hardness elastic modulus and fracture toughness measurements
Báo cáo y học: " Vitamin A deficiency alters the pulmonary parenchymal elastic modulus and elastic fiber concentration in rats" pptx
Ngày tải lên :
12/08/2014, 18:21
... determined the effects of CCh on the bulk and shear modulus components of the elastic modulus VAD increases the elastic modulus after CChadministration The bulk modulus, measured at cm PEEP, increased ... architecture We have studied elastic fiber length per unit volume of lung, elastin production, and measured the elastic modulus of the lung parenchyma in VAS and VAD rats before and after the administration ... the elastic fibers and in the bulk and shear moduli The elastic fiber length per unit volume was decreased in VAD rat lungs and may have contributed to the observed differences in shear modulus...
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Development of smoothed numerical methods for fracture analyses and interfacial toughness characterization in thin film systems
Ngày tải lên :
10/09/2015, 08:26
... thin film materials These properties usually include elastic modulus, hardness, yield strength and fracture toughness Elastic modulus and hardness can be easily measured by experimental methods, ... earlier by Hutchinson and Suo [10], and further extended by Chen and Bull recently [11] Depending on the relative properties of film and substrate (hard brittle vs soft ductile), and the quality of ... function Ef Elastic modulus of the film Es Elastic modulus of the substrate hf Film thickness hs Substrate thickness n Strain-hardening exponent Wmi Length of the wedge indenter W fs Width and length...
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Fracture toughness in rate dependent solids based on viod growth and coalescence mechanism
Ngày tải lên :
11/09/2015, 16:04
... Steady-state toughness as a function of the crack velocity for f0 = 0.05 and σ /E = 0.02 (a) Elastic background material and rate-dependent fracture process zone (b) Rate-dependent background material and ... steady-state fracture toughness in polymeric materials and metals (and alloys) at high temperature based on void growth and coalescence mechanism The time dependent behavior of polymeric materials and ... steady-state fracture toughness Γf intrinsic toughness of FPZ Γb extrinsic toughness of background K (|K|) applied stress intensity factor (Amplitude) Γ0 work of separation in the fracture process...
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báo cáo hóa học:" A biomechanical assessment of modular and monoblock revision hip implants using FE analysis and strain gage measurements" potx
Ngày tải lên :
20/06/2014, 04:20
... Constructs A and B Meshing and material properties ANSYS Workbench 10.0 was used to generate meshes For Construct A, the number of nodes and elements was 41098 and 29436 (Modular) and 33270 and 23744 ... nodes and elements was 52121 and 39423 (Modular) and 61577 and 45847 (Monoblock) Body elements included 10-node quadratic tetrahedrons for cortical bone, cancellous bone, and implants, and a ... Modular and Monoblock implants were developed, and strain and stress maps were generated for two constructs, A and B Construct A modeled a hip implant alone under axial forces of 700 and 2000...
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Báo cáo sinh học: " Research Article Applications of a Weighted Symmetrization Inequality to Elastic Membranes and Plates" pptx
Ngày tải lên :
21/06/2014, 17:20
... 2 Journal of Inequalities and Applications ∗ where C is a constant depending on a x and h x , whereas Ω∗ and fμ denote μ symmetrizations of Ω and f, with respect to the measure μ, ... function, dμ h x dx, and C : Kc2 , where K and c are the constants in Definition 2.6, 1,2 1,2 corresponding to the pair h, a Let u ∈ W0 Ω and v ∈ W0 Ω∗ be solutions of P and S , μ respectively ... notation and definitions We call S the symmetrization of P In , see also , the following weighted symmetrization inequality is proved: u∗ x ≤ v x , μ x ∈ Ω∗ , μ 1.1 where u and v are solutions of P and...
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Báo cáo hóa học: " Research Article Building Entry Loss and Delay Spread Measurements on a Simulated HAP-to-Indoor Link at S-Band" pdf
Ngày tải lên :
21/06/2014, 23:20
... Communications and Networking MEASUREMENTS AND DATA ANALYSIS The building penetration loss and the delay spread were measured as a function of elevation angle and building entry angle All measurements ... and azimuths covered by the helicopter was from 15◦ to 60◦ and from −80◦ to 80◦ , respectively Building entry angle incorporates both elevation and azimuth; it is zero for grazing incidence and ... one “complex” (I and Q) channel response versus delay per patch antenna and polarization These instantaneous measurements are called cycles The channel sounder transmits a pseudorandom sequence...
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Báo cáo hóa học: " A Portable MIMO Testbed and Selected Channel Measurements" doc
Ngày tải lên :
22/06/2014, 23:20
... upconverted to the desired transmission band, and sent over the Nt transmit antennas The signals from the receive antennas are mixed down to baseband, sampled, and fed into the receiver The wireless ... y = φHx (10) and our capacity equation becomes CI = log2 det I + ρ φφ+ HEH+ Nt [bits/channel use] (11) and the φφ+ product is The 902–928 MHz ISM band (also denoted by 915 MHz band) was chosen ... rank) in order to study them and gain a better understanding of the advantages and limitations of MIMO communications Finally, these MIMO channel matrices can be stored and used in link level simulations...
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Fatigue and Fracture doc
Ngày tải lên :
08/07/2014, 12:20
... of the handbook will inform the reader about a particular aspect of durability, i.e., the fatigue and fracture failure mode, and about detailing for improved resistance to fatigue and fracture ... Neville Island in Pittsburgh as an example of a bridge that is sufficiently redundant to avoid collapse despite a fracture of the tension flange and the web These fatigue and fracture design and assessment ... and fracture design and assessment procedures The detailing rules are intended to avoid notches and other stress concentrations These detailing rules are useful for the avoidance of brittle fracture...
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Báo cáo vật lý: "Effect of Filler Incorporation on the Fracture Toughness Properties of Denture Base Poly(Methyl Methacrylate)" pptx
Ngày tải lên :
07/08/2014, 14:20
... from fracture toughness tests and showed that impact testing is influenced by loading conditions and specimen geometry Fracture toughness tests may be more suitable than impact strength measurements ... weak correlation between fracture toughness and filler content They observed that although the filler type, distribution and composition had a strong effect on fracture toughness, the properties ... decreased in fracture toughness by 7.9%, 6.6% and 4.8% after 1, 14 and 28 days of immersion in SBF, respectively It should also be noted that there occurred a slight reduction in fracture toughness...
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Báo cáo lâm nghiệp: "Relationships between the intra-ring wood density assessed by X-ray densitometry and optical anatomical measurements in conifers. Consequences for the cell wall apparent density determination" pps
Ngày tải lên :
08/08/2014, 01:22
... the section and straightness of the ring limits The selected widths were 3000 µm for Finland spruce, France spruce and France fir; 1500 µm for France pine and South Finland pine and 1000 µm for ... ring (North Finland pine) and from 131 up to 240 for a wider ring (South Finland pine) From these measurements (i) the mean tracheid sizes in the radial and tangential directions and (ii) the mean ... Finland spruce ring: Wood density measured by X-ray and calculated from the cell wall proportion (rectangular and hexagonal model) and a cell wall density of 1530 kg/m³ Table V Planimetric and...
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Fatigue and Fracture in an Aircraft Engine Pylon pdf
Ngày tải lên :
08/08/2014, 13:20
... Pratt and Whitney, El Al, airworthiness authorities from Israel, the Netherlands and USA, accident investigation boards from the UK and USA, the Technion Israel Institute of Technology and the ... fatigue and fracture of components connecting the pylon to the wing These components were high strength steel lugs and two "fuse pins" One fuse pin was not recovered, but the other one and the ... the most probable cause and sequence of damage leading to separation NLR TECHNICAL PUBLICATION TP 96719 U FATIGUE AND FRACTURE IN AN AIRCRAFT ENGINE PYLON by R.J.H Wanhill and A Oldersma This paper...
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Báo cáo y học: "Progress in osteoporosis and fracture prevention: focus on postmenopausal women" ppsx
Ngày tải lên :
09/08/2014, 14:22
... No Saag and Geusens Figure Risk of first and subsequent fracture over time (a) Percentage of all first fractures from menopause onwards (grey line) and fractures subsequent to initial fractures ... of a vertebral fracture, repeat low trauma fractures in subjects older than 60 years, repeat clinical vertebral and nonvertebral fractures from menopause onwards, and repeat hip fractures [9-12] ... vertebral fractures: an opportunity to identify high-risk patients Vertebral fractures are a special group of fractures Morphometric vertebral fractures are the most frequent fractures in women and...
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Báo cáo y học: " Combined forced oscillation and forced expiration measurements in mice for the assessment of airway hyperresponsiveness" pot
Ngày tải lên :
12/08/2014, 11:22
... breaths/min and tidal volume of 10 ml/kg against a positive end expiratory pressure (PEEP) of cmH2O Experimental Setup To permit NPFE and FOT measurements in the same setup, we extended a standard ... with a reservoir pressure of -55 cmH2O and a PEEP of cmH2O Assessment of allergen-induced airway hyperresponsiveness by FOT and NPFE Following DI and baseline measurements, saline solution was delivered ... curves from ovalbumin-sensitized and sham-challenged mice (A) and ovalbumin-sensitized and challenged mice (B) at varying negative pressures Values are mean ± standard deviation from groups of...
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Báo cáo y học: "(Sub)clinical cardiovascular disease is associated with increased bone loss and fracture risk; a systematic review of the association between cardiovascular disease and osteoporosis" ppsx
Ngày tải lên :
12/08/2014, 15:22
... = 0.001) 194 100% BMD lumbar spine and hip by DXA Prevalent vertebral fracture IMT and prevalent plaque BMD and IMT: NS BMD and plaque: NS Vertebral fracture and plaque: OR: 2.8 (95% CI 1.17 to ... disease and BMD hip: OR: PAD by ABI 1.22 (95% CI 1.03 to 1.43) PAD and BMD hip: NS Men: Prevalent CV disease and BMD hip: NS PAD and BMD hip: OR: 1.39 (95% CI 1.03 to 1.84) 260 BMD and IMT: NS BMD and ... Lumbar spine and hip by DXA IMT and PWV BMD spine and IMT: r -.025 (P = 0.26) BMD hip and IMT: r-0.17 (NS) BMD and PWV: NS Mangiafico, 2008 [57] Clinicbased 182 100% BMD lumbar spine and hip DXA...
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Effect of Fracture Dip and Fracture Tortuosity on Petrophysical Evaluation of Naturally Fractured Reservoirs
Ngày tải lên :
04/10/2014, 22:10
... combinations of matrix and fractures or matrix and nonconnected vugs The non-connected vugs and matrix equations were validated using core data published by Lucia.8 The fractures and matrix equations ... account variations in fracture dip and fracture tortuosity can lead in some cases to significant errors in the calculations of the dual porosity exponent, m, of matrix and fractures; and water saturation ... inverse of conductivity, equations A-2 and A-3 can be re-written in more standard oil and gas notation as: Roθ = 90 − mb Equations A-9 and A-10 assume that the fracture porosity exponent, mf, is...
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Strength, plasticity, and fracture of bulk metallic glasses
Ngày tải lên :
14/09/2015, 08:43
... unstable behavior of shear banding by forming one dominant shear band, and (b) 159000 N/mm, exhibiting a stable behavior of shear banding by forming dense shear bands, and thus uniform deformation, ... index of shear band for plasticity in metallic glasses Acta Materialia, 2009, 57: 1367 Z Han and Y Li Cooperative shear and catastrophic fracture of bulk metallic glasses from a shear-band instability ... structural materials High hardness Cutting materials High fracture toughness Die materials High impact fracture energy Tool materials High fatigue strength Bonding materials High elastic energy Sporting...
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Biaxial multiaxial fatigue and fracture
Ngày tải lên :
07/04/2017, 15:45
... Marquis, A Siljander and S Sipila Mis-Matching of Welds Edited by K.-H Schwalbe and M KoCak Fretting Fatigue Edited by R.B Waterhouse and T.C Lindley Impnct of Dynamic Fracture of Polymers and Composites ... Fatigue and Fracture lSBN 008-043336-7 Edited by E Macha, W Bqdkowski and T aagoda Fracture Mechanics: Applications and Challenges ISBN 008-043699-4 Edited by M Fuentes, M Elices, A Martin-Meizoso and ... WELDED STRUCTURES BiaxiallMultiaxial Fatigue and Fracture Andrea Carpinteri, Manuel de Freitas and Andrea Spagnoli (Eds.) Q Elsevier Science Ltd and ESIS All rights reserved ASSESSMENT OF WELDED...
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Riverbank filtration: removal of iron, manganese and hardness
Ngày tải lên :
05/09/2013, 08:40
... drinking water criteria but UTC-60 and NTR29-HF incongruent in the standard in manganese and total hardness Also UTC-20, NTR729-HF membrane could possible magnesium hardness 40 mg/L that is industrial ... V B., Maureen J K., Andrew W S and David A R., Kinetics of manganese and iron oxidation by potassium permanganate and chlorine dioxide, Jour AWWA, 83, 80-87, 1991 Jimbo Y and Goto K., Studies ... without MnO2 slurry Conclusion In hardness removal experiment by membrane, flux of UTC-20 in permeate flux and total hardness removal 0.069 m3/m2/hr that was median value and 93% of removal efficiency...
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Automation of Call Setup in IP Telephony for Tests and Measurements
Ngày tải lên :
30/09/2013, 07:20
... rate interface links NTS stands for network time server; it provides timing information (clock) to the IP domain network elements such as IP-PSTN GWs, GK, and NIST-Net, and if needed, it can derive ... phone Figure B-1 also shows where and how (i.e., using what types of links) various kinds of test equipment are connected to support di¤erent types of tests and measurements A detailed description ... hardware and software configuration and capacity of the GW A set of HVB [1] language-based scripts that can perform both of the above functions is presented in this appendix The proposed technique and...
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