The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform

Hideto Momii - One of the best experts on this subject based on the ideXlab platform.

  • Ductile Damage evolution law for proportional and non-proportional loading conditions
    Gruppo Italiano Frattura, 2019
    Co-Authors: Riccardo Fincato, Seiichiro Tsutsumi, Hideto Momii
    Abstract:

    The characterization of ductile Damage evolution, and its description, have been the object of extensive research in the Continuum Damage Mechanic field. Many different models have been developed since the pioneering works carried out a few decades ago. In detail, the stress triaxiality and the Lode angle parameters have been identified as the two main variables that affect the material ductility. The literature offers a great number of investigations under monotonic loading conditions, however, a proper characterization of the Damage evolution under cyclic loading or nonproportional loading is still missing. In this paper, an unconventional coupled elastoplastic and Damage constitutive model with a Mohr-Coulomb failure criterion is presented. The novelty of this study is represented by the modification of the ductile Damage law in order to consider the Damage evolution under non-proportional loading conditions. Therefore, the idea is to investigate the structural response of a steel bridge column subjected to a cyclic non-proportional loading, showing how, a different approach in the description of the ductile Damage evolution, is necessary for a realistic description of the pier behaviou

  • Ductile Damage evolution under cyclic non-proportional loading paths
    Procedia Structural Integrity, 2018
    Co-Authors: Riccardo Fincato, Seiichiro Tsutsumi, Hideto Momii
    Abstract:

    Abstract The characterization of ductile Damage evolution, and its description, have been the object of extensive research in the Continuum Damage Mechanic field. Starting from the pioneering works of Lemaitre (1985), Gurson (1977), Rousselier (1987), many different models have been developed. In detail, the stress triaxiality and the Lode angle parameters have been identified as the two main variables that affect the material ductility. The literature offers a great number of investigations under monotonic loading conditions, however, a proper characterization of the Damage evolution under cyclic loading or non-proportional loading is still missing. In this paper, an unconventional coupled elastoplastic and Damage constitutive model with a Mohr-Coulomb failure criterion (Bai and Wierzbicki, 2010) is presented. The ductile Damage evolution law is modified in order to consider the Damage evolution under non-proportional loading conditions. The idea is to compare the Damage evolution of a steel bridge column subjected to three different non-proportional loading paths in order to identify the loading condition that compromise the structural integrity.

Riccardo Fincato - One of the best experts on this subject based on the ideXlab platform.

  • Ductile Damage evolution law for proportional and non-proportional loading conditions
    Gruppo Italiano Frattura, 2019
    Co-Authors: Riccardo Fincato, Seiichiro Tsutsumi, Hideto Momii
    Abstract:

    The characterization of ductile Damage evolution, and its description, have been the object of extensive research in the Continuum Damage Mechanic field. Many different models have been developed since the pioneering works carried out a few decades ago. In detail, the stress triaxiality and the Lode angle parameters have been identified as the two main variables that affect the material ductility. The literature offers a great number of investigations under monotonic loading conditions, however, a proper characterization of the Damage evolution under cyclic loading or nonproportional loading is still missing. In this paper, an unconventional coupled elastoplastic and Damage constitutive model with a Mohr-Coulomb failure criterion is presented. The novelty of this study is represented by the modification of the ductile Damage law in order to consider the Damage evolution under non-proportional loading conditions. Therefore, the idea is to investigate the structural response of a steel bridge column subjected to a cyclic non-proportional loading, showing how, a different approach in the description of the ductile Damage evolution, is necessary for a realistic description of the pier behaviou

  • Ductile Damage evolution under cyclic non-proportional loading paths
    Procedia Structural Integrity, 2018
    Co-Authors: Riccardo Fincato, Seiichiro Tsutsumi, Hideto Momii
    Abstract:

    Abstract The characterization of ductile Damage evolution, and its description, have been the object of extensive research in the Continuum Damage Mechanic field. Starting from the pioneering works of Lemaitre (1985), Gurson (1977), Rousselier (1987), many different models have been developed. In detail, the stress triaxiality and the Lode angle parameters have been identified as the two main variables that affect the material ductility. The literature offers a great number of investigations under monotonic loading conditions, however, a proper characterization of the Damage evolution under cyclic loading or non-proportional loading is still missing. In this paper, an unconventional coupled elastoplastic and Damage constitutive model with a Mohr-Coulomb failure criterion (Bai and Wierzbicki, 2010) is presented. The ductile Damage evolution law is modified in order to consider the Damage evolution under non-proportional loading conditions. The idea is to compare the Damage evolution of a steel bridge column subjected to three different non-proportional loading paths in order to identify the loading condition that compromise the structural integrity.

Seiichiro Tsutsumi - One of the best experts on this subject based on the ideXlab platform.

  • Ductile Damage evolution law for proportional and non-proportional loading conditions
    Gruppo Italiano Frattura, 2019
    Co-Authors: Riccardo Fincato, Seiichiro Tsutsumi, Hideto Momii
    Abstract:

    The characterization of ductile Damage evolution, and its description, have been the object of extensive research in the Continuum Damage Mechanic field. Many different models have been developed since the pioneering works carried out a few decades ago. In detail, the stress triaxiality and the Lode angle parameters have been identified as the two main variables that affect the material ductility. The literature offers a great number of investigations under monotonic loading conditions, however, a proper characterization of the Damage evolution under cyclic loading or nonproportional loading is still missing. In this paper, an unconventional coupled elastoplastic and Damage constitutive model with a Mohr-Coulomb failure criterion is presented. The novelty of this study is represented by the modification of the ductile Damage law in order to consider the Damage evolution under non-proportional loading conditions. Therefore, the idea is to investigate the structural response of a steel bridge column subjected to a cyclic non-proportional loading, showing how, a different approach in the description of the ductile Damage evolution, is necessary for a realistic description of the pier behaviou

  • Ductile Damage evolution under cyclic non-proportional loading paths
    Procedia Structural Integrity, 2018
    Co-Authors: Riccardo Fincato, Seiichiro Tsutsumi, Hideto Momii
    Abstract:

    Abstract The characterization of ductile Damage evolution, and its description, have been the object of extensive research in the Continuum Damage Mechanic field. Starting from the pioneering works of Lemaitre (1985), Gurson (1977), Rousselier (1987), many different models have been developed. In detail, the stress triaxiality and the Lode angle parameters have been identified as the two main variables that affect the material ductility. The literature offers a great number of investigations under monotonic loading conditions, however, a proper characterization of the Damage evolution under cyclic loading or non-proportional loading is still missing. In this paper, an unconventional coupled elastoplastic and Damage constitutive model with a Mohr-Coulomb failure criterion (Bai and Wierzbicki, 2010) is presented. The ductile Damage evolution law is modified in order to consider the Damage evolution under non-proportional loading conditions. The idea is to compare the Damage evolution of a steel bridge column subjected to three different non-proportional loading paths in order to identify the loading condition that compromise the structural integrity.

Danial Ghodsiyeh - One of the best experts on this subject based on the ideXlab platform.

  • prediction of rupture in gas forming process using Continuum Damage Mechanic
    Advanced Materials Research, 2012
    Co-Authors: M Rahafrooz, M Sanjari, Mehran Moradi, Danial Ghodsiyeh
    Abstract:

    The Continuum Damage Mechanics is a branch of applied Mechanics that used to predict the initiation of cracks in metal forming process. In this article, Damage definition and ductile Damage model are explained, and also ductile Damage model is applied to predict initiation of fracture in gas metal forming process with ABAQUS/EXPLICIT simulation. In this method instead of punch, the force is applied by air pressure. In this study, first the ductile Damage criterion and its relations are taken into account and, subsequently, the process of gas-aid formation process is put into consideration and ductile Damage model for prediction of rupture area is simulated using ABAQUS simulation software. Eventually, the process of formation via gas on the aluminum with total thickness of 0.24 [mm] was experimentally investigated and the results acquired from experiment were compared with relating simulations. The effect of various parameters such as radius of edge matrix, gas pressure and blank temperature has been evaluated. Simulation was compared with experimental results and good agreement was observed.

Ramesh Talreja - One of the best experts on this subject based on the ideXlab platform.

  • a synergistic Damage Mechanics approach to Mechanical response of composite laminates with ply cracks
    Journal of Composite Materials, 2013
    Co-Authors: Chandra Veer Singh, Ramesh Talreja
    Abstract:

    We treat selected test cases in the third world wide failure exercise by the approach described as synergistic Damage Mechanics. This approach utilizes microMechanics and Continuum Damage Mechanics to predict the overall Mechanical response of composite laminates with ply cracking in multiple orientations. The material constants needed in the Continuum Damage Mechanic formulation are calculated from stiffness property changes incurred in a reference laminate. For other laminate configurations, the stiffness changes are derived using a relative constraint parameter which is calculated from the constraint on the opening displacement of ply cracks within the given cracked laminate evaluated numerically by a finite element analysis of appropriately constructed representative unit cell. The number density of ply cracks (cracks per unit length normal to the crack planes) under quasi-static loading is calculated by an energy-based approach. Finally, the stress–strain response of a laminate is determined by combi...