Exploració per tema "Brittleness--Mathematical models"
Ara es mostren els items 1-16 de 16
-
A robust and efficient 3D constitutive law to describe the response of quasi-brittle materials subjected to reverse cyclic loading: formulation, identification and application to a RC shear wall
(CIMNE, 2015)
Comunicació de congrés
Accés obertIn this paper, a new constitutive law aiming at describing the quasi-brittle behavior when subjected to cyclic loading is presented.The proposed model is formulated with in the frame work of isotròpic contínuum damage ... -
An isotropic damage model for geomaterials in the Kratos framework
(Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2015)
Llibre
Accés obertProgressive fracture in quasi-brittle materials such as concrete, rocks, soils, is often treated as strain softening in continuum damage mechanics. Such constitutive relations favour spurious strain localization and ... -
Application of configurational mechanics to crack propagation in quasi-brittle materials
(2021-01)
Article
Accés obertThe paper describes a numerical approach to represent cracking along non-pre-established directions, in 2-D structures or domains of quasi-brittle materials such as concrete or rock. The approach is developed on the basis ... -
Appraisement of planar, bending and twisting cracks in 3D with isotropic and orthotropic damage models
(Springer, 2018-03)
Article
Accés obertThis paper discusses the modeling of cracking in quasi-brittle materials using isotropic and orthotropic damage constitutive laws. A mixed strain/displacement finite element formulation is used, taking advantage of its ... -
Combination of a non-local damage model for quasi-brittle materials with a mesh-adaptive finite element technique
(2016-05)
Article
Accés obertProgressive fracture in quasi-brittle materials is often treated via strain softening models in continuum damage mechanics. Such constitutive relations favour spurious strain localization and ill-posedness of boundary value ... -
Concurrent multiscale analysis of heterogeneous materials
(Vienna University of Technology, 2012)
Text en actes de congrés
Accés restringit per política de l'editorialConcurrent multiscale analysis of quasi-brittle heterogeneous materials such as concrete and rock is conducted employing non-overlapping domain decomposition techniques. Initially, a coarse discretization with effective ... -
Domain decomposition and parallel direct solvers as an adaptive multiscale strategy for damage simulation in materials
(Springer, 2016)
Text en actes de congrés
Accés restringit per política de l'editorialUnderstanding physical phenomena of heterogeneous materials is an ongoing active research field in the structural design of buildings and roads. The failure analysis of quasi-brittle materials such as concrete is a particular ... -
Finite element modeling of quasi-brittle cracks in 2D and 3D with enhanced strain accuracy
(2017-11)
Article
Accés obertThis paper discusses the finite element modeling of cracking in quasi-brittle materials. The problem is addressed via a mixed strain/displacement finite element formulation and an isotropic damage constitutive model. The ... -
Implementation and assessment of a two-scale computational framework for softening materials
(2006)
Report de recerca
Accés obertThe objective of this report is to introduce, implement and assess a two-scale FE technique for the mechanical study of heterogeneous quasi-brittle materials. Although the field of multi-scale analysis of structures is ... -
Multiscale analysis of heterogeneous brittle materials using domain decomposition techniques
(2010)
Text en actes de congrés
Accés restringit per política de l'editorialIn this contribution we present a multiscale framework for the analysis of brittle materials based on domain decomposition approaches. In particular, the FETI (Finite Element Tearing and Interconnecting) [1] method is ... -
Objectivity in quasi-brittle structural failure via adaptive formulation and mesh refinement
(2022-12)
Article
Accés restringit per política de l'editorialIn this work, the combined implementation of Adaptive Formulation Refinement (AFR) and Adaptive Mesh Refinement (AMR) strategies is proposed for the efficient and mesh objective evaluation of quasi-brittle fracture. A ... -
On micro-to-macro connections in strong coupling multiscale modeling of softening materials
(Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2011)
Text en actes de congrés
Accés obertIn this contribution we describe a methodology for the multiscale analysis of heterogeneous quasi-brittle materials. The algorithm is based on the finite element tearing and interconnecting FETI [1] method cast in a ... -
Reduced kinematic formulation based on the strong discontinuity method for reinforced concrete components
(CIMNE, 2015)
Text en actes de congrés
Accés obertDamage models, developed in the last decades, insure a continuous description of the fracture process zone in quasi-brittle materials but fail at representing fine information of the cracking features such as openings and ... -
Simplified qualitative discrete numerical model to determine cracking pattern in brittle materials by means of finite element method
(2017)
Article
Accés obertThis paper presents the formulation, implementation, and validation of a simplified qualitative model to determine the crack path of solids considering static loads, infinitesimal strain, and plane stress condition. This ... -
Structural size effect: experimental, theoretical and accurate computational assessment
(Elsevier, 2020-06)
Article
Accés obertIn this paper, experimental evidence, theoretical predictions and the finite element modelling of the structural size effect in cracking problems of quasi-brittle materials are discussed and assessed against each other. ... -
The role of domain decomposition techniques for the study of heterogeneous quasi-brittle materials
(CRC Press, 2010)
Text en actes de congrés
Accés restringit per política de l'editorialWe focus on the analysis of fracture in quasi-brittle materials by exploiting the potential of domain decomposition techniques. More specifically, we restrict our attention to the FETI (Finite Element Tearing and ...