scholarly journals Analysis of inheritance mechanisms in animate nature and engineering

2020 ◽  
Vol 2020 (11) ◽  
pp. 16-29
Author(s):  
Andrey Krechetov ◽  
Valeriy Blyumenstein ◽  
Ludmila Zakonnova
Keyword(s):  
Surface Layer ◽  
Metal Flow ◽  
Deformation Source ◽  
Scientific Investigation ◽  
Engineering Process ◽  
Scientific Investigations ◽  
Technological Inheritance ◽  
Engineering Technique ◽  
Plastic Metal ◽  
Evolution Of Ideas

The evolution of ideas on inheritance is analyzed and basic types of inheritance in animate nature are presented. Reasoning from the analysis of terms adopted in genetics and engineering technique there is carried out the analysis of inheritance mechanisms at machining and machinery operation. There is shown the evolution of ideas on hereditary information: first the part manufactured the accuracy dimensions of which were “copied” (inherited) in the course of engineering procedure; further – a thin surface layer formed during the engineering process and within the frames of the scientific investigation carried out – material of the deformation source where a plastic metal flow takes place. An analysis is carried out and the directions of the development of scientific investigations in the field of technological inheritance are presented.

Effect of lubricant fluid on plastic metal flow in sliding contact

Wear ◽  
1985 ◽  
Vol 101 (2) ◽  
pp. 155-168
Author(s):  
Tokio Morimoto ◽  
Kentaro Tamamura
Keyword(s):  
Metal Flow ◽  
Sliding Contact ◽  
Plastic Metal

Study of Surface Layer Hardening after Treatment Complex Tool

2020 ◽  
Vol 303 ◽  
pp. 89-96
Author(s):  
K.S. Mitrofanova
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Strain State ◽  
Experimental Studies ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Technological Inheritance ◽  
Multiple Loading ◽  
Surface Layer Hardening ◽  
Solidified Body

The results of experimental studies of the thin surface layer of samples made of steel 45 after treatment with surface plastic deformation (SPD) multiradius roller (MR-roller) are presented. On the basis of the apparatus of the mechanics of technological inheritance, taking into account the effect of the solidified body, a model of the process according to the scheme of multiple loading-unloading of metal, taking into account the phenomenology of the SPD process and the properties of the material, is created. Distributions of parameters of the stress-strain state in the deformation centre are obtained, the parameters of roughness and microhardness of the surface layer are investigated.

scholarly journals CONDITIONS OF COORDINATION OF SCIENTIFIC INVESTIGATION IN THE SYSTEM OF PEDAGOGICAL POSTGRADUATE EDUCATION UNDER DECENTRALIZED MANAGEMENT

1970 ◽  
Vol 4 (3) ◽  
Author(s):  
Olena I. Bondarchuk
Keyword(s):  
Postgraduate Education ◽  
Scientific Investigation ◽  
Actual Problem ◽  
Scientific Investigations ◽  
Decentralized Management

The article is devoted to actual problem of decentralized management – coordination of scientific investigation in the system of pedagogical postgraduate education. The author analyzes the conditions of scientific investigations coordination of regional postgraduate pedagogical organizations as an important factor of effectiveness of its activity.

scholarly journals The Preliminary Exploration of Micro-Friction Stir Welding Process and Material Flow of Copper and Brass Ultra-Thin Sheets

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2401
Author(s):  
Changqing Zhang ◽  
Zhuo Qin ◽  
Chen Rong ◽  
Wenchen Shi ◽  
Shuwen Wang
Keyword(s):  
Friction Stir Welding ◽  
Flow Behavior ◽  
Pure Copper ◽  
Weld Zone ◽  
Metal Flow ◽  
Welding Process ◽  
Process Conditions ◽  
Friction Stir ◽  
Plastic Metal ◽  
Tool Pin

In the friction stir welding (FSW) of ultra-thin dissimilar metal sheets, different physical material properties, the reduction of plastic metal in the weld zone, and insufficient plastic metal flow lead to poor weld seam shapes and joint qualities. Therefore, it is necessary to study the flow behavior during the FSW of ultrathin sheets. In this study, micro friction stir welding (μFSW) was conducted and analyzed for the butt welding of 0.6-mm-thick ultrathin brass (H62-H) and pure copper (T2-Y) sheets. By analyzing the electric signals of the temperature and force during the welding process, testing the mechanical properties, and analyzing the metallography of the joint, the influences of the process parameters on the metal flow behavior during μFSW were studied. In the proper process conditions, the material preferentially migrated and concentric vortex flow occurred in the vicinity of the shoulder and tool pin action areas. The copper was pushed from the retreating side (RS) to the advancing side (AS) of the weld, allowing it to flow more fully. A mixture of both materials formed at the bottom of the weld nugget, and less migration occurred in the heat-affected zone of the AS at this time. The highest tensile strength can reach 194 MPa, accounting for 82.6% of the copper. The presence of brittle phases Cu5Zn8, AgZn3 and AgZn caused the hardness to fluctuate slightly.

scholarly journals Design guidelines for plastic casting using 3D printing

2020 ◽  
Vol 15 ◽  
pp. 155892502091603 ◽  
Author(s):  
Paweł Zmarzły ◽  
Damian Gogolewski ◽  
Tomasz Kozior
Keyword(s):  
Surface Layer ◽  
3D Printing ◽  
Textile Industry ◽  
Dimensional Accuracy ◽  
Casting Process ◽  
Design Guidelines ◽  
Design Stage ◽  
Technological Inheritance ◽  
Finished Sample

The main aim of the presented tests was to assess the possibility of using 3D printing and casting material to produce casting molds and prototypes, especially in production of existing models. The analysis was based on the assessment of dimensional accuracy and quality of the surface layer of a finished prototype and the intermediate elements made during the production process. The mold was made using the PolyJet Matrix additive technology, and then a silicone mold was cast which was used to prepare a finished sample for testing in accordance with the design assumptions. Based on the results of metrological measurements, the phenomenon of technological inheritance in terms of error transfer in the foundry industry was evaluated. The measurements obtained suggest that in case of casting process, the hereditary features are transferred from individual casting processes, which is especially prominent in the case of surface texture quality. This confirms the occurrence of the phenomenon of the so-called technological inheritance and the need to analyze it. The results of the tests can be a guide for technologists who design molds, core boxes, and casting models, concerning the corrections (shrinkage) that need to be introduced at the design stage in order to obtain a product (casting) of satisfactory dimensional accuracy and quality of the surface layer. The result can also be useful for casting materials reinforced with glass fiber, carbon fiber, which are common materials in 3D printing and textile industry.

scholarly journals History's Changing Climate: Climate Science, Genomics, and the Emerging Consilient Approach to Interdisciplinary History

2011 ◽  
Vol 42 (2) ◽  
pp. 251-273 ◽  
Author(s):  
Michael McCormick
Keyword(s):  
Climate Science ◽  
Scientific Investigation ◽  
The Other ◽  
Scientific Investigations ◽  
Changing Climate ◽  
The One

Consilience refers to the quality of investigations that draw conclusions from forms of evidence that are epistemologically distinct. The term seems particularly apt for conclusions produced by natural-scientific investigations on the one hand and by historical and archaeological studies on the other. Consilience points to areas of underlying unity of humanistic and scientific investigation— a unity arising from that of reality itself; it represents a convergence in parallel but independent investigations that results in deductions that are much more robust than any investigation would be able to produce on its own.

scholarly journals RECONSTRUCTION OF SCIENTIFIC INVESTIGATION IN INDONESIA

2018 ◽  
Vol 5 (2) ◽  
Author(s):  
Teguh Prihmono
Keyword(s):  
Proof Theory ◽  
Secondary Data ◽  
Qualitative Approach ◽  
Scientific Investigation ◽  
Primary Data ◽  
Legal Certainty ◽  
Scientific Investigations ◽  
The Ideal

The purpose of this study is to analyze the process of scientific investigation, the empowerment of scientific investigation by investigators, obstacles faced and finding scientific investigation based ideal of justice. This study uses empirical juridical approach that is related to the professional investigators and forensic laboratory examiner in conducting scientific investigations, also used a qualitative approach of the source of primary data and secondary data, then analyzed diskriftif with sestematika sentence further discussion is concluded. The problem is analyzed with proof theory and the theory of legal certainty so that it can be concluded find scientific investigation based on the ideal of justice.

Co-creating developmental science

2021 ◽  
Author(s):  
Kathryn L. Mills ◽  
Lucy Whitmore
Keyword(s):  
Lived Experiences ◽  
Scientific Research ◽  
Scientific Investigation ◽  
Research Institutions ◽  
Scientific Process ◽  
Advanced Degrees ◽  
Scientific Investigations ◽  
Developmental Science

Co-creating science with members of the researched population improves the science being conducted. Most scientific research is designed and conducted by individuals in academic or research institutions, often with advanced degrees. Of course, this is understandable given that conducting a rigorous scientific investigation takes both training and resources. However, trained researchers can team up with individuals without formalized training to conduct scientific investigations together. Here, we argue that it is time to normalize the practice of incorporating developing populations, and relevant stakeholders, in the design and interpretation of scientific research. We focus on these specific components of the scientific process given the unique strength of including the perspectives of individuals with lived experiences in scientific research.

Inward Flow of Surface Materials at Back-Ends of Billets During Al-Extrusion, Part 1: A Finite Element Model

1999 ◽  
Vol 121 (3) ◽  
pp. 321-327 ◽  
Author(s):  
Jin Hou
Keyword(s):  
Finite Element ◽  
Surface Layer ◽  
Outer Surface ◽  
Metal Flow ◽  
Hot Extrusion ◽  
Element Model ◽  
Surface Material ◽  
Rigid Plastic ◽  
Simulation Results ◽  
Good Agreement

In hot extrusion of Al-profiles, the billet-container boundary is characterized by the sticking condition. The outer surface layer of the billet is stuck to the container wall. At the back-end of the billet, the metal flow is complicated. The surface material, which is initially stuck to the wall, will be scraped away by the pad and flow inward into the billet. This kind of inward flow of surface material is usually undesirable and it is important to control such flow so that no surface material should be found in extruded profiles. In order to study this phenomenon, a model is proposed for the metal flow at the back-end, in which the rigid-plastic FEM is used. A computer program FEMBA has been developed based on the model. The simulation results are in qualitatively good agreement with experiments.

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