Equivalent Orthotropic Properties and Coupled Axial-Transverse Response of Beaded/Corrugated Panels

2022 ◽  
Author(s):  
Joe Schoneman ◽  
Jacob Del Toro ◽  
Robert D. Blevins ◽  
Eric Blades
Keyword(s):  
Orthotropic Properties ◽  
Transverse Response

scholarly journals Colossal anomalous Nernst effect in a correlated noncentrosymmetric kagome ferromagnet

2021 ◽  
Vol 7 (13) ◽  
pp. eabf1467
Author(s):  
T. Asaba ◽  
V. Ivanov ◽  
S. M. Thomas ◽  
S. Y. Savrasov ◽  
J. D. Thompson ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electronic Structure ◽  
Theoretical Calculations ◽  
Zero Magnetic Field ◽  
Nernst Effect ◽  
Nodal Lines ◽  
Transverse Response ◽  
Narrow Bands ◽  
Strong Spin ◽  
Anomalous Nernst Effect

The transverse voltage generated by a temperature gradient in a perpendicularly applied magnetic field, termed the Nernst effect, has promise for thermoelectric applications and for probing electronic structure. In magnetic materials, an anomalous Nernst effect (ANE) is possible in a zero magnetic field. We report a colossal ANE in the ferromagnetic metal UCo0.8Ru0.2Al, reaching 23 microvolts per kelvin. Uranium’s 5f electrons provide strong electronic correlations that lead to narrow bands, a known route to producing a large thermoelectric response. In addition, uranium’s strong spin-orbit coupling produces an intrinsic transverse response in this material due to the Berry curvature associated with the relativistic electronic structure. Theoretical calculations show that in UCo0.8Ru0.2Al at least 148 Weyl nodes, and two nodal lines, exist within 60 millielectron volt of the Fermi level. This work demonstrates that magnetic actinide materials can host strong Nernst and Hall responses due to their combined correlated and topological nature.

Transverse Response Functions in Deep-Inelastic Electron Scattering forCa40,Ca48, andFe56

1985 ◽  
Vol 54 (12) ◽  
pp. 1233-1236 ◽  
Author(s):  
Z. E. Meziani ◽  
P. Barreau ◽  
M. Bernheim ◽  
J. Morgenstern ◽  
S. Turck-Chieze ◽  
...  
Keyword(s):  
Electron Scattering ◽  
Inelastic Electron ◽  
Response Functions ◽  
Inelastic Electron Scattering ◽  
Deep Inelastic Electron ◽  
Transverse Response

scholarly journals An Analytical Procedure to Predict Transverse Vibration Response of Jack-Up Riser under the Random Wave Load

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Fengde Wang ◽  
Wensheng Xiao ◽  
Yanan Yao ◽  
Qi Liu ◽  
Changjiang Li
Keyword(s):  
Dynamic Response ◽  
Oil And Gas ◽  
Beam Theory ◽  
Random Wave ◽  
Wave Load ◽  
Main Component ◽  
Gas Leaks ◽  
Jack Up ◽  
Euler Bernoulli Beam ◽  
Transverse Response

Marine riser is a key equipment in offshore drilling operation, and failure of the riser can lead to drilling moratorium; in severe cases, it may cause oil and gas leaks. In this paper, the time-dependent boundary conditions of the riser and the randomness of wave load are considered to improve the calculation efficiency and accuracy of the dynamic response of the jack-up riser. Based on the Euler–Bernoulli beam theory, an analytical method to determine the response of the jack-up riser subjected to the random wave load was established by the Mindlin–Goodman method in the frequency domain, and an experiment was carried out to verify it. The research shows that transverse dynamic response is the main component of the transverse response of the riser, and the method proposed is feasible to calculate the transverse response of the riser.

scholarly journals Finite-temperature violation of the anomalous transverse Wiedemann-Franz law

2020 ◽  
Vol 6 (17) ◽  
pp. eaaz3522 ◽  
Author(s):  
Liangcai Xu ◽  
Xiaokang Li ◽  
Xiufang Lu ◽  
Clément Collignon ◽  
Huixia Fu ◽  
...  
Keyword(s):  
Wave Function ◽  
Inelastic Scattering ◽  
Finite Temperature ◽  
Room Temperature ◽  
Theoretical Calculations ◽  
Data Accuracy ◽  
Berry Curvature ◽  
Curvature Distribution ◽  
Open Question ◽  
Transverse Response

The Wiedemann-Franz (WF) law has been tested in numerous solids, but the extent of its relevance to the anomalous transverse transport and the topological nature of the wave function, remains an open question. Here, we present a study of anomalous transverse response in the noncollinear antiferromagnet Mn3Ge extended from room temperature down to sub-kelvin temperature and find that the anomalous Lorenz ratio remains close to the Sommerfeld value up to 100 K but not above. The finite-temperature violation of the WF correlation is caused by a mismatch between the thermal and electrical summations of the Berry curvature and not by inelastic scattering. This interpretation is backed by our theoretical calculations, which reveals a competition between the temperature and the Berry curvature distribution. The data accuracy is supported by verifying the anomalous Bridgman relation. The anomalous Lorenz ratio is thus an extremely sensitive probe of the Berry spectrum of a solid.

Advanced Oxidation Protection System for Carbon-Carbon Composites

1989 ◽  
Author(s):  
D. A. Eitman ◽  
R. W. Kidd ◽  
R. B. Dirling
Keyword(s):  
Advanced Oxidation ◽  
High Strength ◽  
Carbon Composite ◽  
Protection System ◽  
Carbon Composites ◽  
Oxidation Protection ◽  
Low Thermal Expansion ◽  
The Matrix ◽  
Strength And Stiffness ◽  
Orthotropic Properties

Carbon-carbon composites possess a number of desirable attributes including low density, high strength and stiffness at temperatures well beyond the capabilities of refractory alloys, low thermal expansion coefficient, tailorable orthotropic properties, absence of strategic materials, and resistance to thermal shock, fatigue, and brittle failures. However, for many applications of interest (such as aircraft and aerospace vehicle structure and engines) resistance to oxidation in high-temperature air or engine exhaust streams is a requirement which is not satisfied by unprotected carbon-carbon composites. The elements of an advanced oxidation protection system for carbon-carbon composites are described in this paper. The system is comprised of both an oxidation resistant coating intended to provide the primary barrier to oxygen ingress and inhibitors added to the matrix of the carbon-carbon composite to increase its oxidation resistance without significant losses in mechanical properties. The composite inhibition system is designed to be complementary to the coating and to enhance its long-term performance. A description of the principal elements of the system is presented along with recent test data and current research directions.

scholarly journals A Simplified Finite Element Approach for Modeling of Multilayer Plates

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Taiyou Liu ◽  
Xinbo Ma ◽  
Pak Kin Wong ◽  
Jing Zhao ◽  
Zhengchao Xie ◽  
...  
Keyword(s):  
Finite Element ◽  
Numerical Study ◽  
Reference Value ◽  
Fe Model ◽  
Practical Applications ◽  
Aerospace Applications ◽  
Equivalent Bending Stiffness ◽  
Element Approach ◽  
Set Up ◽  
Transverse Response

The multilayer plate has a great potential for automotive and aerospace applications. However, the complexity in structure and calculation of the response impede the practical applications of multilayer plates. To solve this problem, this work proposes a new plate finite element and a simplified finite element (FE) model for multilayer plates. The proposed new plate finite element consists of the shear and extension strains in all layers. The multilayer structure with the proposed new plate finite element is regarded as a reference to calculate the reference value of the transverse response. The simplified FE model of multilayer plates is proposed based on the equivalent bending stiffness by curve fitting of the reference value of the transverse response. Numerical study shows that this approach can be used to set up the simplified FE model of multilayer plates.

Buckling of Sandwich Panels with Laminated Face Plates

1972 ◽  
Vol 23 (2) ◽  
pp. 148-160 ◽  
Author(s):  
T R A Pearce ◽  
J P H Webber
Keyword(s):  
Carbon Fibre ◽  
Sandwich Panels ◽  
Numerical Results ◽  
Simply Supported ◽  
Face Plate ◽  
Honeycomb Cores ◽  
Orthotropic Properties ◽  
Overall Buckling

SummaryThe buckling of simply-supported sandwich panels, made up from fibre reinforced laminated face plates and honeycomb cores, is considered when they are subjected to uniform end loading. Numerical results are given for both overall buckling and face plate wrinkling for panels having typical carbon fibre faces with the laminations arranged to give effectively orthotropic properties.

A Methodology for Mechanical Measurements of Technical Constants of Trabecular Bone

1988 ◽  
Vol 17 (4) ◽  
pp. 169-173 ◽  
Author(s):  
L H Yahia ◽  
G Drouin ◽  
P Duval
Keyword(s):  
Trabecular Bone ◽  
Three Dimensional ◽  
Lumbar Vertebrae ◽  
Bony Tissue ◽  
Ultrasonic Methods ◽  
Vertebral Trabecular Bone ◽  
Young’S Moduli ◽  
Orthotropic Properties ◽  
First Time ◽  
Non Destructive

Vertebral trabecular bone was tested by non-destructive uniaxial and triaxial loadings with the purpose of investigating the orthotropic properties of bone. A triaxial testing apparatus using hydrostatic pressure was developed and allowed to characterise the bony tissue in a three-dimensional stressed state. Thirty specimens, in the form of 10 mm cubes, were tested. The Young's moduli obtained in this study for the trabecular bone of human lumbar vertebrae are found to be in agreement with the values obtained by ultrasonic methods. Analyses of triaxial compressive tests provided, for the first time, the Poisson's ratios of vertebral trabecular bone. These values are found to satisfy thermodynamic restrictions established by Cowin and Van Buskirk (1986). Finally, no significant differences in the material properties were found for segment level (L3-L4).

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