Thermal buckling analysis of functionally graded plates considering neutral surface and homogenization scheme
중립면과 균질화 기법을 고려한 경사기능재료의 열적 좌굴 해석

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dc.description학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부, 2015. 2. 김지환.-
dc.description.abstractFunctionally graded materials (FGMs) are non-homogeneous materials which material properties are gradually changed from one surface to the other. Due to the
asymmetry of the material properties of the Functionally Graded Materials(FGMs) in the thickness direction, neutral surface of the model is not same as the mid-plane of the symmetric structure. In order to investigate the thermal bucking behavior of FGMs, neutral surface is chosen as a reference plane. Further, the effective material properties such as Youngs modulus and Poissons ratio are homogenized using Mori-Tanaka scheme which considers the interaction among adjacent inclusions. In this work, the finite element methods are used, and the first-order shear deformation theory of plate are accounted. The thermal loads are assumed to be uniform, linear and non-linear distribution through the thickness directions, respectively. Also, the effects of various parameters for thermal buckling behavior of FGM panel are discussed in detail.

Abstract ‥‥‥‥‥‥‥‥ i
Contents ‥‥‥‥‥‥‥‥ ii
List of Tables and Figures ‥‥‥‥‥‥‥‥ iii

1. Introduction ‥‥‥‥‥‥‥‥ 1

2. Theoretical formulation ‥‥‥‥‥‥‥‥ 4
2.1 FGM modeling using Rule of mixture ‥‥‥‥‥‥‥‥ 4
2.2 FGM modeling using homogenization scheme ‥‥‥‥‥‥‥‥ 6
2.3 Physical neutral surface ‥‥‥‥‥‥‥‥ 8

3. Governing equation based on neutral surface ‥‥‥‥‥‥‥‥ 10
3.1 Displacement field and strain ‥‥‥‥‥‥‥‥ 10
3.2 Constitutive equations ‥‥‥‥‥‥‥‥ 10
3.3 Thermal bucking analysis ‥‥‥‥‥‥‥‥ 12

4. Numerical Results & Discussion ‥‥‥‥‥‥‥‥ 16
4.1 Code Verification ‥‥‥‥‥‥‥‥ 16
4.2 Buckling analysis ‥‥‥‥‥‥‥‥ 17

5. Conclusions and Future works ‥‥‥‥‥‥‥‥ 19

References ‥‥‥‥‥‥‥‥ 20
국문 초록 ‥‥‥‥‥‥‥‥ 43
dc.format.extent2297460 bytes-
dc.publisher서울대학교 대학원-
dc.subjectThermal buckling-
dc.titleThermal buckling analysis of functionally graded plates considering neutral surface and homogenization scheme-
dc.title.alternative중립면과 균질화 기법을 고려한 경사기능재료의 열적 좌굴 해석-
dc.contributor.affiliation공과대학 기계항공공학부-
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Theses (Master's Degree_기계항공공학부)
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