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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27097


    Title: EFFECT OF DISLOCATION DIPOLES ON FRACTURE-BEHAVIOR IN 2-PHASE MEDIUM
    Authors: YANG,YS;LEE,SL;CHENG,JW
    Contributors: 機械工程學系
    Keywords: FREE ZONE MODEL;CRACK TIP;SCREW DISLOCATIONS;ELASTIC INTERACTION;ELECTRON-MICROSCOPE;SURFACE CRACK
    Date: 1994
    Issue Date: 2010-06-29 18:07:40 (UTC+8)
    Publisher: 中央大學
    Abstract: On the basis of the results of Lin et al. [Mater. Sci. Eng., 95, 167 (1987)], we have investigated the elastic interaction between screw dislocation dipoles and an internal crack in a two-phase medium. The complex potential, stress field, stress intensity factor, crack extension force, strain energy, image force and image torque are derived. The magnitude of each physical variable in the dipole system is smaller than those of the counterparts in a monopole system. Both the translation and rotation must be considered in the static equilibrium. The mechanical behavior of the medium is strongly influenced by the shear modulus ratio of the two-phase medium and the dislocations inside the internal crack. Finally, our results can be reduced to several special cases.
    Relation: JSME INTERNATIONAL JOURNAL SERIES A-MECHANICS AND MATERIAL ENGINEERING
    Appears in Collections:[機械工程研究所] 期刊論文

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