scholarly journals Influence of dynamic non-equilibrium processes on strength and plasticity of materials of transportation systems

Transport ◽  
2017 ◽  
Vol 33 (1) ◽  
pp. 231-241 ◽  
Author(s):  
Mykola Chausov ◽  
Andriy Pylypenko ◽  
Valentyn Berezin ◽  
Kateryna Volyanska ◽  
Pavlo Maruschak ◽  
...  
Keyword(s):  
Material Properties ◽  
Transportation Systems ◽  
Initial Structure ◽  
Equilibrium Processes ◽  
Deformation And Fracture ◽  
Aircraft Material ◽  
Equilibrium Process ◽  
Strength And Plasticity ◽  
Fracture Of Materials ◽  
Non Equilibrium

New experimental results on the effect of additional force impulse loading on the variation of the initial structure of the aircraft material (alloys D16, 2024-T3, VT22) at various stages of deformation are presented and a significant enhancement of its initial plasticity is achieved. Complex investigations into the material properties after a dynamic non-equilibrium process made it possible to describe the main regularities in the nature of deformation and fracture of materials, which allowed proposing general recommendations on using the revealed physical and mechanical regularities in the evaluation of strength of aircraft structures.

Self-Organisation of the Heat Resistant Steel Structure Following Dynamic Non-Equilibrium Processes

2015 ◽  
Vol 220-221 ◽  
pp. 917-921 ◽  
Author(s):  
Mykola Chausov ◽  
Pavlo Maruschak ◽  
Olegas Prentkovskis ◽  
Andriy Pylypenko ◽  
Valentyn Berezin ◽  
...  
Keyword(s):  
Dissipative Structure ◽  
Steel Structure ◽  
Image Correlation ◽  
Experimental Methodology ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Equilibrium Processes ◽  
Equilibrium Process ◽  
Non Equilibrium

Using an original experimental methodology and software for contactless investigation into strains applying the method of digital image correlation, conditions for DNP realization in the test setup with pre-set rigidity have been found. Strain velocities have been determined to be equal to 2...10 s–1 in the processes of forming and developing a dissipative structure of heat resistant steel under the DNP (dynamic non-equilibrium process).

The Danger of Self-Organizing Structures in Materials Subjected to Dynamical Non-Equilibrium Processes

2013 ◽  
Vol 577-578 ◽  
pp. 525-528 ◽  
Author(s):  
Volodymyr Hutsaylyuk ◽  
Lucjan Śnieżek ◽  
Mykola Czausow ◽  
Valentin Berezin ◽  
Andriy Pylypenko
Keyword(s):  
Critical Parameter ◽  
Coarse Grained ◽  
Self Organization ◽  
Initial Structure ◽  
Fine Grained ◽  
Nano Structures ◽  
Equilibrium Processes ◽  
Properties Of Materials ◽  
Aluminum Alloy 2024 ◽  
Non Equilibrium

Researched the effect of DNP on mechanical properties of materials with a coarse-grained and fine-grained initial structure of aluminum alloy 2024 - T3, D16 and nano-crystallite titanium VT1-0. It has been shown that self-organization of structures at dynamic non-equilibrium processes is a critical parameter for materials with a nano-structures, since it significantly reduces the strength at the subsequent loading.

CONDITIONS OF MINIMAL LOSS OF EXERGY IN NON-EQUILIBRIUM PROCESSES OF ACTUATING MEDIUMS HEAT EXCHANGE

2017 ◽  
pp. 30-34
Author(s):  
V.P. Bondar
Keyword(s):  
Heat Exchange ◽  
Entropy Production ◽  
Temperature Difference ◽  
Irreversible Processes ◽  
Minimum Entropy ◽  
Equilibrium Processes ◽  
Minimum Entropy Production ◽  
Equilibrium Process ◽  
Internal Irreversibility ◽  
Non Equilibrium

Heat exchange of actuating mediums in heat-exchanging apparatuses runs non-equilibrium (irreversibly), causing loss of operational part of heat. Two types of non-equilibrium process are distinguished: external and internal. External irreversibility is function of average temperature difference (irreversibility degree) and relation of incomplete recuperation on heat exchange boards of actuating mediums. Nature of internal non-equilibrium processes is related to friction work of actuating mediums that are practically impossible to be taken into account and described analytically. In this article, in order to define conditions of change of current temperature difference by exponential law, external and internal irreversibility are reviewed both mutual and separately. Change of current temperature difference by exponent is one of conditions of minimal numeric value of entropy production of system in non-equilibrium processes of actuating mediums heat exchange existence. Analysis, performed in article, along with example, are evidence that at all types of irreversible processes of actuating mediums heat-exchange, exist conditions of gaining the numeric value of minimum entropy production and exergy losses. Bibl. 8, Fig. 1.

scholarly journals Universal and Programmable Thinning and Thickening of Topologically-Active DNA Fluids

2021 ◽  
Author(s):  
Davide Michieletto ◽  
Philip Neill ◽  
Simon Weir ◽  
Vincent Arnaud Martinez ◽  
David Evans ◽  
...  
Keyword(s):  
Material Properties ◽  
Fundamental Problem ◽  
Enzymatic Reactions ◽  
Active Materials ◽  
Polymeric Fluids ◽  
Circular Dna ◽  
New Class ◽  
Naturally Occurring ◽  
Equilibrium Process ◽  
Non Equilibrium

Understanding and controlling the rheology of polymeric fluids that are out-of-equilibrium is a fundamental problem in biology and industry. For example, to package, repair, and replicate DNA, cells use enzymes to constantly manipulate DNA topology, length, and structure. Inspired by this impressive feat, we combine experiments with theory and simulations to show that complex fluids of entangled DNA display a rich range of non-equilibrium material properties when undergoing enzymatic reactions that alter their topology and size. We reveal that while enzymatically-active fluids of linear DNA display universal viscous thinning, circular DNA fluids - undergoing the same non-equilibrium process - display thickening with a rate and degree that can be tuned by the DNA and enzyme concentrations. Our results open the way for the topological functionalization of DNA-based materials via naturally occurring enzymes to create a new class of "topologically-active" materials that can autonomously alter their rheological properties in a programmable manner.

Multiplexed Laser Induced Fluorescence and Non-Equilibrium Processes in Arcjets.

1994 ◽  
Author(s):  
Dennis Keefer ◽  
Robert Rhodes ◽  
Trevor Moeller ◽  
David Burtner
Keyword(s):  
Laser Induced Fluorescence ◽  
Equilibrium Processes ◽  
Non Equilibrium

scholarly journals Tunable thermo-reversible bicontinuous nanoparticle gel driven by the binary solvent segregation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuyin Xi ◽  
Ronald S. Lankone ◽  
Li-Piin Sung ◽  
Yun Liu
Keyword(s):  
Phase Separation ◽  
Domain Size ◽  
Binary Solvent ◽  
Colloidal Systems ◽  
Colloidal Assembly ◽  
Structures And Properties ◽  
Wide Range ◽  
Equilibrium Process ◽  
Equilibrium Structures ◽  
Non Equilibrium

AbstractBicontinuous porous structures through colloidal assembly realized by non-equilibrium process is crucial to various applications, including water treatment, catalysis and energy storage. However, as non-equilibrium structures are process-dependent, it is very challenging to simultaneously achieve reversibility, reproducibility, scalability, and tunability over material structures and properties. Here, a novel solvent segregation driven gel (SeedGel) is proposed and demonstrated to arrest bicontinuous structures with excellent thermal structural reversibility and reproducibility, tunable domain size, adjustable gel transition temperature, and amazing optical properties. It is achieved by trapping nanoparticles into one of the solvent domains upon the phase separation of the binary solvent. Due to the universality of the solvent driven particle phase separation, SeedGel is thus potentially a generic method for a wide range of colloidal systems.

Additional Non Equilibrium Processes in the Dynamic Interaction between Flux Quanta and Defects

2006 ◽  
Author(s):  
S. Pace ◽  
G. Filatrella ◽  
G. Grimaldi ◽  
A. Nigro ◽  
M. G. Adesso
Keyword(s):  
Dynamic Interaction ◽  
Equilibrium Processes ◽  
Non Equilibrium

scholarly journals Interplay of structural and dynamical heterogeneity in the nucleation mechanism in Ni

2021 ◽  
Author(s):  
Grisell Díaz Leines ◽  
Angelos Michaelides ◽  
Jutta Rogal
Keyword(s):  
High Performance ◽  
Nucleation Mechanism ◽  
Metal Alloys ◽  
Crystal Nucleation ◽  
Dynamical Heterogeneity ◽  
Fundamental Understanding ◽  
Equilibrium Process ◽  
Non Equilibrium

Gaining fundamental understanding of crystal nucleation processes in metal alloys is crucial for the development and design of high-performance materials with targeted properties. Yet, crystallizationis a complex non-equilibrium process and,...

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