A Note on Repeated Loading Tests on Components and Complete Structures

1950 ◽  
Vol 54 (469) ◽  
pp. 1-10 ◽  
Author(s):  
H. L. Cox ◽  
E. P. Coleman
Keyword(s):  
Fatigue Testing ◽  
New Method ◽  
Repeated Loading ◽  
Large Strains ◽  
Advantages And Disadvantages ◽  
Resonance Principle ◽  
Load Tests ◽  
Loading Tests ◽  
Repeated Load

SummaryThe purpose of this paper is to describe a method for making repeated load tests and to illustrate several applications of the method.The general characteristics of fatigue testing machines operating on the resonance principle are described, with particular reference to the mode of excitation. A method of excitation different from that in common use is described, and its advantages and disadvantages are explored. Four applications of the new method are instanced.The new method proves particularly applicable to the repeated loading of complete structures and components, because it is readily adaptable to parts of awkward shapes loaded in special ways. Moreover, application of the method is not seriously restricted by large strains of the component under test, nor by moderately heavy absorption of energy by the component.Several further applications of the method to the testing of complete structures are under consideration, and the development of types of fatigue testing machines based on the same method is being explored.

A new method for ultrasonic fatigue testing of equibiaxial and pure shear cruciform specimens

2021 ◽  
pp. 106423
Author(s):  
Pedro R. da Costa ◽  
Luís Reis ◽  
Diogo Montalvão ◽  
Manuel Freitas
Keyword(s):  
Fatigue Testing ◽  
Pure Shear ◽  
New Method ◽  
Ultrasonic Fatigue

scholarly journals Establishing a Comprehensive English Teaching Pattern Combining the Communicative Teaching Method and the Grammar-Translation Method

2011 ◽  
Vol 4 (1) ◽  
pp. 76 ◽  
Author(s):  
Na Kong
Keyword(s):  
Teaching Methods ◽  
Teaching Method ◽  
New Method ◽  
Translation Method ◽  
English Teaching ◽  
Advantages And Disadvantages ◽  
Grammar Translation Method ◽  
Teaching Pattern ◽  
Definition Of ◽  
Communicative Teaching

Based on the current contradiction between the grammar-translation method and the communicative teaching method in English teaching, this paper, starting with clarifying the task of comprehensive English as well as the definition of the two teaching methods, objectively analyzes their advantages and disadvantages and proposes establishing a new method by fusing them with an elaboration on the reasonability of combining them in the practical teaching of comprehensive English with their complementary advantages.

Efficient Fatigue Testing of Tubular Joints

2015 ◽  
Author(s):  
P. Thibaux ◽  
J. Van Wittenberghe ◽  
E. Van Pottelberg ◽  
M. Van Poucke ◽  
P. De Baets ◽  
...  
Keyword(s):  
Finite Element ◽  
Fatigue Testing ◽  
Fatigue Loading ◽  
Tubular Joints ◽  
Testing Method ◽  
Out Of Plane ◽  
Resonance Principle ◽  
Tubular Joint ◽  
The Cost ◽  
Good Agreement

Tubular joints are intensively used in off-shore structures for shallow waters. Depending on the sea conditions and the type of structure, the design can be fatigue driven. This is particularly the case for off-shore wind turbines, where turbulences are generating a fatigue loading. Any improvement of the fatigue performance of the tubular joint would be beneficial to reduce the weight and the cost of the structure. To assess efficiently the fatigue resistance of the tubular joint, a testing method has been developed based on the resonance principle. The complete circumference of the welded joint can be loaded, successively in the in-plane and out-of-plane modes at a frequency close to 20Hz. Finite element computations were used to investigate the feasibility of the concept. Then, an X-node was made and successfully tested to investigate the stress distribution along the weld. The experimental results were compared with finite element computations, giving a good agreement.

Comparison of New Telescopic Video Microlaryngoscopic and Standard Microlaryngoscopic Techniques

1992 ◽  
Vol 101 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Eiji Yanagisawa ◽  
Ken Yanagisawa ◽  
Jay B. Horowitz ◽  
Lawrence J. Mambrino
Keyword(s):  
Video Camera ◽  
New Method ◽  
Depth Of Field ◽  
Microscopic Technique ◽  
New Approach ◽  
Advantages And Disadvantages ◽  
Laryngeal Surgery ◽  
Valuable Method ◽  
Microlaryngeal Surgery ◽  
Television Image

A new approach to microlaryngeal surgery using a specially designed video microlaryngoscope with a rigid endoscopic telescope and an attached video camera was introduced by Kantor et al in 1990. The ability to video document and perform surgery of the larynx by viewing a high-resolution television image was demonstrated. This method was recommended over the standard microscopic technique for increased visibility with greater depth of field, unimpeded instrument access, instant documentation, and superior teaching value. The authors tried this new method and the standard microscopic technique at the same sitting on a series of patients. This paper will compare these two different techniques and discuss their advantages and disadvantages. Although the new method has many advantages, the standard microscopic technique remains as a valuable method in laryngeal surgery.

scholarly journals A new method of spectrophotometry in the visible and ultra­violet and the absorption of light by silver bromide

1920 ◽  
Vol 97 (683) ◽  
pp. 181-190 ◽  
Keyword(s):  
Light Intensity ◽  
Photographic Plate ◽  
Wave Length ◽  
New Method ◽  
Silver Bromide ◽  
Selective Absorption ◽  
Quantitative Investigation ◽  
Advantages And Disadvantages ◽  
Absorption Of Light

A quantitative investigation of the absorption of light by silver bromide has been undertaken as a preliminary to a photochemical investigation of the action of silver bromide in the photographic dry plate. A good summary of the advantages and disadvantages of the various methods which have been devised by different experimenters for the quantitative investigation of the absorption of light by substances is given by Ewest in a thesis entitled, “Beiträge zur quantitativen Spectralphotographie,” of which an abstract is given by F. F. Renwick. All the methods which have been used previously either depend upon Schwarzschild’s law of the relation between time of exposure and the photographic effect, or a so-called neutral wedge is used which is supposed to absorb equally in all wave-lengths or is calibrated for selective absorption. The method which we have used is in some ways similar to that used by Ewest, but the apparatus required is very much simpler and a wedge of the material under examination is used instead of the neutral wedge of Ewest. In our method all that is required of the photographic plate is that the exposure of two adjacent portions of the same plate to the same light intensity of the same wave-length or the same time gives the same density under identical conditions of development. This condition is easily satisfied. As will be seen in the sequel, errors are reduced to errors in measurements of length.

Lattice-constant and stress measurement in single crystals: a new method

2005 ◽  
Vol 38 (4) ◽  
pp. 678-684 ◽  
Author(s):  
Balder Ortner
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Lattice Constant ◽  
Stress Measurement ◽  
New Method ◽  
Lattice Plane ◽  
X Ray ◽  
Advantages And Disadvantages

A method for the X-ray determination of lattice-plane distances is given. Similar to Bond's method, it is based on the measurement of rocking curves, with some advantages and disadvantages compared with the former method. The new method is especially designed for single-crystal stress measurement. Its usefulness is demonstrated in two examples of lattice-constant and stress measurement.

scholarly journals STRUCTURAL DEVELOPMENT AND RESEARCH OF TECHNOLOGICAL PARAMETERS OF MACHINES FOR CENTRIFUGAL -PLANETARY VIBRATION TREATMENT

2020 ◽  
pp. 41-50
Author(s):  
Leonid Yaroshenko ◽  
Igor Kupchuk ◽  
Mykhailo Zamrii
Keyword(s):  
High Efficiency ◽  
Metal Removal ◽  
Three Dimensional ◽  
High Hardness ◽  
Working Environment ◽  
Repeated Loading ◽  
Structural Development ◽  
Technological Parameters ◽  
Advantages And Disadvantages ◽  
Wide Range

The paper analyzes current state and prospects of further development of technology and equipment for mechanization and automation of finishing and cleaning of details. It is stated that the most effective for this purpose are the methods of abrasive machining, which include bulk galvanizing, vibration, centrifugal-rotary and centrifugal-planetary processing. These methods reduce the complexity and cost of processing, which in some cases reaches 20% of the total cost of manufacturing parts. Each of these methods has a different level of efficiency, certain advantages and disadvantages, the level of versatility and scope of effective application. The processes of vibration processing are quite deeply studied, for its industrial mass-produced technological equipment, but they have certain shortcomings that limit their use for further widespread implementation. Centrifugal-rotary processing is a more productive process of three-dimensional finishing and cleaning treatment, but its scope is limited by the possibility of processing parts that are not complex, usually flat. The most productive methods of finishing and cleaning of details include centrifugal-planetary volume processing which high efficiency is caused by repeated loading of particles of working load by inertial forces that creates preconditions for the solutions of a wide range of technological problems, for example, processing of details of difficult form, small weight and the sizes from materials of high hardness or viscosity that represents a serious problem for other methods of volume processing. The constructive scheme is offered in the work and the influence of the composition of the abrasive free-granular working environment on the productivity of the machine for centrifugal-planetary processing of details is investigated. The kinetics of metal removal from the surface of machined parts using different types of abrasive working environment is analyzed. The results of comparative machining of parts in a torus vibrating machine and a machine for centrifugal-planetary machining are given. It is shown that the simultaneous use of centrifugal-planetary and vibration processing methods allows to increase the intensity of the process while ensuring high quality machining of parts of relatively complex shape. The constructive scheme of the machine which allows to implement the specified combined method of processing is offered and described.

What is the Sense of Life, and How Can We Study It? Review of the monograph: Sources of the sense of life. A new method of personality psychodiagnostics, by K.V Karpinskij

2021 ◽  
pp. 228-234
Author(s):  
V.A. Mazilov ◽  
Keyword(s):  
Meaning Of Life ◽  
Psychological Research ◽  
Diagnostic Techniques ◽  
New Method ◽  
Methodological Issues ◽  
New Techniques ◽  
Advantages And Disadvantages ◽  
The Subject ◽  
Diagnostic Research ◽  
Diagnostic Complex

The article is a review of the book "Sources of the meaning of life: a new method of personality psychodiagnostics" by the Belarusian psychologist K.V. Karpinskij. It is argued that the meaning of life became the subject of special psychological research only in the 20th century. In recent years, there have been many breakthroughs in this area, and undoubted progress is visible. There was a transition to the interpretation of the meaning of life as a systemic, that means, in other words, multicomponent and multilevel mental education. In his previous works K.V. Karpinskij subjected the problem of the psychology of the meaning of life to a comprehensive analysis. This book has no analogues among the observable thematic literature and contains new theoretical ideas, original methodological solutions and rich factual material, which together form a new look at the key methodological issues of the psychology of the meaning of life. First of all, this is a question about the subject and method of research. Despite the fact that the study of the psychology of the meaning of life is largely represented in foreign psychology, the author of the monograph consistently adheres to the methodology of Russian psychology. The book offers the author's methodology "Sources of the meaning of life", which was created with a full understanding of the advantages and disadvantages, opportunities and limitations of existing foreign analogues. Being a diagnostic complex in its composition, this technique has incorporated proven diagnostic techniques, as well as completely new techniques for studying the meaning of life. The methodology clearly surpasses the existing tools in its diagnostic (research) capabilities.

scholarly journals Ontology as mapping of material world

2018 ◽  
Vol 44 ◽  
pp. 00055
Author(s):  
Irina Leshcheva ◽  
Dmitry Leshchev
Keyword(s):  
Conflict Resolution ◽  
Knowledge Bases ◽  
Structured Data ◽  
Suggested Method ◽  
New Method ◽  
Network Resources ◽  
Material World ◽  
Advantages And Disadvantages ◽  
Different Types

This paper reviews currently available approaches and methods of automated population and enrichment of ontologies or ontology-based knowledge bases by structured data stored in various heterogeneous sources. Advantages and disadvantages of each approach are pointed out. The results of the analysis allow concluding that the existing methods are not effective enough to solve practical problems. A new method suggested does not have any of the specified disadvantages. The suggested method allows integrating data from different types of sources and considering the distributed nature of data and the necessity of authentication during accessing network resources. The method also suggests a solution to the problem of integrated data conflict resolution so that it will reduce the complexity of populating and enriching ontologies using the collected data arrays, irrespective of the format in which data are stored or represented.

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