Multiscale mechanical characterization of soft matter

... in soft matter research and beyond It is no wonder that de Gennes is now considered one of the founding fathers of soft matter [5] He succinctly summarize the two outstanding features of soft matter ... List of Figures xiii List of Symbols xvi Chapter : Introduction .1 1.1 Soft matter 1.2 Scale-dependent mechanics of soft matter .3 1.3 Characterization ... M...

Ngày tải lên: 10/09/2015, 08:32

... topology of protein structure is responsible for mechanical properties of protein crystals MODELS MESOSCOPIC MODEL FOR BIOLOGICAL PROTEIN MATERIALS We assume that the mechanical response of biological ... mechanical characterization of protein materials may allow for gaining insight into the biological functions of mechanical proteins Mechanica...

Ngày tải lên: 22/02/2014, 08:20

... doi:10.1186/1556-276X-6-481 Cite this article as: Fang et al.: Mechanical characterization of nanoindented graphene via molecular dynamics simulations Nanoscale Research Letters 2011 6:481 Submit ... pile ups and corrugations of graphene were observed Strong adhesion causes topological defects and vacancies The average contact stiffnesses of the graphene at temperature...

Ngày tải lên: 21/06/2014, 01:20

... of lipids in the core samples 1.2 Study Area – Victoria Harbour, Hong Kong SAR Victoria Harbour is located in the Hong Kong Special Administrative Region (SAR) of China, between Kowloon and Hong ... factors controlling organic matter deposition in Victoria Harbour 1903 Kowloon Kowloon Bay Victoria Harbour Hong Kong Island 1949 Kowloon Kowloon Kowloon...

Ngày tải lên: 14/11/2014, 07:29

... MECHANICAL CHARACTERIZATION OF BIOPOLYMER AND THE EFFECTS OF MECHANICAL PROPERTIES OF EXTRACELLULAR MATRIX ON CELL BEHAVIORS WONG LONG HUI (B.Eng.(Hons.), NTU) A THESIS SUBMITTED FOR THE ... in cell and extracellular matrix interactions The first part of the thesis involved the use of conventional macrorheological technique to uncover the ri...

Ngày tải lên: 09/09/2015, 11:28

... MECHANICAL CHARACTERIZATION AND MODELING OF POLYMER/CLAY NANOCOMPOSITES SONG SHAONING (B.ENG) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF MECHANICAL ENGINEERING ... illustration of crack initiation and propagation in the epoxy/clay nanocomposites Figure 1.3 Mechanical properties of the epoxy/S-clays and the nylon 6/clay nanocomposit...

Ngày tải lên: 09/09/2015, 11:20

... micro- fabricated cantilevers were used to investigate the stresses and density changes upon crystallization in amorphous thin films Two classes of materials with distinct properties and significant ... of Young’s modulus and coefficients of thermal expansion of amorphous Cu-Zr thin films - 162 7.1 Measurement of Young’s modulus of amorphous Cu-Zr...

Ngày tải lên: 11/09/2015, 09:16

... 11 1 4.4.5 Work of Indentation and Fracture Energy 11 2 4.5 Conclusion Reference Chapter 5: Comparison of the Finite Element Simulation and Experiments of Wedge Indentation Test 11 8 12 0 12 3 5 .1 ... Mater Res., 12 , p .19 00 -19 10, (19 97) 11 M.D Drory and J.W Hutchinson, Science, 263, p .17 53 -17 55, (19 94) 12 M.D Drory and J.W Hutchinson, Proc R Soc London, Ser A,...

Ngày tải lên: 11/09/2015, 09:56

... middle of th wedge im m he mpression), and the FE ESEM plane view (Fig.4.4(a)) sho only e ows a central cra at this lo ack oad Fig F 4.3: Cr ross-section views o 120 ° wedge indenta nal of ations ... oad Fig F 4.3: Cr ross-section views o 120 ° wedge indenta nal of ations on th MSQ/Si system he i using FIB: ( no interf u (a) facial crack; (b) – (d) in nterfacial cr rack propag g...

Ngày tải lên: 11/09/2015, 09:56

... characterize the interfacial adhesion properties (e.g interfacial energy and interfacial strength), the interfacial cracking pattern is of particular interest The wedge and the conical indentation methods ... the interfacial crack front was found to be parallel to the length axis of the wedge indentation impression on the 200 nm BD film, and a curved interfacial crac...

Ngày tải lên: 11/09/2015, 09:56

... Curvature of interfaci crack front determ ial fr mined for t BD film with the ms thickness t anging from 100 to 100 m 00nm [2] 90 Chapter C Fig F 4. 16: FESEM plan ne-view ima ages of the wedge inden ... tionship bet tween the cu urvature of crack front and the f t film thickne As can be seen i Fig.4. 16( for a B film ≤ 100 nm th f ess n in (a), BD hick, the interfacial c i crack fr...

Ngày tải lên: 11/09/2015, 09:56

... 2.69 8. 88 ± 0.99 6. 18 ± 0.94 30.60 ± 13.93 t2A 54.21 ± 12.54 52.50 ± 6. 78 12.59 ± 2.17 t2B 40.26 ± 13.53 53. 18 ± 18. 59 6.15 ± 1 .87 t2C 84 .15 ± 65.05 78. 01 ± 72.34 8. 48 ± 4.22 S2A 6.57 ± 1 .82 7.93 ... (nm) Indentation induced stress, (MPa) Critical buckling stress, c (MPa) Interfacial toughness, Γi (J/m2) 1.44 26.0 401.10 88 62. 58 0.049 1.31 24.4 388 .24 107 08. 84 0.0...

Ngày tải lên: 11/09/2015, 09:56

... References 187 VII Summary The feasibility and efficiency of characterizing the mechanical properties of viscoelastic and visco- elastic- plastic materials and their thin films by using nanoindentation techniques ... with the elastic and plastic properties, the visco- elastic and visco- elastic- plastic properties are more difficult to charact...

Ngày tải lên: 12/09/2015, 09:59

... Young’s modulus of two different nanowires 72 vi List of Figures List of Figures Fig 1.2.1 High-resolution TEM image of tungsten nanowire [Tay et al., 2004] Fig 1.2.2 TEM image of tungsten nanowire ... LIST OF TABLES vi LIST OF FIGURES vii LIST OF ABBREVIATIONS xi CHAPTER – INTRODUCTION 1.1 Properties of materials at nanoscales 1.2 Motivation 1.3 Objectives of the...

Ngày tải lên: 03/10/2015, 20:32