Materias: “…Engineering Mechanical Engineering…”

Tabla de Contenidos: “…List of Figures xv -- List of Tables xxiii -- List of Abbreviations and Symbols xxv -- 1 Introduction. 1 -- 1.1 Motivation . 1 -- 1.2 Scope and objective. 5 -- 1.3 Contribution to the current state of research. 6 -- 1.4 Outline of this dissertation 8 -- 2 Current state of research 9 -- 2.1 Definition of hybrid materials 9 -- 2.2 Composite materials . 14 -- 2.2.1 Definition and fundamentals 14 -- 2.2.2 Basic mechanisms of fibrous reinforcement. 16 -- 2.3 Sheet moulding compound composites. 21 -- 2.3.1 Definition and terminology delimitation 21 -- 2.3.2 Discontinuous SMC composites 21 -- 2.3.3 Continuous SMC composites 57 -- 2.4 Hybrid composites . 61 -- 2.4.1 Definition, motivation and development -- of hybrid composites . 62 -- 2.4.2 Evaluation of hybridisation effects . 65 -- 2.4.3 Existing concepts of hybrid SMC . 68 -- 2.5 Research questions . 82 -- 3 Materials and specimen geometries 85 -- 3.1 Manufacturing of SMC composites 85 -- 3.1.1 Composition of resin systems . 85 -- 3.1.2 Manufacturing of semi-finished sheets 87 -- 3.1.3 Manufacturing of compression moulded sheets . 89 -- 3.1.4 Manufacturing of pure resin sheets 92 -- 3.1.5 Manufacturing of demonstrator part 93 -- 3.2 Specimen preparation and geometry 94 -- 3.2.1 Water-jet cutting and milling 94 -- 3.2.2 End tabs. 95 -- 3.2.3 Specimen geometries . 95 -- 4 Experimental setups, procedures and data evaluation 103 -- 4.1 Characterisation strategy 103 -- 4.2 Characterisation at the coupon level 105 -- 4.2.1 Microstructural characterisation 105 -- 4.2.2 Macrostructural characterisation . 106 -- 4.3 Characterisation at the structure level. 114 -- 4.3.1 Quasi-static puncture testing 114 -- 4.3.2 Dynamic puncture testing . 116 -- 4.4 Characterisation at the component level 118 -- 4.5 Data evaluation . 121 -- 5 Analytical modelling 123 -- 5.1 Description of modelling approach 123 -- 5.2 Micromechanics and homogenisation methods . 124 -- 5.2.1 Fundamentals of homogenisation 124 -- 5.2.2 Analytical modelling of fibre reinforced polymers 128 -- 5.3 Classical laminate theory 133 -- 5.3.1 Macromechanical characterisation of a lamina . 134 -- 5.3.2 Macromechanical characterisation of a laminate. 134 -- 5.4 Analytical modelling of hybrid composites 138 -- 5.4.1 Rule of hybrid mixtures 139 -- 5.4.2 Tensile and flexural modulus based on classical laminate theory . 140 -- 6 Results . 143 -- 6.1 Evaluation of testing methods and preliminary studies . 143 -- 6.1.1 Tensile properties of discontinuous SMC composites . 144 -- 6.1.2 Tensile properties of continuous SMC composites 150 -- 6.1.3 Flexural properties of SMC composites . 152 -- 6.2 Microstructural analysis . 158 -- 6.2.1 Fibre volume content . 158 -- 6.2.2 Fibre orientation distribution 164 -- 6.2.3 Interface of continuous-discontinuous SMC 173 -- 6.3 Mechanical properties and failure at the coupon level . 176 -- 6.3.1 Tensile and compressive properties of -- polyester-polyurethane hybrid resin . 176 -- 6.3.2 Process-induced material properties of -- discontinuous glass fibre SMC 179 -- 6.3.3 In-plane loading of SMC composites 190 -- 6.3.4 Out-of-plane loading of SMC composites . 229 -- 6.4 Mechanical properties and failure at the structure level . 237 -- 6.4.1 Puncture properties of discontinuous glass fibre SMC 238 -- 6.4.2 Puncture properties of continuous carbon fibre SMC . 248 -- 6.4.3 Puncture properties of continuous-discontinuous glass/carbon fibre SMC 256 -- 6.5 Mechanical properties and failure at the component level . 268 -- 6.6 Analytical stiffness prediction 271 -- 6.6.1 Analytical stiffness prediction of discontinuous glass fibre SMC 272 -- 6.6.2 Analytical stiffness prediction of continuous carbon fibre SMC . 277 -- 6.6.3 Analytical stiffness prediction of continuous-discontinuous glass/carbon fibre SMC 279 -- 7 Discussion. 283 -- 7.1 Testing methodology and preliminary studies 283 -- 7.2 Material behaviour of unsaturated polyester-polyurethane two-step curing hybrid resin system 285 -- 7.3 Discontinuous glass fibre SMC . 287 -- 7.3.1 Microstructural aspects of discontinuous glass fibre SMC 287 -- 7.3.2 Mechanical behaviour and damage evolution of discontinuous glass fibre SMC . 291 -- 7.4 Continuous carbon fibre SMC 301 -- 7.4.1 Microstructural aspects of continuous carbon fibre SMC . 301 -- 7.4.2 Mechanical behaviour and damage evolution of continuous carbon fibre SMC 302 -- 7.5 Continuous-discontinuous glass/carbon fibre SMC 308 -- 7.5.1 Microstructural aspects of continuous-discontinuous glass/carbon fibre SMC 308 -- 7.5.2 Mechanical properties, damage evolution and hybridisation effect 310 -- 8 Final remarks . 347 -- 8.1 Summary . 347 -- 8.2 Conclusion . 356 -- Bibliography 361 -- A Appendix 403 -- A.1 Influence of subset size and step size . 403 -- A.2 Influence of edge preparation 405 -- A.3 Tensile properties of discontinuous glass fibre SMC (2D) . 406 -- A.4 Tensile properties of discontinuous glass fibre SMC (1D) . 407 -- A.5 Compressive properties of discontinuous glass fibre SMC . 408 -- A.6 Tensile and compressive properties of continuous carbon fibre SMC . 409 -- A.7 Flexural properties of continuous carbon fibre SMC. 410 -- A.8 Flexural properties of continuous-discontinuous glass/carbon fibre SMC . 411 -- A.9 Classical laminate theory: calculations 412.…”

Materias: “…Mechanical engineering…”

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Materias: “…Nonequilibrium statistical mechanics…”

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Materias: “…Slopes (Soil mechanics)…”

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Materias: “…Mechanical engineering Congresses…”

Materias:

Materias: “…Nonequilibrium statistical mechanics…”

Materias: “…Mechanical engineering Congresses…”

Enlace del recurso

Materias: “…General|Mathematics|Mechanics|Physics|Science|Sciences…”
Acceso restringido, con credenciales UPSA