Cohesive crack model for mixed mode fracture of brick masonry

Reyes, E.; Casati, M. J.; Gálvez, Jaime C.

doi:10.1007/s10704-008-9243-1

Cited by 22 publications

(25 citation statements)

References 40 publications

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“…To check the model with an anisotropic material, the experimental data published by Reyes et al [58,59] were numerically simulated. This is a series of mixed mode fracture performed on small masonry panels (a scale factor of 1 configuration with non-symmetric loading.…”

Section: Comparison With the Experiments By Reyes Et Almentioning

confidence: 99%

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An embedded cohesive crack model for finite element analysis of quasi-brittle materials

Gálvez

Planãs

Sancho

et al. 2013

Engineering Fracture Mechanics

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This paper presents a numerical implementation of the cohesive crack model for the anal-ysis of quasibrittle materials based on the strong discontinuity approach in the framework of the finite element method. A simple central force model is used for the stress versus crack opening curve. The additional degrees of freedom defining the crack opening are determined at the crack level, thus avoiding the need for performing a static condensation at the element level. The need for a tracking algorithm is avoided by using a consistent procedure for the selection of the separated nodes. Such a model is then implemented into a commercial program by means of a user subroutine, consequently being contrasted with the experimental results. The model takes into account the anisotropy of the material. Numerical simulations of well-known experiments are presented to show the ability of the proposed model to simulate the fracture of quasibrittle materials such as mortar, con-crete and masonry.

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Section: Comparison With the Experiments By Reyes Et Almentioning

confidence: 99%

“…18. Testing arrangement, geometry, dimensions, boundary conditions and instrumentation of the tests of Reyes et al [58,59]. Table 2 Mechanical properties of brick masonry under mode I fracture [58,59].…”

Section: Final Remarks and Conclusionmentioning

confidence: 99%

An embedded cohesive crack model for finite element analysis of quasi-brittle materials

Gálvez

Planãs

Sancho

et al. 2013

Engineering Fracture Mechanics

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“…The cohesive crack model, proposed by Hillerborg (25) for concrete and mortar, has been successful in the analysis of the fracture of masonry (10)(11)(12).…”

Section: Cohesive Fracture Modelmentioning

confidence: 99%

“…Hasta ahora el estudio de los mecanismos de fallo de la fábrica se ha centrado fundamentalmente en las solicitaciones de compresión y compresión/cortante (3-7), habiéndose estudiado poco el fallo bajo solicitaciones de tracción y cortante (8)(9)(10)(11)(12)(13). El trabajo (1) proporciona resultados experimentales de fractura en modo mixto de probetas de fábrica de dimensiones reducidas.…”

Section: Introductionunclassified

“…Until now, the study of brick masonry failure has been focussed on compression and compression/shear failure mechanisms (3)(4)(5)(6)(7), and practically nothing (based on the fracture mechanics approach), to tensile/shear failure (8)(9)(10)(11)(12)(13). Reference (1) supplies experimental results of mixed mode fracture tests with brickwork scaled specimens.…”

Section: Introductionmentioning

confidence: 99%

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Estudio de la fisuración de la fábrica de ladrillo con un modelo de fisura cohesiva

Reyes¹,

Casati²,

Gálvez³

2010

Mater. construcc.

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RESUMENEste artículo presenta un modelo de cálculo que permite simular el comportamiento en rotura de la fábrica de ladrillo bajo solicitaciones de tracción y cortante. El modelo extiende el modelo cohesivo formulado por los autores para hormigón, considerando la anisotropía del material. El procedimiento de cálculo consta de dos fases: 1) obtención de la trayectoria de grieta mediante un cálculo elástico lineal; 2) incorporación del modelo cohesivo en la misma mediante elementos de intercara. El modelo se ha implementado en un programa de elementos finitos comercial con una subrutina de usuario y se ha contrastado con los resultados experimentales de los ensayos a escala. Las propiedades mecánicas de la fábrica, en especial las de fractura, se miden con ensayos de caracterización en dos direcciones. Éstas se incorporan al modelo de cálculo para simular los ensayos de fractura en modo mixto, prediciendo los resultados adecuadamente para distintas orientaciones de los tendeles.Palabras clave: ladrillo, fisuración, resistencia a tracción, resistencia a cortante, simulación numérica. SUMMARYThis paper presents a numerical procedure to simulate the cracking process of the brickwork masonry under tensile/shear loading. The model is an extension of the cohesive model developed by the authors for concrete, and takes into account the anisotropy of the material. The numerical procedure includes two steps: 1) calculation of the crack path with a linear elastic fracture model; 2) after the crack path is obtained, an interface finite element (using the cohesive fracture model) is incorporated into the trajectory. Such a model is then implemented into a commercial code by means of a user subroutine, consequently being contrasted with experimental results. Fracture properties of masonry are independently measured for two directions on the composed masonry, and then input in the numerical model. This numerical procedure accurately predicts the experimental mixed mode fracture records for different orientations of the brick layers on masonry panels.

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An embedded formulation with conforming finite elements to capture strong discontinuities

Dias-da-Costa

Alfaiate²,

Sluys

et al. 2012

Numerical Meth Engineering

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SUMMARY The embedding of discontinuities into finite elements has become a powerful technique for the simulation of fracture in a wide variety of mechanical problems. However, existing formulations still use non‐conforming finite elements. In this manuscript, a new conforming formulation is proposed. The main properties of this formulation are as follows: (i) variational consistency; (ii) no limitations on the choice of the parent finite element; (iii) comprehensive kinematics of the discontinuity, including both rigid body motion and stretching; (iv) fully compatible enhanced kinematic field; (v) additional global DOFs located at the discontinuity; (vi) continuity of both jumps and tractions across element boundaries; and (vii) stress locking free. The performance of the proposed formulation is tested by means of academic and structural examples. The numerical results are compared with available experimental results and other numerical approaches, namely the generalized strong discontinuity approach and the generalized FEM/Extended FEM. Copyright © 2012 John Wiley & Sons, Ltd.

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Cohesive crack model for mixed mode fracture of brick masonry

Cited by 22 publications

References 40 publications

An embedded cohesive crack model for finite element analysis of quasi-brittle materials

An embedded cohesive crack model for finite element analysis of quasi-brittle materials

Estudio de la fisuración de la fábrica de ladrillo con un modelo de fisura cohesiva

An embedded formulation with conforming finite elements to capture strong discontinuities

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