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Viscoelastic Fracture Mechanics of Functionally Graded Materials

ABSTRACT第3-4页
摘要第5-14页
1.Introduction第14-19页
    1.1 Background第14-15页
    1.2 Purpose of this research第15页
    1.3 Literature review第15-18页
        1.3.1 Research on linear elastic fracture mechanics of FGMs第16-17页
        1.3.2 Research on viscoelastic fracture mechanics of FGMs第17页
        1.3.3 Problems existing in the current research第17-18页
    1.4 Construction and organization of the thesis第18-19页
2.Functionally graded materials and the fracture mechanics第19-51页
    2.1 Introduction of functionally graded materials第19-21页
    2.2 Preparation methods for FGMs第21-25页
    2.3 Evaluation of FGMs properties第25页
    2.4 Introduction of the linear fracture mechanics第25-32页
        2.4.1 Stress-concentration factor第27-30页
        2.4.2 Griffith crack theory第30-32页
    2.5 Linear elastic fracture mechanics第32-39页
        2.5.1 Introduction第32-33页
        2.5.2 Modes of loading第33-35页
        2.5.3 Specimen geometries第35-39页
    2.6 Crack tip plasticity第39-47页
        2.6.1 Introduction第39-40页
        2.6.2 Crack tip stress state第40-43页
        2.6.3 Crack opening displacement (COD)第43-47页
    2.7 Energy release rate第47-49页
    2.8 Conclusion第49-51页
3.Finite element model of FGM第51-62页
    3.1 Introduction of FEM第51-57页
        3.1.1 Output第51-53页
        3.1.2 Analysis第53-54页
        3.1.3 Contour integral evaluation第54-55页
        3.1.4 The stress intensity factors第55-56页
        3.1.5 Element第56-57页
    3.2 Model for FGM第57-61页
        3.2.1 Properties of FGM TiC-Ni第57-59页
        3.2.2 Geometry and finite element mesh of FGM第59-61页
    3.3 Conclusion第61-62页
4.Finite element analysis of linear elastic crack tip field of FGM第62-74页
    4.1 Introduction第62页
    4.2 Analysis with a tensile load第62-70页
    4.3 Analysis with constant residual stress第70-72页
    4.4 Analysis with constant residual strain第72页
    4.5 Conclusion第72-74页
5.V iscoelastic crack tip field of FGM第74-97页
    5.1 Introduction of viscoelasticity第74-76页
    5.2 Purely viscous linear response第76-81页
        5.2.1 Introduction of purely elastic linear response第76-78页
        5.2.2 Introduction of purely viscous linear response第78-81页
    5.3 Linear time-dependent behavior第81-90页
        5.3.1 Differential representations: the operator equation第83-85页
        5.3.2 Integral representation: the Boltzmann superposition integra第85-88页
        5.3.3 Excitation and response in the transform plane第88-90页
    5.4 Correspondence principle第90-92页
    5.5 Solution of viscoelastic crack tip field of FGM第92-96页
    5.6 Conclusion第96-97页
6. Conclusion第97-100页
    6.1 Summary第97-98页
    6.2 Recommendations for future research第98-100页
References第100-105页

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