Wednesday, January 29, 2020

Failure Of Materials Essay Example for Free

Failure Of Materials Essay Failure of materials is an analysis in engineering world, to approach and determining about how and why a materials has failed, like iron bar, why it can crocked or porous. Some general causes of failure are structural leading, wear corrosion and latent defects. Failure of materials must be known by an engineer, safety is the first word when engineer working building structure. They can not take random about materials that is used. They must know strength, flexibility, and endure of materials. For adding, with developing and updating software or research that had be done by company, we’ll more easy to know the characteristic of materials that we use. TYPICAL OF FAILURE OF MATERIALS Fatigue Failures Metal fatigue is caused by repeated cycling of the load below its static yield strength. It is a progressive localized damage due to fluctuating stresses and strains on the material. Metal fatigue cracks initiate and propagate in regions where the strain is most severe. The process of fatigue consists of three stages Initial crack initiation, Progressive crack growth across the part, and Final sudden fracture of the remaining cross section. Corrosion Failures Corrosion is chemically induced damage to a material that results in deterioration of the material and its properties. It is most coming from environment. Corrosion is normal, it is can not be removed, but can be minimized with several strategy like proper choice of material, design, coatings, and occasionally by changing the environment. Various types of metallic and nonmetallic coatings are regularly used to protect metal parts from corrosion. If corrosion can be minimized, materials be able to use and more advantage. Ductile and Brittle Metal Failures Ductile metals experience observable plastic deformation prior to fracture. Brittle metals experience little or no plastic deformation prior to fracture. At times metals behave in a transitional manner partially ductile/brittle. Ductile fracture is characterized by tearing of metal and significant plastic deformation. The ductile fracture may have a gray, fibrous appearance. Ductile fractures are associated with overload of the structure or large discontinuities. High Temperature Failures In physics theory, when a materials is being warm, they will expand than original size. We know about boilers, gas turbine engines, and ovens are some of the systems that have components that experience creep.   An understanding of high temperature materials behavior is beneficial Failures involving creep are usually easy to identify due to the deformation that occurs. Failures may appear ductile or brittle. While creep testing is done at constant temperature and constant load actual components may experience damage at various temperatures and loading conditions. in evaluating failures in these types of systems. High temperature progressive deformation of a material at constant stress is called creep. High temperature is a relative term that is dependent on the materials being evaluated. Liquid Metal   and Hydrogen embitterment Failures   Liquid metal embitterment is the decrease in ductility of a metal caused by contact with liquid metal. The decrease in ductility can result in catastrophic brittle failure of a normally ductile material. Very small amounts of liquid metal are sufficient to result in embitterment. The liquid metal can not only reduce the ductility but significantly reduce tensile strength. Liquid metal embitterment is an insidious type of failure as it can occur at loads below yield stress. Thus, catastrophic failure can occur without significant deformation or obvious deterioration of the component. Hydrogen embitterment failures are frequently unexpected and sometimes catastrophic. An externally applied load is not required as the tensile stresses may be due to residual stresses in the material. The threshold stresses to cause cracking are commonly below the yield stress of the material. Very small amounts of hydrogen can cause hydrogen embitterment in high strength steels. Common causes of hydrogen embitterment are pickling, electroplating and welding, however hydrogen embitterment is not limited to these processes. There are causes of materials failure, but not disease that not have medicine. Every materials that we use have a protection, protection come from our knowledge about characteristic of materials as chemical composition, using guide or calculation and appointment the materials for our structure. Addition, many factory,   metal – producing majority, also publish list of their product that have content about characteristic ( strength, elasticity, endure and treatment). Bibliography Omens, J. H., MacKenna, D. A., and McCulloch, A. D. Measurement of Strain and Analysis of Stress in Resting Rat Left Ventricular Myocardium.   J. Biomech Press,1993. TCR Engineering Services Technical Team. White Paper: Investigating Material and Component Failure.   TCR Engineering Services Pvt. Ltd. India, 2004. Haut Donahue, T. L., Gregersen, C., Hull, M. L., and Howell, S. M. Comparison of Viscoelastic, Structural, and Material Properties. ASME, 1994.

Tuesday, January 21, 2020

Event and Milieu :: Language Sociology Essays

Event and Milieu ABSTRACT: I consider how the notion of event is used in such important branches of twentieth-century thought as relativity, quantum mechanics, Marxist sociology and psychoanalysis. I show that in each case there is the same concept of event as of a series of communications. It is also shown that this new concept of event corresponds to traditional concepts of historical events. I analyze the difference between the concept of event and that of fact. Since a fact presupposes "an external observer" it is impossible to deal with an event without being involved in it. Since a fact presupposes its permanent logical form as a necessary condition of knowledge about it, any condition of knowledge about an event appears to be empirical itself. I show that the division between history and prehistory has the same basis as that between event and fact. The crucial question is how knowledge about an event is possible. The problem is that the concept of identity applicable to fact appears to be inap plicable to event. However, it appears possible to define an identity of event with an identity of media or "places" of communication. An open system of such "places" we call "milieu." A language is a paradigm for it. However, I suppose that unlike "the linguistic paradigm," the "paradigm of milieu" should refute the idea of the exceptional status of human language. The notion of event became to play a basic role in science with such revolutionary physical theories as relativity and quantum mechanics. Today the notion of event is widely applied also in synergetic. To make clear the importance of the notion of event for sociology and psychology of 20-th century it is enough to name such a key figures of the century as Marx and Freud. The notion of social even (revolution) is essential for Marxism as well as the notion of psychological event (child’s trauma) for Freud’s psychoanalysis. We cannot say that the notion of event was neglected by philosophers of our century: Heidegger and Deleuze among others presented elaborated concepts of event. These concepts (which can not be analyzed here) however do not relate directly to science nor to knowledge in general. What is an event as a matter of knowledge remains beyond considerations of these authors. To answer to the question is the first purpose of this paper. The second purpose of the paper is to elaborate a notion of environment or milieu that as it is shown below appears to be correlative to that of event.

Monday, January 13, 2020

Best Buy Case Study Write Up Essay

1. How does Best Buy define customer centricity? The idea behind customer centricity was to be the customer’s smart friend and give a full solution. The sales people stand by the customers and try to find what they really need and what they want. The opposite of this would be product centricity. At this time the electronics were getting easier to use, their interaction required specific knowledge that only a fraction of the client base possessed. In this situation, the used to be advantage of best buy disappeared, and the company tested the first version of customer-centricity by setting up 12 laboratory stores and then rolling out tested concepts in 32 pilot stores. The test were successful very successful. Best buy changed its segments from products such as MP3, TV, or PC to customers like Barry. All these make customers more convenient to shop in the store. Compared to the other stores, Best Buy did not focus on brands but usage. The sales person never asked what do you want to buy, but rather ask what you want to do. In launching customer centricity, Anderson used an autocratic set of power tools and expected swift support from his top team to execute his vision. 2. Is Customer-Centricity the same as customer services? No, the customer-Centricity is not the same as customer service. The difference is that they can contour their sales and service pitch to each individual after they know which category that they fall into. They know from past company stastistics and knowledge about the different types and what their shopping style is like. Customer service is about trying to sell your existing products. The case states also that customer service may be in response to its competitors, and not its customers. Customer centricity mainly focuses on research of customers buying power, purchase preference and customer behavior. It is based on the research that Best Buy has gathered over time. From here, the company can redesign its products, and develop a new marketing strategy and give more suitable service. 3. How does it relate to Consumer behavior? Chapter 10 touches upon things that could be related to consumer behavior. In store decision making talks about spontaneous shopping which is unplanned buying and impulse buying. Point of purchase stimuli is product display or demonstration that draws attention. The salesperson also can create exchange process. This involves commercial friendships. This is basically what customer centricity is about, forming commercial friendships. Chapter 10 also talks post purchase satisfaction which is the overall feeling about a product after someone has purchased it. Chapter 13 discusses income and social class and this is directly correlated to the customer centricity model. The model puts people in different classes. They were Jill, Barry, angles and devils. Chapter 13 goes into detail and talks about how people can be put in classes based on income, education, age, religion, gender, just like Best Buy put these four people into classes to segment them. Best Buy, in essence, used consumer behavior to classify these people. 4. Finally, do you agree with this new strategy for Best Buy? What is its impact on the financial performance? We think that it was a good idea for Best Buy to implement this. It has worked financially and it seemed to have made the company more profitable. From looking at the financials from 2002 to 2004, it appears as though the strategy seems to be working. Best Buy remains at the top of the list for Consumer electronics companies in the United States. Its revenue was 49.7 billion dollars in 2010, which is 18% of North American market share. In the last 5 years, it keeps 25% of gross profit growth. It seemed like it was known that Wal Mart would catch Best Buy as the number one store at that time, but I think this was because of different reasons, like its building of so many new stores and supply chain capability.

Sunday, January 5, 2020

Living A Just Life Is More Worthwhile Than Living An...

Aya Abunada September 22, 2015 POT3003 University of South Florida Essay #1 In this paper, I am going to argue that living a just life is more worthwhile than living an unjust life. I will do this with evidence provided from the text. The argument in question is why (given the advantages of living an unjust life) would anyone want to live a just life. This very question was a major debate that carried on during most of the text of The Republic of Plato. Throughout the text we see Socrates, Thrasymachus, Adeimantus and Glaucon take on this challenge. They thoroughly go through what they feel is just, and unjust. They also outline the benefits of living both types of ways. They take the various ideals discussed and pick them apart in every which way possible. There is no point of view that is brushed under the rug. After seeing the stance of several of the characters in this book, I see myself siding with Socrates on many levels. This challenge is taken on heavily and incorporated in many of the other concepts discussed within Socrates’ circle. When the argument is first discussed, Thrasymachus states that he feels as though living an unjust life is better because it â€Å"pays more† and that â€Å"a just man has the worst of it.† (25) He compares it to a business partnership. He says that the more honest of the two business partners never has the greater share, and always ends up paying more taxes (even if he has the same amount of property as the dishonest man.) I found this to be anShow MoreRelatedSufficiency Is A Controversial Topic Among Philosophy1451 Words   |  6 Pagesopinion on this topic in How Adam Smith Can Change Your Life written by Russ Roberts. From Smith’s point of view, justice, prudence, and beneficence are sufficient for a good life. His outlook is questionable because it is self-limiting and the details of a good life varies from person to person. 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