Cracking feature and mechanical behavior of shield tunnel lining simulated by a phase-field modeling method based on spectral decomposition
TLDR
In this article, a phase-field modeling method based on spectral decomposition is proposed to simulate the shield tunnel lining with mixed-mode cracks, which unifies the critical energy release rate and crack-driving strain energy.About:
This article is published in Tunnelling and Underground Space Technology.The article was published on 2022-01-01 and is currently open access. It has received 12 citations till now. The article focuses on the topics: Cracking & Joint (building).read more
Citations
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Large-scale testing of the mortise and tenon joint performance of the tunnel lining of prefabricated frame tunnels
TL;DR: In this article , a large-scale physical model test is used to study the mechanical properties of joints with bolts and without bolts under static loading, mainly considering the joint concrete and steel strain, opening amount, deflection, rotation angle, toughness, and ductility.
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Seismic fragility analysis of in-service shield tunnels considering surface building and joint-bolt corrosion
TL;DR: In this article , the authors assess the seismic fragility of shield tunnels in the transverse direction based on investigating seismic performance of segments and joints, accounting for the effects of the later-built surface structure and corrosion of joint bolts.
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Fluid-solid-phase multi-field coupling modeling method for hydraulic fracture of saturated brittle porous materials
TL;DR: In this article , a fluid-solid-phase multi-field coupling modeling method for hydraulic fracturing is proposed and implemented by a staggered algorithm in a commercial finite element software, where the hydraulic fracture evolution is controlled by a unified fracture phase-field method, and the fluid flow in the cracked domain is equivalent to a Darcy-type flow whose flow property is dependent on the crack width.
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An Analytical Solution for Steel Plate Strengthened Circular Tunnels with Various Interface Slip Modes
TL;DR: In this article , a simplified analytical solution for steel plate strengthened circular tunnel concrete linings is presented, considering various interface slip modes, from which explicit expressions for the stress and displacement fields throughout the system are obtained.
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Numerical Modeling of Quasi-Brittle Materials Using a Phase-Field Regularized Cohesive Zone Model with Optimal Softening Law
TL;DR: In this article , an approach combining optimal softening laws and a phase-field regularized cohesive zone model (PF-CZM) for modeling the fracture and damage properties of quasi-brittle materials accurately was proposed.
References
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A phase field model for rate-independent crack propagation: Robust algorithmic implementation based on operator splits
TL;DR: In this paper, a variational framework for rate-independent diffusive fracture was proposed based on the introduction of a local history field, which contains a maximum reference energy obtained in the deformation history, which may be considered as a measure for the maximum tensile strain obtained in history.
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Thermodynamically consistent phase‐field models of fracture: Variational principles and multi‐field FE implementations
TL;DR: In this article, a thermodynamically consistent framework for phase-field models of crack propagation in elastic solids, developed incremental variational principles and considering their numerical implementations by multi-field finite element methods is presented.
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2D and 3D Abaqus implementation of a robust staggered phase-field solution for modeling brittle fracture
Gergely Molnr,Anthony Gravouil +1 more
TL;DR: A two and three dimensional phase-field method in the commercial finite element code Abaqus/Standard based on the rate-independent variational principle of diffuse fracture that can simulate curvilinear fracture paths, branching and even crack coalescence is implemented.
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Unified tensile fracture criterion.
Zhefeng Zhang,Jürgen Eckert +1 more
TL;DR: An ellipse criterion is proposed as a new failure criterion to unify the four classical criteria above and apply it to exemplarily describe the tensile fracture behavior of BMGs as well as a variety of other materials.
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Abaqus implementation of phase-field model for brittle fracture
Mohammed A. Msekh,Mohammed A. Msekh,Juan Michael Sargado,M. Jamshidian,Pedro M. A. Areias,Timon Rabczuk,Timon Rabczuk +6 more
TL;DR: A phase-field model for brittle fracture is implemented in the commercial finite element software Abaqus by means of UEL and UMAT subroutines and removes the need for numerical tracking of discontinuities in the displacement field that are characteristic of discrete crack methods.