Structural hierarchy defeats alloy cracking

Science ◽  
2021 ◽  
Vol 373 (6557) ◽  
pp. 857-858
Author(s):  
Xianghai An
Keyword(s):  
Structural Hierarchy

scholarly journals A modular design method based on TRIZ and AD and its application to cutter changing robot

2021 ◽  
Vol 13 (7) ◽  
pp. 168781402110343
Author(s):  
Mei Yang ◽  
Yimin Xia ◽  
Lianhui Jia ◽  
Dujuan Wang ◽  
Zhiyong Ji
Keyword(s):  
Modular Design ◽  
Design Method ◽  
Idea Generation ◽  
Design Parameters ◽  
Problem Analysis ◽  
Concept Design ◽  
Functional Requirements ◽  
Shield Tunneling ◽  
Structural Hierarchy ◽  
And Performance

Modular design, Axiomatic design (AD) and Theory of inventive problem solving (TRIZ) have been increasingly popularized in concept design of modern mechanical product. Each method has their own advantages and drawbacks. The benefit of modular design is reducing the product design period, and AD has the capability of problem analysis, while TRIZ’s expertise is innovative idea generation. According to the complementarity of these three approaches, an innovative and systematic methodology is proposed to design big complex mechanical system. Firstly, the module partition is executed based on scenario decomposition. Then, the behavior attributes of modules are listed to find the design contradiction, including motion form, spatial constraints, and performance requirements. TRIZ tools are employed to deal with the contradictions between behavior attributes. The decomposition and mapping of functional requirements and design parameters are carried out to construct the structural hierarchy of each module. Then, modules are integrated considering the connections between each other. Finally, the operation steps in application scenario are designed in temporal and spatial dimensions. Design of cutter changing robot for shield tunneling machine is taken as an example to validate the feasibility and effectiveness of the proposed method.

Role of e-beam irradiation treatment on detemplation and structural hierarchy of ZSM-5 zeolite

2021 ◽  
Vol 315 ◽  
pp. 110928
Author(s):  
Phuong T. Ngo ◽  
Phuong N.X. Vo ◽  
Loc P. Trinh-Le ◽  
Duc T. Pham ◽  
Phuong D. Phan ◽  
...  
Keyword(s):  
Beam Irradiation ◽  
Structural Hierarchy ◽  
Irradiation Treatment

scholarly journals Self-organization of nanoparticles and molecules in periodic Liesegang-type structures

2021 ◽  
Vol 7 (16) ◽  
pp. eabe3801
Author(s):  
Amanda J. Ackroyd ◽  
Gábor Holló ◽  
Haridas Mundoor ◽  
Honghu Zhang ◽  
Oleg Gang ◽  
...  
Keyword(s):  
Constant Velocity ◽  
Periodic Structures ◽  
Reaction Diffusion ◽  
Self Organization ◽  
Reaction Diffusion Systems ◽  
Structural Hierarchy ◽  
Preparation Conditions ◽  
Diffusion Systems ◽  
Film Preparation ◽  
Self Organizing

Chemical organization in reaction-diffusion systems offers a strategy for the generation of materials with ordered morphologies and structural hierarchy. Periodic structures are formed by either molecules or nanoparticles. On the premise of new directing factors and materials, an emerging frontier is the design of systems in which the precipitation partners are nanoparticles and molecules. We show that solvent evaporation from a suspension of cellulose nanocrystals (CNCs) and l-(+)-tartaric acid [l-(+)-TA] causes phase separation and precipitation, which, being coupled with a reaction/diffusion, results in rhythmic alternation of CNC-rich and l-(+)-TA–rich rings. The CNC-rich regions have a cholesteric structure, while the l-(+)-TA–rich bands are formed by radially aligned elongated bundles. The moving edge of the pattern propagates with a finite constant velocity, which enables control of periodicity by varying film preparation conditions. This work expands knowledge about self-organizing reaction-diffusion systems and offers a strategy for the design of self-organizing materials.

scholarly journals Hierarchical ordering in light-triggered additive manufacturing

2020 ◽  
Vol 11 (46) ◽  
pp. 7316-7329
Author(s):  
Joël Monti ◽  
Eva Blasco
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Future Prospects ◽  
Structural Hierarchy ◽  
Recent Developments ◽  
Hierarchical Ordering

Herein, recent developments in the 3D printing of materials with structural hierarchy and their future prospects are reviewed. It is shown that increasing the extent of ordering, is essential to access novel properties and functionalities.

The Inheritance and Development of Dunhuang Dance to the Musical Dance Art of Dunhuang Frescoes

2021 ◽  
Vol 2 (3) ◽  
Author(s):  
Shuqin Li ◽  
Tingting Li
Keyword(s):  
Information Age ◽  
Structural Hierarchy ◽  
Interactive Display ◽  
Continuous Progress ◽  
Rich Material ◽  
The Times ◽  
Scientific Value ◽  
Material Information ◽  
Visual Interface ◽  
Information Database

Dunhuang frescoes carry the essence of millennia of civilization and are rich in historical and scientific value. In the continuous progress of history, the artistic styles of different eras have merged, and finally formed the very charming Dunhuang musical dance art, which has been widely welcomed. Under the background of the information age, people integrate digital technology with the Dunhuang fresco art of musical dance, which not only improves the preservation time of Dunhuang frescoes, but also allows this art to be presented to people and allows Dunhuang culture to be spread and inherited. The elements in the Dunhuang frescoes in our country are very rich and can be applied to all aspects. Many professionals have gradually realized its importance, and by transforming its creative vehicle, users can deeply understand and further appreciate the Dunhuang musical dance art and learn the knowledge of frescoes while experiencing the product. At the same time, based on the existing frescoes and restoration drawings created by researchers, combined with the special design principles of the product, a visual interface with a sense of structural hierarchy was designed. The classic Dunhuang fresco musical dance images are sorted out to build a rich material information database. At the same time, the interactive display is divided into different modules according to the research content of Dunhuang fresco musical dance art, and the content of the characteristics of the times, music meaning and dancing image are designed. Finally, Unity3D is used to realize the interactive display design of Dunhuang fresco musical dance art.

Characterization of nickel-based microlattice materials with structural hierarchy from the nanometer to the millimeter scale

2012 ◽  
Vol 60 (8) ◽  
pp. 3511-3523 ◽  
Author(s):  
A. Torrents ◽  
T.A. Schaedler ◽  
A.J. Jacobsen ◽  
W.B. Carter ◽  
L. Valdevit
Keyword(s):  
Structural Hierarchy

Tin-based hybrid materials with a two-level structural hierarchy

2008 ◽  
Vol 48 (1-2) ◽  
pp. 6-10 ◽  
Author(s):  
Hicham Elhamzaoui ◽  
Bernard Jousseaume ◽  
Thierry Toupance ◽  
Cécile Zakri
Keyword(s):  
Hybrid Materials ◽  
Structural Hierarchy
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