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  • Open AccessOpen Access

    ARTICLE

    A Nonlinear Magneto-Mechanical Coupled Constitutive Model for the Magnetostrictive Material Galfenol

    Ying Xiao1,2, Haomiao Zhou1, Xiaofan Gou2,*
    CMC-Computers, Materials & Continua, Vol.54, No.3, pp. 209-228, 2018, DOI:10.3970/cmc.2018.054.209
    Abstract In order to predict the performance of magnetostrictive smart material and push its applications in engineering, it is necessary to build the constitutive relations for the magnetostrictive material Galfenol. For Galfenol rods under the action of the pre-stress and magnetic field along the axial direction, the one-dimensional nonlinear magneto-mechanical coupling constitutive model is proposed based on the elastic Gibbs free energy, where the Taylor expansion of the elastic Gibbs free energy is made to obtain the polynomial forms. And then the constitutive relations are derived by replacing the polynomial forms with the proper transcendental functions… More >

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  • Open AccessOpen Access

    ARTICLE

    On Special Curves According to Darboux Frame in the Three Dimensional Lorentz Space

    H. S. Abdel-Aziz1, M. Khalifa Saad1,2,*
    CMC-Computers, Materials & Continua, Vol.54, No.3, pp. 229-249, 2018, DOI:10.3970/cmc.2018.054.229
    Abstract In the light of great importance of curves and their frames in many different branches of science, especially differential geometry as well as geometric properties and the uses in various fields, we are interested here to study a special kind of curves called Smarandache curves in Lorentz 3-space. Then, we present some characterizations for these curves and calculate their Darboux invariants. Moreover, we classify TP, TU, PU and TPU-Smarandache curves of a spacelike curve according to the causal character of the vector, curve and surface used in the study. Besides, we give some of differential More >

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  • Open AccessOpen Access

    ARTICLE

    Test Vector Optimization Using Pocofan-Poframe Partitioning

    P. PattunnaRajam1, *, Reeba korah2, G. Maria Kalavathy3
    CMC-Computers, Materials & Continua, Vol.54, No.3, pp. 251-268, 2018, DOI:10.3970/cmc.2018.054.251
    Abstract This paper presents an automated POCOFAN-POFRAME algorithm that partitions large combinational digital VLSI circuits for pseudo exhaustive testing. In this paper, a simulation framework and partitioning technique are presented to guide VLSI circuits to work under with fewer test vectors in order to reduce testing time and to develop VLSI circuit designs. This framework utilizes two methods of partitioning Primary Output Cone Fanout Partitioning (POCOFAN) and POFRAME partitioning to determine number of test vectors in the circuit. The key role of partitioning is to identify reconvergent fanout branch pairs and the optimal value of primary… More >

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  • Open AccessOpen Access

    ARTICLE

    Time Optimization of Multiple Knowledge Transfers in the Big Data Environment

    Chuanrong Wu1, *, Evgeniya Zapevalova1, Yingwu Chen2, Feng Li3
    CMC-Computers, Materials & Continua, Vol.54, No.3, pp. 269-285, 2018, DOI:10.3970/cmc.2018.054.269
    Abstract In the big data environment, enterprises must constantly assimilate big data knowledge and private knowledge by multiple knowledge transfers to maintain their competitive advantage. The optimal time of knowledge transfer is one of the most important aspects to improve knowledge transfer efficiency. Based on the analysis of the complex characteristics of knowledge transfer in the big data environment, multiple knowledge transfers can be divided into two categories. One is the simultaneous transfer of various types of knowledge, and the other one is multiple knowledge transfers at different time points. Taking into consideration the influential factors, More >

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  • Open AccessOpen Access

    ARTICLE

    Effect of Different Shapes of Conformal Cooling Channel on the Parameters of Injection Molding

    Mahesh S. Shinde1,*, Kishor M. Ashtankar1
    CMC-Computers, Materials & Continua, Vol.54, No.3, pp. 287-306, 2018, DOI:10.3970/cmc.2018.054.287
    Abstract Cooling system improvement is important in injection molding to get better quality and productivity. The aim of this paper was to compare the different shapes of the conformal cooling channels (CCC) with constant surface area and CCC with constant volume in injection molding using Mold-flow Insight 2016 software. Also the CCC results were compared with conventional cooling channels. Four different shapes of the CCC such as circular, elliptical, rectangular and semi-circular were proposed. The locations of the cooling channels were also kept constant. The results in terms of cooling time, cycle time reduction and improvement More >

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