Structural performance and failure analysis of aluminium foams Amsterdam, Emiel IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below. Document Version Publisher's PDF, also known as Version of record Publication date: 2008 Link to publication in University of Groningen/UMCG research database Citation for published version (APA): Amsterdam, E. (2008). Structural performance and failure analysis of aluminium foams s.n. Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons). Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Download date: 04-01-2017
RIJKSUNIVERSITEIT GRONINGEN STRUCTURAL PERFORMANCE AND FAILURE ANALYSIS OF ALUMINIUM FOAMS Proefschrift ter verkrijging van het doctoraat in de Wiskunde en Natuurwetenschappen aan de Rijksuniversiteit Groningen op gezag van de Rector Magnificus, dr. F. Zwarts, in het openbaar te verdedigen op vrijdag 18 april 2008 om 14.45 uur door Emiel Amsterdam geboren op 10 maart 1980 te Hindeloopen
Promotores: Beoordelingscommissie: Prof. dr. J.T.M. De Hosson Prof. dr. ir. P.R. Onck Prof. ir. L. Katgerman Prof. dr. H.A. De Raedt Prof. dr. P. Rudolf
Structural Performance and Failure Analysis of Aluminium Foams E. Amsterdam ISBN 978-90-367-3381-6 ISBN 978-90-367-3382-3 (electronic version) Zernike Institute PhD thesis series 2008-06 Print: Groningen University Press Cover: Anaglyph of an open-cell foam in the scanning electron microscope The work described in this thesis was supported by the Foundation Fundamental Research on Matter-FOM, Utrecht and was partly carried out within the framework of the Strategic Research Program of the Netherlands Institute for Metals Research under project number 02EMM22.
Contents Chapter 1 1 Introduction 1.1 Metal foam 1 1.2 Scope of the thesis 9 References 13 Chapter 2 15 Material and experimental procedure 2.1 Production process 15 2.2 Experimental procedure 17 References 19 Chapter 3 21 Fracture behavior of metal foam made of recycled MMC by the melt route 3.1 Introduction 21 3.2 Material and experimental procedure 22 3.2.1 Material and foaming procedure 22 3.2.2 Experimental equipment and procedure 22 3.3 Results 22 3.3.1 Microstructural characterization 22 3.3.2 Fracture analysis 24 3.4 Discussion 27 3.5 Conclusion 28 References 29 Chapter 4 31 Failure mechanisms of closed-cell aluminium foam under monotonic and cyclic loading 4.1 Introduction 31 4.2 Material and experimental procedure 32 4.3 Microstructural observations 33
4.4 Failure mechanisms 36 4.5 Discussion 42 4.6 Conclusion 45 References 46 Chapter 5 47 Fracture and microstructure of open-cell aluminium foam 5.1 Introduction 47 5.2 Material and experimental procedure 48 5.3 Results 49 5.3.1 Microstructural characterization 49 5.3.2 Fracture behavior 52 5.4 Discussion 57 5.5 Conclusion 58 References 58 Chapter 6 61 The influence of strain induced damage on the mechanical response of open-cell aluminium foam 6.1 Introduction 61 6.2 Material and experimental procedure 62 6.2.1 Aluminium foam 62 6.2.2 Base material 64 6.2.3 Acoustic emission measurement 65 6.2.4 Electrical resistance measurement 66 6.3 Results 68 6.3.1 Tension and compression 68 6.3.2 Acoustic emission measurements 72 6.3.3 Electrical resistance measurements 73 6.4 Discussion 76 6.5 Conclusion 78 References 79 Chapter 7 81 The influence of cell shape anisotropy on the tensile behavior of open-cell aluminium foam
7.1 Introduction 81 7.2 Material and experimental procedure 82 7.2.1 Aluminium foam 82 7.2.2 Electrical resistance measurement 83 7.3 Results 85 7.4 Discussion 89 7.5 Conclusion 90 References 91 Chapter 8 93 The plastic collapse stress of open-cell aluminium foam 8.1 Introduction 93 8.2 Material and experimental procedure 95 8.2.1 Aluminium foam 95 8.2.2 Base material 96 8.3 Results 97 8.4 Discussion 99 8.5 Conclusion 102 References 102 Chapter 9 103 Fracture behavior of low density replicated aluminium alloy foams 9.1 Introduction 103 9.2 Material and experimental procedure 104 9.3 Results and discussion 105 9.4 Conclusion 114 Appendix A 114 References 115 Outlook 117 List of Publications 123 Summary 125 Samenvatting 131 Acknowledgements 137