Makine 2 Vize Konu Dağılımı ve Tarihleri

12 Aralık Pazartesi (Saat 10-12) - Malzeme 1 - Föy'de(Derslerde takip edilen Prof. Dr. Recep Kılık'ın hazırladığı Malzeme 1 notu) 106. sayfaya kadar.
13 Aralık Salı (Saat 10-12) - Diferansiyel Denk. - Ricatti ve Bernoulli dahil, işlenilen konular.
14 Aralık Çarşamba (Saat 1012) - Nümerik Analiz (Sayısal Yönt.) - İşlenilen Konular.*
15 Aralık Perşembe (Saat 15-17) - Str of Mtr. (Mukavemet) - Chapter 5 dahil işlenilen konular.Plastik Deformasyon'a kadar.*

16 Aralık Cuma (Saat 15-17)Müh. Matematiği - 3 Katlı İntegral konusuna kadar, 2 katlı integraller dahil.

18 Aralık Pazar (Saat 10-12) - Kinematik - Rijit Cisimler Kinematiği'ne kadar.




(* Kesinleşmemiş)
Erciyes Üniversitesi - Makine Mühendisliği 2. Sınıf Vize Konu Dağılımı ve Vize Tarihleri.

Malzeme 1

Malzeme 1 - 30.11.2011 tarihli derste işlenen "Yapı Kusurları" adlı powerpoint dosyası.

http://hotfile.com/dl/136391845/84e0c08/yapkusurlar.ppt.html

Mukavemet 1

Doç.Dr. Recep Güneş'hocamızın kişisel sitesinde(http://me.erciyes.edu.tr/recepgunes/) yayımladığı mukavemet 1 soru ve cevapları tek dosya halinde buradan indirebilirsiniz.


http://hotfile.com/dl/136031887/fe83baf/mukavemet.zip.html

Friction

 Whenever one surface moves over another, a force is set up which resist the movement.This force, which we call friction always opposes motion.It exists in every machine.It can be reduced by lubrication but never  completely removed.In general, the force opposing motion is slightly greater before one surface starts moving over another surface than after movement has started.This slightly greater force is called static friction.The force which must be overcome to keep one surface moving over another is known as sliding friction.Static friction is greater than sliding friction.
 The value of sliding friction depends on the nature of the two surfaces which touch each other.Thus friction between two rough planks can be lessened if they are made smooth.Sliding friction is independent of the area of surface in contact.In theory a small brake pad will exert as much braking force as a large one of greater surface area.In practice a small pad will wear down more quickly and therefore is not used.One other law of friction should be noted.We can make normal reaction between two surfaces in contact twice  as large by doubling the mass carried by one surface.If we do so we find that sliding friction between the surface is also doubled.If we halve the mass carried, sliding friction is also halved.This shows that sliding friction is proportional to the reaction between the surface in contact.

Vectors

There are many complex parts to vector analysis and we aren't going there. We are going to limit ourselves to the very basics. Vectors allow us to look at complex, multi-dimensional problems as a simpler group of one-dimensional problems. We will be concerned mostly with definitions The words are a bit strange, but the ideas are very powerful as you will see.

Math and science were invented by humans to describe and understand the world around us. We live in a (at least) four-dimensional world governed by the passing of time and three space dimensions; up and down, left and right, and back and forth. We observe that there are some quantities and processes in our world that depend on the direction in which they occur, and there are some quantities that do not depend on direction. For example, the volume of an object, the three-dimensional space that an object occupies, does not depend on direction. If we have a 5 cubic foot block of iron and we move it up and down and then left and right, we still have a 5 cubic foot block of iron. On the other hand, the location, of an object does depend on direction. If we move the 5 cubic foot block 5 miles to the north, the resulting location is very different than if we moved it 5 miles to the east. Mathematicians and scientists call a quantity which depends on direction avector quantity. A quantity which does not depend on direction is called a scalar quantity.

Vector quantities have two characteristics, a magnitude and a direction. Scalar quantities have only a magnitude. Whencomparing two vector quantities of the same type, you have to compare both the magnitude and the direction. For scalars, you only have to compare the magnitude. When doing any mathematical operation on a vector quantity (like adding, subtracting, multiplying ..) you have to consider both the magnitude and the direction. This makes dealing with vector quantities a little more complicated than scalars.

On the slide we list some of the physical quantities discussed in the Beginner's Guide to Aeronautics and group them into either vector or scalar quantities. Of particular interest, the forces which operate on a flying aircraft, the weight, thrust, andaerodynmaic forces, are all vector quantities. The resulting motion of the aircraft in terms of displacement, velocity, and acceleration are also vector quantities. These quantities can be determined by application of Newton's laws for vectors. The scalar quantities include most of the thermodynamic state variables involved with the propulsion system, such as thedensity, pressure, and temperature of the propellants. The energy, work, and entropy associated with the engines are also scalar quantities.

Vectors have magnitude and direction, scalars only have magnitude. The fact that magnitude occurs for both scalars and vectors can lead to some confusion. There are some quantities, like speed, which have very special definitions for scientists. By definition, speed is the scalar magnitude of a velocity vector. A car going down the road has a speed of 50 mph. Its velocity is 50 mph in the northeast direction. It can get very confusing when the terms are used interchangeably! Another example is mass and weight. Weight is a force which is a vector and has a magnitude and direction. Mass is a scalar. Weight and mass are related to one another, but they are not the same quantity.`

While Newton's laws describe the resulting motion of a solid, there are special equations which describe the motion of fluids, gases and liquids. For any physical system, the mass, momentum, and energy of the system must be conserved. Mass and energy are scalar quantities, while momentum is a vector quantity. This results in a coupled set of equations, called the Navier-Stokes equations, which describe how fluids behave when subjected to external forces. These equations are the fluid equivalent of Newton's laws of motion and are very difficult to solve and understand. A simplified version of the equations called the Euler equations can be solved for some fluids problems.

Corrosion

 Corrosion attacks all engineering materials, especially metals.Corrosion is any chemical action which harms the properties of a material.It reduces the life of a material and increases the cost of a structure.For example, a steel bridge must be repainted regularly to protect it from rust.Various metals have therefore been developed to resist corrosion.Among them are the stainless steels.These metals contain from 12 to 35% chromium which forms a very thin layer or film of chromium oxide on the surface of the metal.This film protects the metal from corrosion.Alloys made from copper and nickel are also corrosion-resistant.For example Monel metal, which contains roughly 60% nickel and 30% copper, is resistant to both fresh and salt water corrosion.It is therefore used for marine engine parts, and for surface like ship' propellers which are in contact with sea water.Cupronickels, which contain a smaller proportion of nickel, have a similar resistance to fresh  and sea water.They are mainly used to make tubes.

 When two different metals touch other in the presence of moisture, corrosion occurs.This type of corrosion is known as galvanic or electrolytic corrosion because it has an electrical cause.The metals and the moisture act like a weak battery and the chemical action which results corrodes one of the metals.If, for example, aluminium  sheets are riveted with copper rivets, the aluminium near the rivets will corrode in damp conditions.

 No material can be completely corrosion-resistant.Even stainless steels will corrode.Engineers can, however, fight corrosion.For example, they can use high-purity metals because these metals are more resistant than alloys.They can also make sure that two dissimilar metals are not allowed to touch each other.Finally engineers can protect the surfaces of metals in many different way.One of the most common methods is to paint them.

Şarkı söyleyen ağaç...

http://www.youtube.com/watch?v=4B0hGyKV9qs&feature=related

Çok ilginç.
Rüzgarın etkisini kıllanarak müzik oluşturuyor.Tabi şekil itibari ile ne kadar korkunç bir görüntü oluşturduğu düşünülsede aslında çok estetik...İzlemenizi tavsiye ederim.

Gerçekten mantıklı...

P. Deneyi

Bilindiği üzere philadelphia deneyi diye adlandırılan bir deney olduğunu bir kısım insanlar konu edinsede, bunlara karşılık deneyin bir "hikaye" den ibaret olduğunu söyleyen bir karşıt grup bulunmaktadır.
Detaylara fazla girmek istemiyorum, ki gerekli bilgileri tr.wikipedia.org sitesi üzerinden ayrıntılı bir şekilde inceleyebilirsiniz.
Mühendis gözüyle bakıldığında yapılan(yapıldığı resmi olarak kesinlik kazanmayan ve büyük ihtimalle gerçektende "hikaye" olarak görülen) deneyin gerçekten ilgi çekici yanları bulunuyor.Özellikle manyetik alan ile ilgili düşünülen veya kurgulanan deneyler her zaman büyük ilgi çekimlerine neden olmuştur.
Bahsedilen deneyde küçük bir cisim yerine devasa bir gemi kullanılmış ve üstelik mürettebatta gemiden çıkarımamış.Yani deneyin bir parçası.Ne kadar ilginç... Denek olmak ister miydiniz?
Ki deney sonucunda acı sonuçlara rastlandığını söylüyor sn.Allende;

" Bu olayın en korkunç bölümü ise beş denizcinin geminin eriyen ve sonra yine katılaşan metal levhalarının içinde kalmalarıydı. Bu çok feci bir durumdu. Denizcilerin birisi kurtuldu fakat bir daha eski haline dönemedi. Aklını tamamen yitirmişti ama yapacak hiçbir şey yoktu. Bazılarının psişik yetenekleri gelişmişti, sokakta yürürken kaybolan ve yine ortaya çıkan insanlar vardı. Manyetik alanın içinde kalan mürettebattan kaybolanlar ancak birisinin yüzüne ve eline dokunulmasıyla görünür hale geliyorlardı, yani dokunmanın giysinin olmadığı bir yere yapılması gerekiyordu."

Korkunç görünüyor...

Her ne kadar gerçekçilik payı bulunmasada, düşünülen fikirler gerçekten çok ilginç.Yani bir manyetik alanın gücünün ne kadar etkili olabiliceğini görebiliyoruz.Bir gemiyi yok etmede bile kullanılması söz konusu olmuş.Tabi bu ne kadar gerçekçi olmasa bu deneyi gerçekleştirilenler;

"Bu olaydan iki yıl kadar sonra, 20 Nisan 1959'da Morris Jessup, Miami'de Hammock Parkı'nda, kendi aracı içerisinde ölü bulundu. Polis raporlarına göre egzos gazıyla intihar etmişti. Carlos Allende ise bir daha ortaya çıkmadı ve olay bu şekilde kapandı."

şeklinde bir sonla karşı karşıya kalmışlar.

İlginç...

Thermal Hydraulic Analysis of Systems and Components

• 
• Thermal hydraulic analysis of nuclear reactor and process systems.  Fluid system thermal hydraulic analysis including steady state hydraulic modeling and transient analysis of single and two-phase systems.   Water hammer analysis, fluid induced pipe loads calculations, and root cause investigations.
• Nuclear reactor thermal hydraulic analyses associated with postulated accidents and transients including containment and sub-compartment pressure and temperature response, system's thermo-fluid response to pipe breaks or single failures.  Experience with codes such as GOTHIC, RELAP5, PIPE-FLO, and others.  Fluid-structure interaction calculations, such as jet impingement, related to pipe breaks.  Also, BWR hydrodynamic suppression pool loads analyses and evaluations.
• Thermal system and/or component analysis.   Multi-dimensional/combined mode steady-state and transient heat transfer analysis.   Equipment transient thermal lag analysis.  Post-incident room transient temperature calculations.  Heat exchanger performance calculations.  Cooling ponds, spray ponds, and cooling tower thermal design and analysis.  Refrigeration system's performance analysis.
• Thermo-fluid calculations for piping system erosion/corrosion programs including use of the commercial nuclear industry's CHECKMATE software code.
• http://www.applied-analysis.com/

Aerospace Engineering

Aerospace engineering is the branch of engineering behind the design, construction and science of aircraft and spacecraft^[1]. It is broken into two major and overlapping branches: aeronautical engineering and astronautical engineering. The former deals with craft that stay within Earth's atmosphere, and the latter deals with craft that operate outside of Earth's atmosphere.
While aeronautical engineering was the original term, the broader "aerospace" has superseded it in usage, as flight technology advanced to include craft operating in outer space.^[2] Aerospace engineering, particularly the astronautics branch, is often informally called rocket science.

more; http://www.wikipedia.com/