Journals / CMC / Vol.46, No.3
Table of Content


    Molecular Dynamics Analysis of High-temperature Molten-salt Electrolytes in Thermal Batteries

    C. F. Chen1, H. Y. Li1, C. W. Hong1,2
    CMC-Computers, Materials & Continua, Vol.46, No.3, pp. 145-163, 2015, DOI:10.3970/cmc.2015.046.145
    Abstract The purpose of this research is to improve the discharge rate and to predict the melting point of high-temperature molten-salt electrolytes in thermal batteries. Using molecular dynamics (MD) simulation techniques, we tried to develop some novel ternary and quaternary molten electrolytes to replace conventional binary LiCl-KCl ones. The simulation results with greater ionic conductivity and lower melting point are consistent with experimental results reported by previous literatures. The MD results have found that the lithium ion mole fraction in the molten-salt electrolytes affects the ionic conductivity significantly. This paper demonstrates that MD simulation techniques are a useful tool to screen… More >


    Modeling the Axial Splitting and Curling of Metal Tubes under Crush Loads

    W.Xu1, A.M. Waas2
    CMC-Computers, Materials & Continua, Vol.46, No.3, pp. 165-194, 2015, DOI:10.3970/cmc.2015.046.165
    Abstract Plastic deformation and splitting are two important mechanisms of energy dissipation when metal tubes undergo axial crushing. Isotropic J2 plasticity theory combined with a failure criterion is used to model axial splitting and curling of metal tubes undergoing axial crush. The proposed material model is implemented within a finite element (FE) framework using the user material subroutine VUMAT option available in the commercial code ABAQUS. Experimental results from literature are used to validate the model. The predicted splitting and curling patterns as well as the load-displacement response agree well with the experimental observations. The present material model is also used… More >


    Analysis of Local Fracture Strain and Damage Limit of Advanced High Strength Steels using Measured Displacement Fields and FEM

    N. Ma1,2, K. Sato3, K. Takada4
    CMC-Computers, Materials & Continua, Vol.46, No.3, pp. 195-219, 2015, DOI:10.3970/cmc.2015.046.195
    Abstract The local mechanical behaviors of advanced high strength steels undergoing a very large strain from uniform plastic deformation to fracture were investigated with the aid of a measured displacement field and a measurement based FEM. As a measurement method, a digital image grid method (DIGM) was developed and the three-direction transient displacement field on uniaxial tensile test pieces was measured. Combining the measured transient displacement field with the finite element method, a measurement based FEM (M-FEM) was developed for the computation of distribution of the local strains, local stresses and ductile damage accumulation in a tensile test piece. Furthermore, the… More >

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