The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform

S K Naboulsi - One of the best experts on this subject based on the ideXlab platform.

  • an overview of a Continuum Mechanic Approach to a thermodynamic model of failure
    1998
    Co-Authors: A N Palazotto, S K Naboulsi
    Abstract:

    Abstract : This report provides a prelude to the work developed by Smirnov et al considering the damage model of laminated composite materials. An overview of the thermodynamic definitions, concepts, and principles will be presented. This overview of the thermodynamics is necessary to provided the background needed to understand the damage model, which is based on thermodynamic principles. The essentials will be presented as follows: (1) concepts and definitions, (2) balancing laws, (3) thermodynamic equilibrium or thermostatic, and (4) the thermodynamic process. Furthermore, the essentials of thermodynamics will be used to illustrate the development of the model of failure given by Kiselev and Yumashev. The Kiselev and Yumashev model will be discussed prior to Smirnov's damage model since both are similar in their postulation of damage for structures undergoing impacts, and are based on thermodynamic principles. However, they are different in that the former is developed for elastoplastic isotropic homogeneous material, and the latter is developed for laminated composite materials based on viscoelastic constitutive laws. That is, the constitutive equations for an elastoplastic material will be discussed to illustrate the use of a thermodynamic model of failure first then the constitutive relations that incorporate a time dependent viscoelastic laminated composite materials will eventually be added in a subsequent report.

A N Palazotto - One of the best experts on this subject based on the ideXlab platform.

  • an overview of a Continuum Mechanic Approach to a thermodynamic model of failure
    1998
    Co-Authors: A N Palazotto, S K Naboulsi
    Abstract:

    Abstract : This report provides a prelude to the work developed by Smirnov et al considering the damage model of laminated composite materials. An overview of the thermodynamic definitions, concepts, and principles will be presented. This overview of the thermodynamics is necessary to provided the background needed to understand the damage model, which is based on thermodynamic principles. The essentials will be presented as follows: (1) concepts and definitions, (2) balancing laws, (3) thermodynamic equilibrium or thermostatic, and (4) the thermodynamic process. Furthermore, the essentials of thermodynamics will be used to illustrate the development of the model of failure given by Kiselev and Yumashev. The Kiselev and Yumashev model will be discussed prior to Smirnov's damage model since both are similar in their postulation of damage for structures undergoing impacts, and are based on thermodynamic principles. However, they are different in that the former is developed for elastoplastic isotropic homogeneous material, and the latter is developed for laminated composite materials based on viscoelastic constitutive laws. That is, the constitutive equations for an elastoplastic material will be discussed to illustrate the use of a thermodynamic model of failure first then the constitutive relations that incorporate a time dependent viscoelastic laminated composite materials will eventually be added in a subsequent report.

Mark Aschheim - One of the best experts on this subject based on the ideXlab platform.

  • Refined-compression field theory for thin low-reinforced sandwich panels subjected to reversed cyclic horizontal loads
    Glodel Impresiones Digiales, 2011
    Co-Authors: Luisa María Gil-martín, Enrique Hernández-montes, T. Trombetti, Mark Aschheim
    Abstract:

    Refinements to modified compression-field theory has been recently proposed in order to better predict the behaviour of reinforced concrete members subjected to in-plane shear and axial stresses, leading to the so-called refined-compression field theory, RCFT. This theory is based on the Continuum Mechanic Approach, i.e. satisfy compatibility, equilibrium and constitutive equations in terms of average (i.e. \u201csmeared\u201d) stresses and strains. The original refinement proposed by RCFT, with respect to the two fundamental theories for reinforced concrete member subjected to shear, i.e. the Modified Compression-Field Theory, MCFT, and the Rotating-Angle Softened Truss Model, RA-STM, deals with the introduction of an embedded bar model based on the tension stiffening in concrete. In this paper further refinements are proposed with reference to two different typologies of thin low-reinforced sandwich panels subjected to reversed cyclic lateral loads: (a) reinforced concrete sandwich panels produced by \u201cNydion Costruzioni s.p.a.\u201d; (b) cement-stucco plastered straw bale walls; a total of 4 full-scale \u201cNydion panels\u201d and 3 full-scale straw-bale walls were tested. The predictions of the RCFT are compared with the experimental data as well as with the predictions given by the MCFT and RA-STM

Luisa María Gil-martín - One of the best experts on this subject based on the ideXlab platform.

  • Refined-compression field theory for thin low-reinforced sandwich panels subjected to reversed cyclic horizontal loads
    Glodel Impresiones Digiales, 2011
    Co-Authors: Luisa María Gil-martín, Enrique Hernández-montes, T. Trombetti, Mark Aschheim
    Abstract:

    Refinements to modified compression-field theory has been recently proposed in order to better predict the behaviour of reinforced concrete members subjected to in-plane shear and axial stresses, leading to the so-called refined-compression field theory, RCFT. This theory is based on the Continuum Mechanic Approach, i.e. satisfy compatibility, equilibrium and constitutive equations in terms of average (i.e. \u201csmeared\u201d) stresses and strains. The original refinement proposed by RCFT, with respect to the two fundamental theories for reinforced concrete member subjected to shear, i.e. the Modified Compression-Field Theory, MCFT, and the Rotating-Angle Softened Truss Model, RA-STM, deals with the introduction of an embedded bar model based on the tension stiffening in concrete. In this paper further refinements are proposed with reference to two different typologies of thin low-reinforced sandwich panels subjected to reversed cyclic lateral loads: (a) reinforced concrete sandwich panels produced by \u201cNydion Costruzioni s.p.a.\u201d; (b) cement-stucco plastered straw bale walls; a total of 4 full-scale \u201cNydion panels\u201d and 3 full-scale straw-bale walls were tested. The predictions of the RCFT are compared with the experimental data as well as with the predictions given by the MCFT and RA-STM

Nur Asiha Binti Sazali 2 - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of cortical bone fracture in human thigh segment through finite element
    Journal of Telecommunication Electronic and Computer Engineering Universiti Teknikal Malaysia Melaka, 2018
    Co-Authors: Nur Asiha Binti Sazali 2
    Abstract:

    Stress intensity factor, K, and von mises stress have been obtained by using three-point bending test in twodimensional (2D) model of cortical bone in human thigh segment. This test has been done in finite element analysis (K) with respect to the Continuum Mechanic Approach. The K values obtained from the Ansys simulation is almost similar to the K values of the equation. The differences values between them were in between 0.02% to 6.64%. The values obtained in von mises stress increases whenever the crack length decreases, while the maximum value obtained when the crack length is 1mm. The values of K is directly proportional to the ratio of crack length, where whenever the ratio of the crack length over width increases, the K values also increases