PubAg

Main content area

You searched for: Subject "deformation" Remove constraint Subject: "deformation"
Start Over

Search

9,148  Search Results

« Previous | 1 - 20 of 9,148 |
Number of results to display per page

Search Results

1. Effect of the grain boundary character distribution on the self-organization of adiabatic shear bands in 1Cr18Ni9Ti austenitic stainless steel

Author:
Yang, Yang; Lian, Xiaolong; Wang, Junliang
Source:
Journal of materials science 2019 v.54 no.9 pp. 7256-7270
ISSN:
0022-2461
Subject:
deformation,   etc   ; microscopy; stainless steel;     Show all 3 Subjects
Abstract:
... The self-organization of adiabatic shear bands (ASBs) in the steel with a different grain boundary character distribution (GBCD) was investigated using the radial collapse of thick-walled cylinders. GBCD of 1Cr18Ni9Ti austenitic stainless steel was optimized by thermo-mechanical treatment. The results showed that the proportion of special grain boundaries, especially the Σ3 grain boundaries, were ...
DOI:
10.1007/s10853-019-03377-z

2. Light-induced shape morphing of thin films

Author:
Kuenstler, Alexa S.; Hayward, Ryan C.
Source:
Current opinion in colloid & interface science 2019 v.40 pp. 70-86
ISSN:
1359-0294
Subject:
deformation,   etc   ; lighting; optics; photochemistry;     Show all 4 Subjects
Abstract:
... Shape transformation of thin two-dimensional sheets into three-dimensional structures using light is of great interest for remotely controlled fabrication, surface modulation, and actuation. Over the last few decades, significant efforts have been made to develop material systems incorporating photochemical or photothermal elements to drive deformation in response to illumination. However, the ful ...
DOI:
10.1016/j.cocis.2019.01.009

3. Interaction between pile groups and thrust faults in a physical sandbox and numerical analysis

Author:
Li, Chien-Hung; Lin, Ming-Lang; Huang, Wen-Chao
Source:
Engineering geology 2019 v.252 pp. 65-77
ISSN:
0013-7952
Subject:
deformation,   etc   ; earthquakes; models; soil;     Show all 4 Subjects
Abstract:
... For a bridge that straddles a fault line, its pile group foundation can tilt or even fail during an earthquake event. A small-scale physical sandbox experiment is performed in this study to model a pile group subjected to thrust faulting, and particle flow code (PFC3D) is adopted for numerical analysis. The numerical analysis results are in good agreement with the sandbox test results with regard ...
DOI:
10.1016/j.enggeo.2019.02.023

4. Aerodynamic shape optimization of a single turbine stage based on parameterized Free-Form Deformation with mapping design parameters

Author:
Li, Lei; Jiao, Jiangkun; Sun, Shouyi; Zhao, Zhenan; Kang, Jialei
Source:
Energy 2019 v.169 pp. 444-455
ISSN:
0360-5442
Subject:
deformation,   etc   ; aerodynamics; energy; turbines;     Show all 4 Subjects
Abstract:
... A parameterized Free-Form Deformation (FFD) method with mapping design parameters for aerodynamic shape optimization of turbine is developed. According to the expanded feature of aerodynamic analysis grid in the spanwise direction, 3D control volume for mesh deformation of aerodynamic analysis grid is decomposed into a number of 2D control planes at different blade heights. The 2D control plane is ...
DOI:
10.1016/j.energy.2018.12.031

5. Single-Layer Metasurfaces as Spectrally Tunable Terahertz Half- and Quarter-Waveplates

Author:
Lee, Seojoo; Kim, Won Tae; Kang, Ji-Hun; Kang, Bong Joo; Rotermund, Fabian; Park, Q-Han
Source:
ACS applied materials & interfaces 2019 v.11 no.8 pp. 7655-7660
ISSN:
1944-8252
Subject:
deformation,   etc   ; polydimethylsiloxane; spectroscopy;     Show all 3 Subjects
Abstract:
... We propose a single-layer terahertz metasurface that acts as an efficient terahertz waveplate, providing phase retardation of up to 180° with a tunable operation frequency. Designed with the tight coupling of elementary resonators, our metasurface provides extraordinarily strong hyperbolicity that is closely associated with the distance between resonators, enabling both significant phase retardati ...
DOI:
10.1021/acsami.8b21456

6. Effects of tectonic stress environment on tectonophysical features of deformed coal

Author:
Lin, Chen
Source:
International journal of green energy 2019 v.16 no.2 pp. 185-199
ISSN:
1543-5083
Subject:
deformation,   etc   ; bedrock; coal; tectonics;     Show all 4 Subjects
Abstract:
... To study the effects of the tectonic stress environment on the tectonophysical features of deformed coal, No.8 Mine in the Pingdingshan mine area is used as a study area and the relationship between the development of deformed coal, distribution of fractures, formation of deformed coal and tectonic stress environment are analyzed. The results indicate that the thickness of the bedrock layer should ...
DOI:
10.1080/15435075.2018.1552588

7. Structural and electronic properties of nanotubes constructed from fragmented fullerenes

Author:
Silva, Paloma Vieira; Gomes de Souza Filho, Antônio; Meunier, Vincent; Girão, Eduardo Costa
Source:
Carbon 2019 v.147 pp. 616-627
ISSN:
0008-6223
Subject:
deformation,   etc   ; electric field; fullerene; nanotubes;     Show all 4 Subjects
Abstract:
... 2D fullerene-based carbon nanostructures have been recently proposed theoretically. They are conceptually formed by the arrangement of fragments resulting from the unzipping of C60 molecules. Depending on the details of the assembly, these layer materials exhibit either semiconducting or metallic behavior. Here, we investigate the structural and electronic properties of achiral nanotubes by means ...
DOI:
10.1016/j.carbon.2019.02.069

8. Microstructural evolution in titanium matrix composites processed by multi-pass equal-channel angular pressing

Author:
Xiang, Juan; Han, Yuanfei; Huang, Guangfa; Le, Jianwen; Chen, Yue; Xiao, Lv; Lu, Weijie
Source:
Journal of materials science 2019 v.54 no.10 pp. 7931-7942
ISSN:
0022-2461
Subject:
deformation,   etc   ; crystallization; microstructure; pressing; titanium;     Show all 5 Subjects
Abstract:
... In this study, in situ (TiB + La₂O₃)/Ti–6Al–4V composites were processed by equal-channel angular pressing (ECAP) from 1 to 3 passes, and the microstructural evolution was quantitatively investigated. The results show that dislocation slip and recombination are the main formation mechanisms of the ultrafine-grained structure. Geometrically necessary boundaries (~ 200 nm) and incidental dislocation ...
DOI:
10.1007/s10853-019-03419-6

9. On the work hardening of titanium: new insights from nanoindentation

Author:
Fitzner, Arnas; Palmer, Jack; Gardner, Ben; Thomas, Matthew; Preuss, Michael; da Fonseca, Joao Quinta
Source:
Journal of materials science 2019 v.54 no.10 pp. 7961-7974
ISSN:
0022-2461
Subject:
deformation,   etc   ; alloys; aluminum; hardness; titanium;     Show all 5 Subjects
Abstract:
... Nanoindentation was used to probe the local slip resistance in CP-Ti deformed in compression to different extents. Changes in hardness in the deformed grains and twins were compared with the change in flow stress measured during deformation, with the aim to elucidate the relative contribution of slip and twinning to the work hardening of Ti alloys. The hardness values were calibrated with measurem ...
DOI:
10.1007/s10853-019-03431-w

10. Slow episodic movement driven by elevated pore-fluid pressures in shallow subaqueous slopes

Author:
Carey, J.M.; Crutchley, G.J.; Mountjoy, J.J.; Petley, D.N.; McSaveney, M.J.; Lyndsell, B.
Source:
Geomorphology 2019 v.329 pp. 99-107
ISSN:
0169-555X
Subject:
deformation,   etc   ; landslides; nitrogen; New Zealand;     Show all 4 Subjects
Abstract:
... Subaqueous slopes are susceptible to a broad range of failure mechanisms and deformation styles, many of which are not well characterised. We undertook novel laboratory-based testing using a Dynamic Back-Pressured Shearbox on samples collected from an area subject to ongoing slope failures, situated on the upper slope of New Zealand's Hikurangi Margin, to determine how increases in pore water and ...
DOI:
10.1016/j.geomorph.2018.12.034

11. Mechanical signature and full-field measurement of flow-induced large in-plane deformation of fibrous reinforcements in composite processing

Author:
Hautefeuille, A.; Comas-Cardona, S.; Binetruy, C.
Source:
Composites 2019 v.118 pp. 213-222
ISSN:
1359-835X
Subject:
deformation,   etc   ; composite materials; liquids; nomogram;     Show all 4 Subjects
Abstract:
... During compression of saturated fibrous reinforcement, the flow of the liquid can, under certain conditions, generate fiber-tows washout (in-plane movement of fiber-tows) due to the strong hydrodynamically induced force on the fibrous reinforcement. The objective of the study is first to detect experimentally the onset and measure the full-field magnitude of the flow-induced in-plane deformation o ...
DOI:
10.1016/j.compositesa.2018.12.030

12. The build-up of detergent agglomerates in an auger filler

Author:
Hewitt, C.D.; Smith, D.J.; Greenwood, R.W.; Ingram, A.
Source:
Powder technology 2019 v.344 pp. 628-635
ISSN:
0032-5910
Subject:
plastic deformation,   etc   ; detergents; fouling; powders;     Show all 4 Subjects
Abstract:
... Powder build-up formation is a fouling process in which a small fraction of a powder becomes a coherent, non-porous, film adhered to a surface known as build-up. Build-up tends to form in auger fillers where particles undergo plastic deformation, leading to the formation of build-up on the internal surface of the tube within which the auger is housed. To develop an understanding regarding the proc ...
DOI:
10.1016/j.powtec.2018.12.046

13. Study on seismic isolation measures for cross-fault embankment

Author:
Qu, Honglue; Liu, Ying; Zhang, Bingkun; Hu, Qindi; Zhang, Junwei
Source:
Environmental earth sciences 2019 v.78 no.4 pp. 105
ISSN:
1866-6280
Subject:
deformation,   etc   ; geophysics; mathematical models; soil;     Show all 4 Subjects
Abstract:
... Under the movement of fault, embankment can produce uneven displacement, deformation and even destruction. Consequently, it is necessary to adopt appropriate seismic measures to reduce the deformation or damage of embankment with the fault displacement. In view of this, the dynamic response of a cross-fault embankment with raft foundation as a seismic isolation measure was simulated by ABAQUS in t ...
DOI:
10.1007/s12665-019-8100-z

14. Unraveling Dynamics of Entangled Polymers in Strong Extensional Flows

Author:
Moghadam, Soroush; Saha Dalal, Indranil; Larson, Ronald G.
Source:
Macromolecules 2019 v.52 no.3 pp. 1296-1307
ISSN:
1520-5835
Subject:
deformation,   etc   ; algorithms; equations; models; polymers;     Show all 5 Subjects
Abstract:
... The traditional Doi–Edwards tube model, applied to extensional flows at strain rates above the inverse Rouse time, predicts that the tube deforms affinely, which implies that the extensional stress reaches its plateau as soon as the chain has become locally fully stretched, even if the chain is still folded, and far from being completely unraveled. By starting from a state in which the chain is in ...
DOI:
10.1021/acs.macromol.8b02308

15. Effects of a simulated gap on anisotropic swelling pressure of compacted GMZ bentonite

Author:
Jia, Ling-Yan; Chen, Yong-Gui; Ye, Wei-Min; Cui, Yu-Jun
Source:
Engineering geology 2019 v.248 pp. 155-163
ISSN:
0013-7952
Subject:
deformation,   etc   ; anisotropy; bentonite; radioactive waste;     Show all 4 Subjects
Abstract:
... Gaomiaozi (GMZ) bentonite is a promising buffer material for Chinese high-level radioactive waste (HLW) disposal, and will be either compacted in situ or used as dense prefabricated material when constructing engineered barriers. Uniaxial compaction can induce anisotropy of the bentonite structure, resulting in anisotropic swelling. In this work, a series of swelling pressure tests were performed ...
DOI:
10.1016/j.enggeo.2018.11.018

16. Energy extraction from an articulated plate anti-motion device of a very large floating structure under irregular waves

Author:
Tay, Zhi Yung
Source:
Renewable energy 2019 v.130 pp. 206-222
ISSN:
0960-1481
Subject:
deformation,   etc   ; energy conversion; water power;     Show all 3 Subjects
Abstract:
... The deformation of a very large floating structure (VLFS) under wave action is termed hydroelastic response and can be mitigated by using various types of anti-motion devices to enhance the structures' workability. This paper focuses on the energy extraction from an articulated plate anti-motion device that is connected to a VLFS by hinges. The aim of the paper is to study the feasibility of the a ...
DOI:
10.1016/j.renene.2018.06.044

17. Large deformation of tunnels in longwall coal mines

Author:
Wang, Meng; Zheng, Dongjie; Niu, Shuangjian; Li, Wenfeng
Source:
Environmental earth sciences 2019 v.78 no.2 pp. 45
ISSN:
1866-6280
Subject:
deformation,   etc   ; coal; engineering; groundwater; models;     Show all 5 Subjects
Abstract:
... Large deformation of tunnels in longwall coal mines creates massive cracks in the surrounding rocks, which may cause groundwater loss and threaten the coal mine safety. Rock mechanical characterization is crucial for understanding the large deformation of underground openings. Based on the theoretical analysis and laboratory triaxial tests, this study aims to propose a strength degradation model o ...
DOI:
10.1007/s12665-019-8044-3

18. A PS processing framework for long-term and real-time GB-SAR monitoring

Author:
Hu, Cheng; Deng, Yunkai; Tian, Weiming; Wang, Jingyang
Source:
International journal of remote sensing 2019 v.40 no.16 pp. 6298-6314
ISSN:
1366-5901
Subject:
deformation,   etc   ; monitoring; remote sensing; synthetic aperture radar;     Show all 4 Subjects
Abstract:
... Based on the permanent scatterer (PS) technique, deformation measurements were taken in ground-based synthetic aperture radar (GB-SAR) applications. To realize long-term and real-time deformation monitoring, a PS processing framework is proposed. Firstly, a group selection framework is introduced. A certain number of GB-SAR images are selected as a group and different PS sets are selected. Secondl ...
DOI:
10.1080/01431161.2019.1590876

19. The role of pore water plays in coal under uniaxial cyclic loading

Author:
Zhong, Chunlin; Zhang, Zhenyu; Ranjith, Pathegama Gamage; Lu, Yiyu; Choi, Xavier
Source:
Engineering geology 2019 v.257 pp. 105125
ISSN:
0013-7952
Subject:
deformation,   etc   ; acoustics; coal; modulus of elasticity; shrinkage;     Show all 5 Subjects
Abstract:
... Geofluids are common in underground coal mines and have a significant influence on the deformation of coal rock, where the pore pressure of geofluids varies during swelling or shrinkage processes. In order to characterize the role of pore water in coal, the uniaxial behavior of saturated coal under cyclic compression was investigated considering different loading rates, amplitudes, and numbers of ...
DOI:
10.1016/j.enggeo.2019.05.002

20. A piecewise constitutive model, microstructure and fracture mechanism of a nickel-based superalloy 750H during high-temperature tensile deformation

Author:
Wang, Kaimeng; Jing, Hongyang; Xu, Lianyong; Han, Yongdian; Zhao, Lei; Xiao, Bo; Yang, Shangqing
Source:
Journal of materials science 2019 v.54 no.13 pp. 9775-9796
ISSN:
0022-2461
Subject:
deformation,   etc   ; microstructure; models; superalloys; temperature; texture;     Show all 6 Subjects
Abstract:
... In order to understand the high-temperature deformation behavior of a nickel-based superalloy, a range of tensile tests were carried out at 720, 750, and 780 °C with strain rates ranging from 5 × 10⁻⁵ to 5 × 10⁻³ s⁻¹. A piecewise constitutive model was applied to describe the work hardening-dynamic recovery and dynamic flow softening behaviors. The predicted flow stresses have a good agreement wit ...
DOI:
10.1007/s10853-019-03566-w