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초록· 키워드
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Functionally Graded Materials (FGM) as advanced heterogeneous composite materials have a higher performance than a conventional composite or bimaterial composite under some severe environments. As a heterogeneous material, FGM is commonly used in spacecraft, defense, nuclear and automotive industries due to its excellent properties. The purposes of this study are to evaluate the stress distribution and crack behaviors by the multiscale simulation. FGM contains two or more than two materials that the composition is structured continuously. Two types of FGM model are suggested, which are created by arbitrary prediction of the volume fraction and the exponential function. Aluminum as the metal matrix constituent and silicon carbide as the ceramic particle constituent are structured gradually by two types and the three point bending test also estimated. Moreover, two kinds of crack location were introduced in order to get the influences of material property distribution on the stress intensity factor. From the results we found that the stress intensity factors are increased in the case from softer to stiffer material, while vice versa.
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참고문헌 (13)
참고문헌 신청
R. M. Mahamood / 2012 / Functionally Graded Material: An Overview / Proceedings of the World Congress on Engineering 3(4):1593~1597
G. Udupa / 2014 / Functionally Graded Composite Materials: An Overview / Material Science Engineering 5:1291~1299
M. Ševčík / 2009 / An Evaluation of the Stress Intensity Factor in Functionally Graded Materials / Applied and Computational Mechanics 3:401~410
J. E. Dolbow / 2002 / On the Computation of Mixed-Mode Stress Intensity Factors in Functionally Graded Materials / International Journal of Solids and Structures 39:2557~2574
M. T. Tilbrook / 2005 / Crack Propagation in Graded Composites / Composites Science and Technology 65:201~220
G. Udupa / 2014 / Functionally Graded Composite Materials: An Overview / Material Science Engineering 5:1291~1299
M. Ševčík / 2009 / An Evaluation of the Stress Intensity Factor in Functionally Graded Materials / Applied and Computational Mechanics 3:401~410
J. E. Dolbow / 2002 / On the Computation of Mixed-Mode Stress Intensity Factors in Functionally Graded Materials / International Journal of Solids and Structures 39:2557~2574
M. T. Tilbrook / 2005 / Crack Propagation in Graded Composites / Composites Science and Technology 65:201~220
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