations is then solved using Mendelson’s iterative method of successive elastic solutions developed for elastoplastic boundary-value problems. Part I of the paper outlines the aforementioned solution strategy. In Part II (Salzar et al., 1996) this solution strategy is first validated by comparison with available closed-form solutions as well as with results obtained using the finite-element approach. Subsequently, examples are presented that illustrate the utility of the developed solution methodology in predicting the elastic-plastic response of arbitrarily laminated metal matrix composite tubes. In particular, optimization of the response of composite tubes under internal pressure is considered through the use of functionally graded architectures.

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