Multiscale Simulation for a Crack Behavior in Heterogeneous Materials

• Published in: 한국안전학회지, 32(4) pp. 1 - 6
• Main Authors: 누룰 파토니, 권오헌
• Format: Journal Article
• Language: English
• Published: 한국안전학회 01.08.2017
• Subjects: 안전공학
• ISSN: 1738-3803; 2383-9953

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. KCI Citation Count: 1