Mechanical behavior of materials
MECHANICAL PROPERTIES OF MATERIALS 2008 ppt
... of a material’s mechanical prop- erties, and all students of Mechanics of Materials will encounter them often. However, they are not without some subtlety, especially in the case of ductile materials ... Problems of Continuum Mechanics, McGraw-Hill, 1970. MECHANICAL PROPERTIES OF MATERIALS David Roylance 2008 24 CHAPTER 1. UNIAXIAL MECHANICAL RESPONSE Prob. 3 Reference...
Ngày tải lên: 24/03/2014, 05:20
báo cáo hóa học:" The influence of a weight-bearing platform on the mechanical behavior of two Ilizarov ring fixators: tensioned wires vs. half-pins" pdf
... made available soon. The influence of a weight-bearing platform on the mechanical behavior of two Ilizarov ring fixators: tensioned wires vs. half-pins Journal of Orthopaedic Surgery and Research ... The aim of this study was to compare the axial stiffness of a two-ring, half-pin frame with that of the traditional four-ring, all-wire frame. Additionally, the biomechanical e...
Ngày tải lên: 20/06/2014, 07:20
Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 1 doc
... dimensions: σ=E/j=neµ) Ohms/square ⇒ Note, if L=W, then R= ρ /t independent of magnitude of L and W. Useful for working with films of thickness, t. R R R © H.L. Tuller-2001 R=V/I; 3.225 18 How ... problem ⇒ 4 probes © H.L. Tuller-2001 For R 9 3.225 9 Equation of Motion - Impact of Collisions Assume: • probability of collision in time dt = dt/τ • time varying field...
Ngày tải lên: 11/08/2014, 14:20
Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 5 ppt
... Density of Thermally Promoted of Carriers ∫ ∞ = c E dEEgEfn )()( Density of electron states per volume per dE Fraction of states occupied at a particular temperature Number of electrons ... Fermi level is approximately in the middle of the band gap • The law of mass action describes the electron and hole populations, since the total number of electron states is fi...
Ngày tải lên: 11/08/2014, 14:20
Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 10 pps
... Resonator Active layer 3.225 24 © H.L. Tuller-2001 Choice of Piezoelectric Materials • Temperature limitations of piezoelectric materials Material Max Operating Tem p erature ( o C ) Limitations ... allgas_h2.st g Meßprotokoll: 273 Schematic of Gas Sensor Structure 3.225 12 © H.L. Tuller-2001 MicroElectroMechanical Systems - MEMS Micromachining - Application of microfabri...
Ngày tải lên: 11/08/2014, 14:20
Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 9 pps
... materials: 1. Sputtered ZnO film (150 nm (Massachusetts Institute of Technology) 2. Sputtered SnO 2 film (60 nm) (Fraunhofer Institute of Physical Measurement Techniques) • Target gases: H 2 , ... 15 Designer Wavelengths Variation of band-gap energy with composition x of In 1-x Ga x As. © H.L. Tuller, 2001 3.225 16 Band-Gap Colors Mixed crystals of yellow cadmium sul...
Ngày tải lên: 11/08/2014, 14:20
Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 3 pot
... E-E F values v v T U c ∂ ∂ = Heat capacity of metal (which is ~ heat capacity of free e- in a metal): ( [ ( ( ) 2 ~~~ TkEgTkEgTkNEU bFbFb ⋅⋅⋅∆⋅∆ U=total energy of electrons in system TkEg T U c bF v v 2 )(2 ⋅⋅= ∂ ∂ = Right ... λ=h/p~10 -8 cm in size • Certain wavelengths of valence electrons will diffract! © E. Fitzgerald-1999 3.225 8 Diffraction Picture...
Ngày tải lên: 11/08/2014, 14:20
Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 6 pps
... injection: Tk eV np b bi enn − = Tk eV pn b bi epp − = n n n p p n p p eV bi eV bi © E. Fitzgerald-1999 Qualitative Effect of Bias • Applying a potential to the ends of a diode does NOT increase current through drift • The applied voltage ... 10 CMOS Devices © H.L. Tuller, 2001 5 3.225 7 Use of Minority Carrier Diffusion Equations • Example: Light shining on a surface of a se...
Ngày tải lên: 11/08/2014, 14:20
Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 8 pdf
... Interaction of the d orbitals of a central ion with six ligands in an octahedral arrangement. Octahedral Environment of Transition Metal Ion © H.L. Tuller, 2001 3.225 12 The splitting of the ... + - C O O p=0 +q -q θ For a group of many molecules at some temperature: Tk pE Tk U bb eef θ cos == − After averaging over the polarization of the ensemble molecu...
Ngày tải lên: 11/08/2014, 14:20
Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 4 pps
... periodicity of the lattice () () () ( ) Rruru ruer rik += =Ψ ⋅ Note the probability density spatial info is in u(r): () )( * 2 * ruru o ⋅Ψ=ΨΨ An equivalent way of writing the Bloch theorem in terms of ... 1/2) l l l l 0 -13.6eV U(r) © E. Fitzgerald-1999 ) in -1 3.225 9 Diffraction Picture of the Origin of Band Gaps Probability Density=probability/volume of finding electron=|ψ|...
Ngày tải lên: 11/08/2014, 14:20