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http://dx.doi.org/10.14346/JKOSOS.2017.32.4.1

Multiscale Simulation for a Crack Behavior in Heterogeneous Materials  

Fatoni, Nurul Fajriyah (Graduate School of Department of Safety Engineering, Pukyong National University)
Kwon, Oh Heon (Department of Safety Engineering, Pukyong National University)
Publication Information
Journal of the Korean Society of Safety / v.32, no.4, 2017 , pp. 1-6 More about this Journal
Abstract
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.
Keywords
heterogeneous material; FGM; multiscale; crack behavior;
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Times Cited By KSCI : 1  (Citation Analysis)
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