Anisotropic surface strain in single crystalline cobalt nanowires and its impact on the diameter-dependent Young's modulus

Nanoscale ◽  
2013 ◽  
Vol 5 (23) ◽  
pp. 11643 ◽  
Author(s):  
Xiaohu Huang ◽  
Guanghai Li ◽  
Ling Bing Kong ◽  
Yi Zhong Huang ◽  
Tom Wu
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Surface Strain ◽  
Single Crystalline ◽  
Anisotropic Surface ◽  
Cobalt Nanowires

scholarly journals The effect of processing parameters on the mechanical characteristics of PLA produced by a 3D FFF printer

2020 ◽  
Vol 111 (3-4) ◽  
pp. 695-709
Author(s):  
H. Gonabadi ◽  
A. Yadav ◽  
S. J. Bull
Keyword(s):  
Tensile Strength ◽  
Young’S Modulus ◽  
Process Parameters ◽  
Mechanical Response ◽  
Complex Geometry ◽  
Young's Modulus ◽  
Laminate Plate ◽  
Surface Strain ◽  
Image Correlation ◽  
Build Orientation

Abstract 3D printing by fused filament fabrication (FFF) provides an innovative manufacturing method for complex geometry components. Since FFF is a layered manufacturing process, effects of process parameters are of concern when plastic materials such as polylactic acid (PLA), polystyrene and nylon are used. This study explores how the process parameters, e.g. build orientation and infill pattern/density, affect the mechanical response of PLA samples produced using FFF. Digital image correlation (DIC) was employed to get full-field surface-strain measurements. The results show the influence of build orientation and infill density is significant. For on-edge orientation, the tensile strength and Young’s modulus were 55 MPa and 3.5 GPa respectively, which were about 91% and 40% less for the upright orientation, demonstrating a significant anisotropy. The tensile strength and Young’s modulus increased with increasing infill density. In contrast, different infill patterns have no significant effect. Considering the influence of build orientation, based on the experimental results, a constitutive model derived from the laminate plate theory was employed. The material parameters were determined by tensile tests. Results demonstrated a reasonable agreement between the experimental data and the predictive model. Similar anisotropy to tension was observed in shear tests; shear modulus and shear strength for 45° flat orientation were about 1.55 GPa and 36 MPa, whereas for upright specimens they were about 0.95 GPa and 18 MPa, respectively. The findings provide a framework for systematic mechanical characterisation of 3D-printed polymers and potential ways of choosing process parameters to maximise performance for a given design.

327 On Young's Modulus and Yield Stress of Single Crystalline Al Microwires

2012 ◽  
Vol 2012.20 (0) ◽  
pp. _327-1_-_327-2_
Author(s):  
Hironori TOHMYOH ◽  
Md. Abdus Salam AKANDA ◽  
Yuki NOBE ◽  
Masumi SAKA
Keyword(s):  
Yield Stress ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Single Crystalline

scholarly journals Development of Single Crystalline Bone Plate with Low Young’s Modulus Using Beta-type Ti-15Mo-5Zr-3Al Alloy

2015 ◽  
Vol 101 (9) ◽  
pp. 501-505 ◽  
Author(s):  
Mitsuharu Todai ◽  
Koji Hagihara ◽  
Takuya Ishimoto ◽  
Kengo Yamamoto ◽  
Takayoshi Nakano
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Bone Plate ◽  
Single Crystalline

scholarly journals Nanomechanics of Single Crystalline Tungsten Nanowires

2008 ◽  
Vol 2008 ◽  
pp. 1-9 ◽  
Author(s):  
Volker Cimalla ◽  
Claus-Christian Röhlig ◽  
Jörg Pezoldt ◽  
Merten Niebelschütz ◽  
Oliver Ambacher ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Lateral Force ◽  
Mechanical Tests ◽  
Electron Back Scatter Diffraction ◽  
Directionally Solidified ◽  
Single Crystalline ◽  
Chemical Release ◽  
High Flexibility

Single crystalline tungsten nanowires were prepared from directionally solidified NiAl-W alloys by a chemical release from the resulting binary phase material. Electron back scatter diffraction (EBSD) proves that they are single crystals having identical crystallographic orientation. Mechanical investigations such as bending tests, lateral force measurements, and mechanical resonance measurements were performed on 100–300 nm diameter wires. The wires could be either directly employed using micro tweezers, as a singly clamped nanowire or in a doubly clamped nanobridge. The mechanical tests exhibit a surprisingly high flexibility for such a brittle material resulting from the small dimensions. Force displacement measurements on singly clamped W nanowires by an AFM measurement allowed the determination of a Young's modulus of 332 GPa very close to the bulk value of 355 GPa. Doubly clamped W nanowires were employed as resonant oscillating nanowires in a magnetomotively driven resonator running at 117 kHz. The Young's modulus determined from this setup was found to be higher 450 GPa which is likely to be an artefact resulting from the shift of the resonance frequency by an additional mass loading.

Experimental measurement of Young’s modulus from a single crystalline cementite

2014 ◽  
Vol 82 ◽  
pp. 25-28 ◽  
Author(s):  
Bon-Woong Koo ◽  
Young Jin Chang ◽  
Seung Pyo Hong ◽  
Chan Soon Kang ◽  
Shin Woong Jeong ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Experimental Measurement ◽  
Young's Modulus ◽  
Single Crystalline

scholarly journals Experimental Measurement of Young’s Modulus from a Single Crystalline Cementite

2014 ◽  
Vol 20 (S3) ◽  
pp. 1474-1475
Author(s):  
Bon-Woong Koo ◽  
Young Jin Chang ◽  
Seung Pyo Hong ◽  
Chan Soon Kang ◽  
Shin Woong Jeong ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Experimental Measurement ◽  
Young's Modulus ◽  
Single Crystalline

scholarly journals Effects of Bone Young’s Modulus on Finite Element Analysis in the Lateral Ankle Biomechanics

2013 ◽  
Vol 10 (4) ◽  
pp. 189-195 ◽  
Author(s):  
W. X. Niu ◽  
L. J. Wang ◽  
T. N. Feng ◽  
C. H. Jiang ◽  
Y. B. Fan ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Computational Simulation ◽  
Element Model ◽  
Surface Strain ◽  
Element Analysis

Finite element analysis (FEA) is a powerful tool in biomechanics. The mechanical properties of biological tissue used in FEA modeling are mainly from experimental data, which vary greatly and are sometimes uncertain. The purpose of this study was to research how Young’s modulus affects the computations of a foot-ankle FEA model. A computer simulation and an in-vitro experiment were carried out to investigate the effects of incremental Young’s modulus of bone on the stress and strain outcomes in the computational simulation. A precise 3-dimensional finite element model was constructed based on an in-vitro specimen of human foot and ankle. Young’s moduli were assigned as four levels of 7.3, 14.6, 21.9 and 29.2 GPa respectively. The proximal tibia and fibula were completely limited to six degrees of freedom, and the ankle was loaded to inversion 10° and 20° through the calcaneus. Six cadaveric foot-ankle specimens were loaded as same as the finite element model, and strain was measured at two positions of the distal fibula. The bone stress was less affected by assignment of Young’s modulus. With increasing of Young’s modulus, the bone strain decreased linearly. Young’s modulus of 29.2 GPa was advisable to get the satisfactory surface strain results. In the future study, more ideal model should be constructed to represent the nonlinearity, anisotropy and inhomogeneity, as the same time to provide reasonable outputs of the interested parameters.

scholarly journals Young’s Modulus of Single Crystalline Iron and Elastic Stiffness

2020 ◽  
Vol 106 (9) ◽  
pp. 679-682
Author(s):  
Setsuo Takaki ◽  
Takuro Masumura ◽  
Toshihiro Tsuchiyama
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Elastic Stiffness ◽  
Single Crystalline
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