Evaluation of Young’s modulus of RE123 bulk superconductors by three point bending tests

2006 ◽  
Vol 445-448 ◽  
pp. 422-426 ◽  
Author(s):  
T. Sato ◽  
K. Katagiri ◽  
T. Hokari ◽  
Y. Hatakeyama ◽  
A. Murakami ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Bending Tests ◽  
Three Point Bending ◽  
Bulk Superconductors

scholarly journals Variation of the modulus of elasticity of aligner foil sheet materials due to thermoforming

2021 ◽  
Author(s):  
Bijan Golkhani ◽  
Anna Weber ◽  
Ludger Keilig ◽  
Susanne Reimann ◽  
Christoph Bourauel
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Modulus Of Elasticity ◽  
Young's Modulus ◽  
The Other ◽  
Bending Tests ◽  
Three Point Bending ◽  
Sheet Materials ◽  
Before And After ◽  
Lateral Walls

Abstract Objective Investigate and compare the mechanical properties of different aligner materials before and after deep drawing and determine differences in the mechanical properties after thermoforming. Materials and methods Four aligner film sheets from three manufacturers (Duran Plus® [Scheu Dental, Iserlohn, Germany]; Zendura® [ClearCorrect, Bay Materials LLC, Fremont, CA, USA]; Essix ACE® and Essix® PLUS™ [Dentsply Sirona Deutschland, Bensheim, Germany]) were tested in 3‑point bending with support distances of 8, 16, and 24 mm. Dimension of the specimens was 10 × 50 mm2. Two groups each were tested: (1) 10 specimens were investigated in the as-received state (before thermoforming), (2) 10 specimens were deep drawn on a master plate with cuboids of the dimension 10 × 10 × 50 mm3. Then, specimens were cut out of the upper side and lateral walls and were measured in 3‑point bending. Forces and reduction in thickness were measured and corrected theoretical forces of drawn sheets after thickness reduction as well as Young’s modulus were calculated. Results At a support distance of 8 mm and a displacement of 0.25 mm Essix® PLUS™, having the highest thickness in untreated state, showed highest forces of 28.2 N, followed by Duran Plus® (27.3 N), Essix ACE® (21.0 N) and Zendura® (19.7 N). Similar results were registered for the other distances (16, 24 mm). Thermoforming drastically reduced thickness and forces in the bending tests. Forces decreased to around 10% or less for specimens cut from the lateral walls. Young’s modulus decreased significantly for deep drawn foil sheets, especially for Essix® PLUS™. Conclusions Three-point bending is an appropriate method to compare different foil sheet materials. Young’s modulus is significantly affected by thermoforming.

Comparison of results obtained by static 3- and 4-point bending and flexural vibration tests on solid wood, MDF, and 5-plywood

Holzforschung ◽  
2013 ◽  
Vol 67 (8) ◽  
pp. 941-948 ◽  
Author(s):  
Hiroshi Yoshihara
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Medium Density Fiberboard ◽  
Flexural Vibration ◽  
Solid Wood ◽  
Bending Tests ◽  
Four Point Bending ◽  
Flexural Vibration Test ◽  
The Difference ◽  
Vibration Tests

Abstract The flexural Young’s modulus of western hemlock, medium-density fiberboard, and 5-plywood (made of lauan) has been determined by conducting three- and four-point bending tests with various span lengths and by flexural vibration test. The Young’s modulus was significantly influenced by the deflection measurement method. In particular, the Young’s modulus was not reliable based on the difference between the deflections at two specific points in the specimen, although this test is standardized according to ISO 3349-1975 and JIS Z2101-2009.

Young’s Modulus of Nanohoneycomb Structures According to the Porosity

2007 ◽  
Vol 334-335 ◽  
pp. 761-764
Author(s):  
D.H. Choi ◽  
C.W. Lee ◽  
P.S. Lee ◽  
J.H. Lee ◽  
W. Hwang ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Young’S Modulus ◽  
Large Range ◽  
Young's Modulus ◽  
Vertical Direction ◽  
Moment Of Inertia ◽  
Beam Length ◽  
Bending Tests ◽  
Force Microscopy ◽  
Atomic Force

Young’s modulus of nanohoneycomb structures in the vertical direction relative to the pore (generally along the beam length) is measured according to the porosity from bending tests in atomic force microscopy (AFM). The pore diameters of the nanohoneycomb structures are from about 30 to 60 nm. To determine the Young’s modulus of the nanohoneycomb structures, the area moment of inertia of the nanohoneycomb structure is determined according to the arrangement of the pores. The area moment of inertia of the nanohoneycomb structure is found to be affected by the porosity of the nanohoneycomb structures. The Young’s modulus of the nanohoneycomb structures decreases as a function of the porosity in a large range.

Elastic Strain Energy of a Nanowire in Three-Point Bending Test with the Consideration of Surface Effects

2011 ◽  
Vol 268-270 ◽  
pp. 67-71
Author(s):  
Xian Wei Zeng ◽  
Jia Quan Deng
Keyword(s):  
Young’S Modulus ◽  
Elastic Strain ◽  
Strain Energy ◽  
Young's Modulus ◽  
Elastic Strain Energy ◽  
Theoretical Models ◽  
Bending Test ◽  
Three Point Bending ◽  
Force Microscopy ◽  
Atomic Force

Three-point bending tests of nanowires with Contact atomic force microscopy reveal that the Young’s modulus of a nanowire is size-dependent. The modulus changes with the diameter of a nanowire. This size dependency can be explained within the framework of classical continuum mechanics by including the effects of surface stress. In this study, an analytical solution has been derived for the elastic strain energy of a nanowire with both ends clamped and contacted by an AFM tip at its midpoint. Different from previous theoretical models, the present model can handle the case of large deflection, where the displacement of the nanowire is in the same order of the diameter. Based on the equivalence of elastic strain energy, the apparent Young’s modulus of a nanowire is expressed as a function of the elastic modulus of the bulk and that of the surface, and the dimensions of a nanowire.

scholarly journals Material Properties of Wire for the Fabrication of Knotted Fences

2014 ◽  
Vol 2014 ◽  
pp. 1-12
Author(s):  
Dirk J. Pons ◽  
Gareth Bayley ◽  
Christopher Tyree ◽  
Matthew Hunt ◽  
Reuben Laurenson
Keyword(s):  
Tensile Strength ◽  
Young’S Modulus ◽  
Material Properties ◽  
Young's Modulus ◽  
Flexural Modulus ◽  
Test Methods ◽  
Materials Properties ◽  
Three Point Bending ◽  
Insight Into ◽  
Strength And Ductility

This paper describes the materials properties of galvanised fencing wire, as used in the fabrication of knotted wire fences. A range of physical properties are investigated: tensile strength, ductility in tension, Young’s modulus, three-point bending, and bending span. A range of commercially available wire products were tested. The results show that most, but not all, high tensile wire samples met the minimum tensile and ductility requirements. Young’s modulus results failed to provide any meaningful insights into wire quality. Flexural modulus results also failed to provide any insight into wire quality issues, with no statistically significant differences existing between acceptable and problematic wire batches. The implications are that premature fence failures are unlikely to be caused solely by reduced tensile properties. Existing test methods, including tensile strength and ductility, are somewhat incomplete, perhaps even unreliable, as measures of wire quality.

Young’s Modulus of Alumina Particles Reinforced Metal-Matrix Composite

2016 ◽  
Vol 368 ◽  
pp. 174-177
Author(s):  
Petr Haušild ◽  
Ondřej Kovářík ◽  
Kristýna Havlíková ◽  
Martina Thomasová
Keyword(s):  
Young’S Modulus ◽  
Matrix Composite ◽  
Young's Modulus ◽  
Instrumented Indentation ◽  
Internal Damage ◽  
Three Point Bending ◽  
Particle Cracking ◽  
Alumina Particles ◽  
Pulse Echo ◽  
Al Matrix Composite

Young’s modulus of alumina particles reinforced pure Al-matrix composite is characterized by different methods: the pulse-echo ultrasound method, static three point bending, resonant bending and continuous multicycle measurement by instrumented indentation. Dependency of apparent Young’s modulus on loading amplitude was observed and attributed to the local mechanical properties of both phases, especially to the development of internal damage (local plasticity and particle cracking).

scholarly journals Mechanical Researches on Young's Modulus of SCS Nanostructures

2009 ◽  
Vol 2009 ◽  
pp. 1-6 ◽  
Author(s):  
Qinhua Jin ◽  
Tie Li ◽  
Ping Zhou ◽  
Yuelin Wang
Keyword(s):  
Young’S Modulus ◽  
Surface Effect ◽  
Young's Modulus ◽  
Tensile Tests ◽  
Testing Methods ◽  
Bending Tests ◽  
Resonance Test ◽  
Experimental Errors ◽  
The Difference ◽  
Experimental Researches

Nanostructures of SingleCrystalSilicon (SCS) with superior electrical, mechanical, thermal, and optical properties are emerging in the development of novel nanodevices. Mechanical properties especially Young's modulus are essential in developing and utilizing such nanodevices. In this paper, experimental researches including bending tests, resonance tests, and tensile tests on Young' s modulus of nanoscaled SCS are reviewed, and their results are compared. It was found that the values ofEmeasured by different testing methods cannot match to each other. As the differences cannot be explained as experimental errors, it should be understood by taking surface effect into account. With a simplified model, we qualitatively explained the difference inEvalue measured by tensile test and by resonance test for Si nanobeams.

scholarly journals Estimating Young’s Modulus of Materials by a New Three-Point Bending Method

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Xiaohu Zeng ◽  
Shifeng Wen ◽  
Mingxi Li ◽  
Gongnan Xie
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Test Method ◽  
Bending Test ◽  
Contact Friction ◽  
Specimen Preparation ◽  
Test Accuracy ◽  
Theoretical Derivation ◽  
Three Point Bending ◽  
Aluminum Alloy 2024

A new test method based on the three-point bending test is put forward to measure Young’s modulus of materials. The simplified mechanical model is established to make theoretical derivation. This method has not only the advantages of simple specimen preparation and convenient loading device, but also higher precision than the traditional three-point bending method. The method is adopted to obtain Young’s modulus of the aluminum alloy 2024. The feasibility of the method has been demonstrated by comparisons with the corresponding results obtained from the finite element method and experiment method. And the influence of contact friction on the test accuracy is analyzed.

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