Effect of Porosity on Residual Stress of 2024-Aluminum GTAW Specimen

2016 ◽  
Vol 872 ◽  
pp. 28-32 ◽  
Author(s):  
Pattarawadee Poolperm ◽  
Wasawat Nakkiew
Keyword(s):  
Residual Stress ◽  
Aluminum Alloys ◽  
Welding Speed ◽  
Fatigue Crack Initiation ◽  
Welding Process ◽  
The Body ◽  
Tensile Residual Stress ◽  
Welding Parameters ◽  
Relationship Of ◽  
The Relationship

Aluminum alloys are used widely in many applications due to its low in density which can lead to a lightweight product. A high percentage of Cu in the chemical composition of the 2024 aluminum alloys helps withstand the occurrence of corrosion as well. Thus, aluminum alloy grade 2024 is used as a material for several parts in aircraft and spacecraft components, (e.g. the body of commercial airplanes), as well as parts in many other applications. Gas Tungsten Arc Welding (GTAW) is used widely in joining material parts together. Inappropriate welding parameters usually cause problems such as porosity in the welding. The occurrence of porosity is undesirable in welding because it can affect the strength of the welding area as well as other properties. Tensile residual stress near the surface of the material expedites the fatigue crack initiation. The relationship of porosity and residual stress for GTAW parts was very limited in literatures. Therefore, the objective of this research was to investigate the relationship of porosity to the occurrence of residual stress after the welding process. Full factorial design of experimental technique was used for setting up welding conditions of the GTAW. The specimen with highest porosity was selected for further analysis of its effect on residual stress. Porosity was analyzed by the radiographic testing (RT) and the residual stress was measure by X-ray diffraction (XRD) using sin2 method. The results showed that the highest porosity in the welded bead was found at the current of 130 A, the welding speed of 210 mm./min., and the wire feed rate of 700 mm./min. The results also suggested that lower current and welding speed caused an increase in porosity. The residual stress results on both longitude and transverse directions showed tensile residual stress at locations around the welded bead area.

Numerical Simulation on Temperature and Stress Field of Multi-Pass Welding of Thin Stainless Steel Plate

2013 ◽  
Vol 302 ◽  
pp. 258-262 ◽  
Author(s):  
Yue Chen ◽  
Jian Min Han ◽  
Jun Tan ◽  
Heng Fang Du ◽  
Jun Qiang Wang
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Temperature Field ◽  
Stress Field ◽  
Welding Speed ◽  
Steel Plate ◽  
Welding Process ◽  
Cooling Time ◽  
Welding Parameters ◽  
Stainless Steel Plate

Welding parameters have important affect on welding quality. In this paper, temperature field and residual stress field simulation of thin 316L stainless steel plate are performed by finite element method. The welding process is multi-pass butt TIG(Tungsten Inert Gas) welding. Simulation model are established by SYSWELD code with multi-pass bead. A Gaussian heat source representing the arc energy is verified and the temperature distribution in multilayer welding process is simulated. Then the results are compared with test results measured by thermal-couples. Effects of welding speed and interpass cooling time during multi-pass on temperature field and stress field are studied. The results show that the faster the welding speed and the longer the cooling time, the higher the residual stress will be.

THE RELATIONSHIP OF MASS OF THE BODY, FISHERY LENGTH AND THE FISH – PRODUCTIVITY OF ONE-YEARS OF PIKEPERCH BY THE BREEDING THEM IN PONDS FOR CARPS

2017 ◽  
Vol 59 (2) ◽  
pp. 014-021
Author(s):  
Saya K. Koyshibaeva ◽  
◽  
Shokhan A. Alpeyisov ◽  
Evgeniy V. Fedorov ◽  
Nina S. Badryzlova ◽  
...  
Keyword(s):  
The Body ◽  
Relationship Of ◽  
The Relationship ◽  
Fish Productivity

Epilogue

2017 ◽  
Author(s):  
Joshua S. Walden
Keyword(s):  
The Body ◽  
The Self ◽  
The Individual ◽  
Relationship Of ◽  
The Relationship

The book’s epilogue explores the place of musical portraiture in the context of posthumous depictions of the deceased, and in relation to the so-called posthuman condition, which describes contemporary changes in the relationship of the individual with such aspects of life as technology and the body. It first examines Alfred Hitchcock’s Vertigo to view how Bernard Herrmann’s score relates to issues of portraiture and the depiction of the identity of the deceased. It then considers the work of cyborg composer-artist Neil Harbisson, who has aimed, through the use of new capabilities of hybridity between the body and technology, to convey something akin to visual likeness in his series of Sound Portraits. The epilogue shows how an examination of contemporary views of posthumous and posthuman identities helps to illuminate the ways music represents the self throughout the genre of musical portraiture.

scholarly journals Prediction of Bead Geometry with Changing Welding Speed Using Artificial Neural Network

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1494
Author(s):  
Ran Li ◽  
Manshu Dong ◽  
Hongming Gao
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Welding Speed ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Training Dataset ◽  
Welding Parameters ◽  
Bead Geometry ◽  
Bead Width ◽  
Artificial Neural

Bead size and shape are important considerations for industry design and quality detection. It is hard to deduce an appropriate mathematical model for predicting the bead geometry in a continually changing welding process due to the complex interrelationship between different welding parameters and the actual bead. In this paper, an artificial neural network model for predicting the bead geometry with changing welding speed was developed. The experiment was performed by a welding robot in gas metal arc welding process. The welding speed was stochastically changed during the welding process. By transient response tests, it was indicated that the changing welding speed had a spatial influence on bead geometry, which ranged from 10 mm backward to 22 mm forward with certain welding parameters. For this study, the input parameters of model were the spatial welding speed sequence, and the output parameters were bead width and reinforcement. The bead geometry was recognized by polynomial fitting of the profile coordinates, as measured by a structured laser light sensor. The results showed that the model with the structure of 33-6-2 had achieved high accuracy in both the training dataset and test dataset, which were 99% and 96%, respectively.

The Psychology of Memory in Spenser's Faerie Queene

PMLA ◽  
1932 ◽  
Vol 47 (1) ◽  
pp. 89-96
Author(s):  
Daniel C. Boughner
Keyword(s):  
The Body ◽  
World City ◽  
Faerie Queene ◽  
Extended Treatment ◽  
Relationship Of ◽  
The Relationship ◽  
The Faerie Queene

From Plato and Aristotle, Hippocrates and Galen, through the medieval commentators, the Elizabethans inherited a body of complex psychological principles. An examination of these principles and their bearing on The Faerie Queene has so far been only casual and incidental. Since in Book ii, Canto ix, the poet combines one of the most widely used of medieval motifs—the conception of the body as a world, city, or castle—with certain current doctrines of psychology, such an inquiry is especially apposite. Spenser's use of the abundant contemporaneous literature of psychology affords material for an extended treatment such as that which Miss Anderson has made of Shakespeare's plays. The present study purposes to set forth one aspect of his system of psychology—his psychology of memory in the allegory of the Castle of Alma, to make clear the relationship of his system to the current Elizabethan doctrines, and to establish the purpose of certain departures from those doctrines.

The Materiality of the Text and Manuscript Culture

2021 ◽  
pp. 48-62
Author(s):  
Martin Eisner
Keyword(s):  
Human Person ◽  
Essential Element ◽  
The Body ◽  
Manuscript Culture ◽  
Christian Anthropology ◽  
Body And Soul ◽  
Christian Thought ◽  
Relationship Of ◽  
Materiality Of The Text ◽  
The Relationship

This article investigates the significance of the manuscripts of Virgil and other classical poets that Dante might have read. Calling attention to the presence of musical notation (neumes) in copies that share the particular Virgilian readings Dante quotes, this essay explores the resonance of one of those passages (Aeneas’ dream of Hector) in Dante’s poem. It shows how Dante uses this Virgilian episode to craft his encounter with Manfred where he considers the relationship of body and soul that constitutes one of the major differences between classical and Christian thought, as Augustine frequently noted. Just as Christian anthropology maintains that the body constitutes an essential element of the human person, this essay argues that the materiality of the texts Dante read constitutes a crucial source for understanding how Dante interpreted these texts.

The development of the lamb with particular reference to the alimentary tract

1964 ◽  
Vol 6 (2) ◽  
pp. 169-178 ◽  
Author(s):  
R. V. Large
Keyword(s):  
Body Weight ◽  
Alimentary Tract ◽  
Live Weight ◽  
The Body ◽  
Root Transformation ◽  
Feeding Regimes ◽  
Gut Fill ◽  
Relationship Of ◽  
The Relationship

1. Thirty Suffolk × Half bred lambs were slaughtered at the following ages: two twin lambs at birth and two singles and two twins at 1, 2, 3, 4, 6, 8 and 16 weeks of age.2. The following weights were recorded: live-weight immediately before slaughter; and carcass, head, skin, feet, alimentary tract, heart, liver, kidneys, lungs and trachea, and blood immediately afterwards.3. The alimentary tract was emptied and weighed in four separate parts; reticulo-rumen, omasum-abomasum, small intestine, large intestine.4. The volumes of the reticulo-rumen and the omasum-abomasum were measured by immersing in water and filling the organs with water to 2 cm. pressure.5. The in vitro digestive efficiency of rumen liquor from lambs of 1, 2, 3 and 4 weeks of age was assessed.6. Empty body weight was considered to be valuable in comparing animals of different ages or from different feeding regimes or at different times of the year because variations in gut ‘fill’ were eliminated.7. There were no differences between singles and twins in the relationship of the fresh weights of the parts of the body to empty body weight, except that development of the liver and the blood was rather slower for singles.8. Little evidence was found of a difference in rate of development of the alimentary tract between singles an d twins, although the log an d square root transformation suggested a possible difference in reticulo-rumen size in favour of twins, significant at the 5% level.

scholarly journals The brain as a fundamental axis in learning process

2019 ◽  
Vol 5 (4) ◽  
pp. 38-45
Author(s):  
Luis Raul Meza Mendoza ◽  
María Elena Moya Martinez ◽  
Angelica Maria Sabando Suarez
Keyword(s):  
Learning Process ◽  
The Body ◽  
Traditional Scheme ◽  
Teaching Learning ◽  
Relationship Of ◽  
The Relationship ◽  
The Brain ◽  
Learning Schemes ◽  
New Strategies ◽  
The Way

Since the beginning of humanity, an attempt has been made to explain the way in which man acquires knowledge, the way in which he assimilates, processes and executes it in order to develop the teaching-learning process that people need throughout of his life, which forces to change the learning schemes using new study methodologies, such as neuroscience, which is a discipline that studies the functioning of the brain, the relationship of neurons to the formation of synapses creating immediate responses which transmits to the body voluntarily and involuntarily, in addition to controlling the central and peripheral nervous system with their respective functions. It is necessary to change the traditional scheme and implement new strategies that allow the teacher to venture into neuroscience, in order to individually understand the different learning processes that students do. As some authors of neuroscience say, the brain performs processes of acquisition, storage and evocation of information, which form new knowledge schemes that generate changes in the attitude of the human being, for this reason teachers are responsible for taking advantage of what It is known about the multiple functions of the brain and be clear about the various ways of acquiring knowledge.

scholarly journals Salvação do corpo. Sujeito e negatividade a partir da filosofia de Byung-Chul Han

2020 ◽  
Vol 80 (316) ◽  
pp. 441
Author(s):  
Welder Lancieri Marchini ◽  
Renan Silva Carletti
Keyword(s):  
Social Relations ◽  
The Body ◽  
Contemporary Philosopher ◽  
Relationship Of ◽  
The Relationship

O presente artigo discute a noçao de corpo a partir do filósofo contemporâneo Byung-Chul Han e como ela pode oferecer caminhos para pensar a constituição do sujeito na atualidade. Partiremos da exposição dos conceitos de positividade e negatividade descritos em A Sociedade do Cansaco e em outras obras do autor. Em seguida, abordaremos a relação do corpo com a liberdade e pornografia. Por último, mostraremos como a inserção e o reconhecimento do sujeito em suas relações sociais pode sugerir um caminho possível para ultrapassar o excesso de positividade característico de nossa época. Abstract: This article discusses the notion of body from the contemporary philosopher Byung-Chul Han and how it can offer ways to think about the subject’s constitution today. We will start from the exposition of the concepts of positivity and negativity described in The Burnout Socieity and other works by the author. Next, we will address the relationship of the body to freedom and pornography. Finally, we will show how the subject’s insertion and recognition in his social relations can suggest a possible way to overcome the excess of positivity characteristic of our time.Keywords: Freedom; Pornography; Subject; Transparency.

scholarly journals Pola Asuh Orang Tua Terhadap Anak Berdasarkan Golongan Darah

2019 ◽  
Vol 4 (2) ◽  
pp. 114-129
Author(s):  
Hamam Burhanuddin
Keyword(s):  
Social Interaction ◽  
The Body ◽  
Blood Type ◽  
Relationship With God ◽  
3 Dimensional ◽  
Islamic Studies ◽  
Stage Of Development ◽  
Relationship Of ◽  
The Relationship ◽  
The Brain

The study in this paper are explain about the studies of medical (medicine) blood type have the same relationship to human character because the blood producing antibodies and antigens. It could determine a person helpless hold strong or weak body, has an allergy to something or not, in the blood also contains various nutrients (like protein) and also the oxygen being supplied to the brain and nerves and body affect performance someone will then be emanated from the attitude of the person and social interaction. As has been explained, but keep in mind, there is blood in the genes, the nature of which is carried in the body/genotif rightly so it is, but we can not ignore the fenotif/nature arising or visible, this trait appear due to interaction between genes and the environment, so even if the person is smart in the intelligentsia and emotional, but grew up in a bad environment is going to be a bad trait. The theory of personality based on blood type can be used as a reference in parenting children through an understanding of the fundamental principles of the application of personality accompanied by parenting. Furthermore, the taking of steps in the care tailored to the stage of development of the child, in the Qur'an explicitly did not mentioned paragraph that discusses about blood type, but in the Qur'an there are blood (ad-Dam), Islamic studies in the study of Children is seen as a mandate from God, forming 3-dimensional relationships, with parents as the central figure. First, her parents relationship with God that is backed by the presence of children. Second, the relationship of the child (which still need a lot of guidance) with God through his parents. Third, the relationship of the child with both parents under the tutelage and guidance of God.

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