The Experts below are selected from a list of 1941 Experts worldwide ranked by ideXlab platform

Christian Berggreen - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Initial Debond Crack Location on the Face/core Debond Fracture Toughness
    EPJ Web of Conferences, 2010
    Co-Authors: A. Quispitupa Yupa, Christian Berggreen
    Abstract:

    This paper studies the effect of initial Crack location on the face/core debond fracture toughness under different mixed mode loading conditions. The mixed mode loading at the Crack tip is defined in terms of the mode-mixity. In order to achieve the desired initial debond Crack location, a pre-Cracking technique is developed, where the mode-mixity, number of cycles, Crack Increment and load level are accurately controlled. Results show that the debond fracture resistance of foam-cored sandwich specimens depends on parameters such as loading condition (mode-mixity), core and face properties, as well as initial debond Crack location. Lower fracture toughness values were measured for specimens with the initial Crack location in the face laminate.

  • effect of initial debond Crack location on the face core debond fracture toughness
    14th International Conference on Experimental Mechanics, 2010
    Co-Authors: Quispitupa A Yupa, Christian Berggreen
    Abstract:

    This paper studies the effect of initial Crack location on the face/core debond fracture toughness under different mixed mode loading conditions. The mixed mode loading at the Crack tip is defined in terms of the mode-mixity. In order to achieve the desired initial debond Crack location, a pre-Cracking technique is developed, where the mode-mixity, number of cycles, Crack Increment and load level are accurately controlled. Results show that the debond fracture resistance of foam-cored sandwich specimens depends on parameters such as loading condition (mode-mixity), core and face properties, as well as initial debond Crack location. Lower fracture toughness values were measured for specimens with the initial Crack location in the face laminate.

Glaucio H. Paulino - One of the best experts on this subject based on the ideXlab platform.

  • On Fracture Criteria for Mixed-Mode Crack Propagation in Functionally Graded Materials
    Mechanics of Advanced Materials and Structures, 2007
    Co-Authors: Jeong-ho Kim, Glaucio H. Paulino
    Abstract:

    This paper addresses mixed-mode Crack growth in two-dimensional functionally graded materials, and assesses the predictive capability of some fracture criteria on both Crack growth direction and Crack initiation condition. Automatic simulation of mixed-mode Crack propagation in homogeneous and functionally graded materials is performed by means of the finite element method in conjunction with a remeshing algorithm. Crack growth simulation consists of iterative procedures for the calculation of mixed-mode stress intensity factors by means of the interaction integral method, determination of Crack growth direction and Crack initiation, and local automatic remeshing along the Crack path. The present approach requires a user-defined Crack Increment at the beginning of the simulation. Crack trajectories obtained by the present simulation are compared with available experimental results.

  • mixed mode Crack propagation in functionally graded materials
    Materials Science Forum, 2005
    Co-Authors: Jeong-ho Kim, Glaucio H. Paulino
    Abstract:

    This paper presents numerical simulation of mixed-mode Crack propagation in functionally graded materials by means of a remeshing algorithm in conjunction with the finite element method. Each step of Crack growth simulation consists of the calculation of the mixedmode stress intensity factors by means of a non-equilibrium formulation of the interaction integral method, determination of the Crack growth direction based on a specific fracture criterion, and local automatic remeshing along the Crack path. A specific fracture criterion is tailored for FGMs based on the assumption of local homogenization of asymptotic Crack-tip fields in FGMs. The present approach uses a user-defined Crack Increment at the beginning of the simulation. Crack trajectories obtained by the present numerical simulation are compared with available experimental results.

  • Simulation of Crack Propagation in Functionally Graded Materials Under Mixed-Mode and Non-Proportional Loading
    Mechanics and Materials in Design, 2004
    Co-Authors: Jeong-ho Kim, Glaucio H. Paulino
    Abstract:

    Automatic simulation of Crack propagation in homogeneous and functionally graded materials is performed by means of a remeshing algorithm in conjunction with the finite element method. The Crack propagation is performed under mixed-mode and non-proportional loading. Each step of Crack growth simulation consists of calculation of mixed-mode stress intensity factors by means of a novel formulation of the interaction integral method, determination of Crack growth direction based on a specific fracture criterion, and local automatic remeshing along the Crack path. The present approach requires a user-defined Crack Increment at the beginning of the simulation. Crack trajectories obtained by the present numerical simulation are compared with available experimental results.

M. Mazari - One of the best experts on this subject based on the ideXlab platform.

  • strain energy density prediction of Crack propagation for 2d linear elastic materials
    Theoretical and Applied Fracture Mechanics, 2013
    Co-Authors: A. Boulenouar, N. Benseddiq, M. Mazari
    Abstract:

    Abstract When the loading or the geometry of a structure is not symmetrical about the axis of the Crack, the rupture occurs in mixed mode loading, and the Crack does not propagate in a straight line. It is then necessary to use kinking criteria to determine the new direction of Crack propagation. The aim of this work is to present a numerical modeling of Crack propagation under mixed mode loading conditions. This work is based on the implementation of the displacement extrapolation method (DEM) and the strain energy density theory in a finite element code. At each Crack Increment length, the kinking angle is evaluated as a function of stress intensity factors (SIFs). In this paper, we analyzed the mechanical behavior of inclined Cracks by evaluating the stress intensity factors. Then, we present the examples of Crack propagation in structures containing inclusions and cavities.

  • Two-dimensional Numerical Estimation of Stress Intensity Factors and Crack Propagation in Linear Elastic Analysis
    Engineering Technology & Applied Science Research, 2013
    Co-Authors: A. Boulenouar, N. Benseddiq, M. Mazari
    Abstract:

    When the loading or the geometry of a structure is not symmetrical about the Crack axis, rupture occurs in mixed mode loading and the Crack does not propagate in a straight line. It is then necessary to use kinking criteria to determine the new direction of Crack propagation. The aim of this work is to present a numerical modeling of Crack propagation under mixed mode loading conditions. This work is based on the implementation of the displacement extrapolation method in a FE code and the strain energy density theory in a finite element code. At each Crack Increment length, the kinking angle is evaluated as a function of stress intensity factors. In this paper, we analyzed the mechanical behavior of inclined Cracks by evaluating the stress intensity factors. Then, we presented the examples of Crack propagation in structures containing inclusions and cavities

S M Barinov - One of the best experts on this subject based on the ideXlab platform.

  • estimation of energy dissipative process development during Crack propagation in an intermetallic alloy
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 1993
    Co-Authors: S M Barinov
    Abstract:

    Abstract A technique based on the non-linear energy principles of fracture for evaluation of the elastic and irreversible constituents of the Crack growth resistance is described. These contributions were determined for two Ni 3 Al-based cast alloys. It was shown that the irreversible part of the Crack propagation resistance goes through a maximum with the Crack Increment, while the linear elastic constituent is generally constant. An alloy containing Cu develops an energy dissipation zone to a greater extent than does an Mo-doped alloy.

A. Quispitupa Yupa - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Initial Debond Crack Location on the Face/core Debond Fracture Toughness
    EPJ Web of Conferences, 2010
    Co-Authors: A. Quispitupa Yupa, Christian Berggreen
    Abstract:

    This paper studies the effect of initial Crack location on the face/core debond fracture toughness under different mixed mode loading conditions. The mixed mode loading at the Crack tip is defined in terms of the mode-mixity. In order to achieve the desired initial debond Crack location, a pre-Cracking technique is developed, where the mode-mixity, number of cycles, Crack Increment and load level are accurately controlled. Results show that the debond fracture resistance of foam-cored sandwich specimens depends on parameters such as loading condition (mode-mixity), core and face properties, as well as initial debond Crack location. Lower fracture toughness values were measured for specimens with the initial Crack location in the face laminate.