Smart Mechanicals

What is an I-beam? An I-beam, also known as H-beam, W-beam (for "wide flange"), Universal Beam (UB), Rolled Steel Joist (RSJ), or double-T (especially in Polish, Bulgarian, Spanish, Italian and German), is a beam with an I or H-shaped cross-section. The horizontal elements of the "I" are known as flanges, while the vertical element is termed the web. I-beams are usually made of structural steel and are used in construction and civil engineering. Why do we use I Beam, instead of rectangular beam? On the left side we have a simple rectangular beam, whereas on the left hand side on the above image, we have an I section beam. The question that is most commonly asked as to why do I section beam most frequently used in construction as compared to simple rectangular beam. And also why only I beam is used and not a beam of any other shape. When a beam is subjected to stresses, the outer layer is compressed, with the inner one undergo tension. The m...

Buffing : An Ideal Car Finishing Process Buffing is a polishing operation in which the work piece is brought in contact with a revolving cloth buffing wheel, which is charged with fine abrasive particles like aluminum oxide or silicon carbide. The cloth work as transporting medium for fine abrasive particle and the metal removed during rubbing action between work piece and buffing wheel. This metal removal process removes scratch or other suspended marks from the metal body and provides a mirror like surface finish. Buffing : An Ideal Process for Car Finishing Mostly buffing wheel is made by linen, cotton, broad cloth and canvass. This wheel made by multiple layers of these cloths overlapped on each other. The wheel rotates during buffing operation at a speed of 32.5 -40 m/s and a small pressure applied on the wheel which promote abrasive action and removes metal in form of microchips. Buffing is mostly used to remove only fine scratches or to remove oxide or similar...

Heat is transferred between a system and its environment when their temperature differs. Energy is transferred by thermal conduction. Metal is good conductor of heat. When you touch the metal ice tray, heat will transfer from your finger to the bit of ice and the ice melts results a thin film of water between the finger and the metal tray. Again the water film will freeze because the metal tray is so cold. Thus an icy bond will create in between the metal tray and your finger. That is why your finger sticks to a metal ice tray just taken from your refrigerator.

Basic Parts of a Car: [With Images] on  October 31, 2019 You should take your vehicle to a service center if something seems to be off, but it helps tremendously if you know something about car maintenance yourself. It helps if you look at a car parts diagram, so you know where the most important parts in your vehicle are located. Learn about car parts so you can have more in-depth discussions with your service technician about how to adequately maintain your vehicle. Battery The battery is a critical component. It allows your vehicle to turn on in the first place. In a majority of cars, it will be located under the hood, and you can identify it with the (-) and (+) symbols. In the event you need to jump-start your vehicle, you need to connect the red clamp of the jumper cable to the (+) symbol and the black clamp to the (-) symbol. Axle The axle is responsible for transferring power from the engine to the ...

The connecting rod connects the pistons to the crankshaft. It converts the linear motion of the pistons to the rotary motion of the crankshaft. On every stroke, the connecting rod is stretched and compressed. This pressure, plus other factors, can cause the connecting rod to bend. Some of the reasons for bending or bulking of connecting rod Hydrolock Hydrolock is a deformation of the connecting rod caused when water gets into the piston chamber. This usually happens after the car has been driven through deep water such as a flooded street.  Liquid will not compress like a fuel and air mixture so the only thing that can happen is the rod will bend as the piston is stopped prematurely at the top of the stroke.  If only a little water gets into the cylinder the car makes a knocking or tapping sound and it can be repaired (have the water taken out and the gaskets replaced), but if enough water gets in the cylinder that it takes up all the space available at spark...

Stress is defined as the resistance force acing per unit cross section area of the body. It is also defined as the ratio of applied load to the cross section area of the body.It is an internal property of the material.True stress and Engineering stresses are a bit different.  Let us take the example of tensile test.Before doing the tension test we have to determine the length and diameter of the specimen and we assume these parameters remain constant throughout the whole experiment. So when we calculate the stress by the formula-  Stress= Force/Area we actually calculate the stresses (corresponding to different strains) for the given value of diameter which we have calculated in the beginning of experiment. These stresses are called Engineering Stresses.but as we do the experiment we observe a phenomenon called necking and till now we have been neglecting any such necking which takes place. So let's see what happens when there is necking. So, As we...

Many kinds of liquids are transported by road and railway. The tanks carrying these liquids are made cylindrical in shape and not cubical. Why is this so?  If tanks are made in cube or cuboid, the capacity of the tanks will increase and they can hold more cargo. Even the large tanks used in refineries for holding the petroleum products are cylindrical in shape. Let's check out the answer: 1.)No stress concentration A cylindrical container doesn’t have ‘weak spots’ that need reinforcing, which would translate to using more material to build the tanker. In contrast, a rectangle/square has corners and flat sides, which create weak points for pressure. In other words, a rectangle-shaped container would fail faster than a cylindrical one upon experiencing a great deal of pressure. 2.)Stability The stability of the vehicle, especially one carrying liquids like oils and liquefied flammable gases, is of paramount importance. As such, you want to choose a shape whose cente...

HONDA COMBI BRAKE SYSTEM EXPLAINED !!! The Honda Combi Brake system was introduced in India with the Honda Activa in 2009. However, this system has been in use since more than 30 years internationally. The Honda Combi Brake system is a first-in-industry technology. What is the Honda Combi Brake System? The most efficient way of braking is to apply the front and rear brakes simultaneously. But it is a practice, most two-wheeler riders have not mastered.Combi brake means that the brake will act on front and rear wheel together every time you apply the brakes. This means a lot of improved safety. How does the Honda Combi Brake System Enhance Safety? In two wheelers (scooters and bikes), there are two separate brake controls for front and rear wheels.Most of two-wheeler riders apply only rear wheel brake, or use only rear brake in most of the cases. However for most effective braking and stopping in small distance safely without loosing control, both front...

 it makes us wonder what it is! Why do manufacturers want you to know that a it is drop forged? Striking a piece of hot metal with a hammer is forging, and blacksmiths have been doing this for centuries. As blacksmiths experimented with new techniques, they learned that complex shapes could be created by hammering metal into a die. The die contains the shape of the finished product. Modern manufacturers use either a falling hammer or a powered hammer to do the hammering (rather than doing it by hand), and usually use dies on both sides of the piece. This is drop forging. Drop forging is a metal shaping process, the metal to be formed is first heated then shaped by forcing it into the contours of a die, this force can be in excess of 2000 tons. The drop forging process can be performed with the material at various temperatures; >Hot Forging During hot forging the metals are heated to above their recrystallization temperature. The main benefit of ...

Differential gear , in automotive mechanics,  gear  arrangement that permits power from the engine to be transmitted to a pair of driving wheels, dividing the force equally between them but permitting them to follow paths of different lengths, as when turning a corner or  traversing  an uneven road. On a straight road the wheels rotate at the same speed; when turning a corner the outside  wheel  has farther to go and will turn faster than the inner wheel if unrestrained. Take a look at these wheels: ​ If you throw these two pictures at someone and ask them which part of the wheel keeps the train on the tracks, they would probably tell you that the flange is what keeps the wheels on tracks. That's only a half-told story at best.   Flanges are only a fail-safe mechanism. Main Mechanism Here is the main mechanism and it is brilliant. ​ Suppose the track turns left. The train’s right wheels now have to travel more tha...

IN BRIEF Lithium-ion batteries have made portable electronics ubiquitous , and they are about to do the same for electric vehicles. That success story is setting the world on track to generate a multimillion-metric-ton heap of used Li-ion batteries that could end up in the trash. The batteries are valuable and recyclable, but because of technical, economic, and other factors, less than 5% are recycled today. The enormousness of the impending spent-battery situation is driving researchers to search for cost-effective, environmentally sustainable strategies for dealing with the vast stockpile of Li-ion batteries looming on the horizon. As the popularity of electric vehicles starts to grow explosively, so does the pile of spent lithium-ion batteries that once powered those cars. Industry analysts predict that by 2020, China alone will generate some 500,000 metric tons of used Li-ion batteries and that by 2030, the worldwide number will hit 2 million metric tons per year. If ...