Mechanical Engineering

may i know the other term of propeller blade particular in ship propeller

There is no alternative term for "propeller blade", but the entire prop is sometimes called a screw.

the fine boring spindle using CBN tools creates chatter . is it because less damping ratio of spindle? the bore is 100 mmdia . L/D ratio is 5

Graphite bcoz it exapands on cooling

in general:

and also negative allowance is generally provided for the internal cavities in the casting so that upon cooling they contract to near the original dimension

Venturi Meter is a device used for measuring the flow of the fluid.

transmission and distribution of electricity are the way of regulate voltage to the minimum rate in which can be benefit to the consumers. From generating station , voltage generated is up 16/25kv which step up upto 330kv this generating voltage now step down in the transmission station through the step down transformer which is 132kv this voltage now transmitting to distribution station where voltage now step down to 33kv, this 33kv now stepdown to 415v for three line and 240/220v for a line for the uses of consumers.

The hoop stress is the force exerted circumferentially in both directions on every particle in the cylinder wall.

ANY MACHINED BAR CAN BE CALLED AS ROD, IT TRANSFERRS MOTION FROM ONE LINK TO ANOTHER..................IF THE SUPPLIED MOTION IS OF TORSIONAL TYPE(WHICH TENDS TO ROTATE THE LINK ON ITS OWN AXIS) THE SAME ROD IS CALLED A SHAFT...

RANA PRAKASH

ranaprakash2873@gmail.com

Kryptonite

Kevlar

Yes.

Wear! As the working surfaces wear out, they don't mesh as well.

Elastic deformation returns to it's original shape after a strain is applied.

Plastic deformation returns to a deformed shape after a strain is applied. The material's molecular bonds are strained to the point of fracture, making it not possible to return to the same state.

Elastic deformation will return to its original shape. Plastic deformation is when you alter the original form. To understand more on this subject you might investigate failure analysis literature. Lots of good stuff there ratchet marks, beach marks, reverse bending etc...

I believe the U.S. metallurgical society has the best reference material on this subject.

A temporary shape change that is self-reversing after the force is removed, so that the object returns to its original shape, is called elastic deformation. In other words, elastic deformation is a change in shape of a material at low stress that is recoverable after the stress is removed.

Examples would be the loading of a bridge or building support beam where the loads remain within the original design parameters, or the use of a safety pin where when it is opened it returns to it's unloaded shape.

When the stress is sufficient to permanently deform the metal, it is called plastic deformation.

Examples would be the building support beams for the twin towers, where the heat generated by the fires decreased the strength of the steel and allowed it to deform plastically, or the loads that are applied to a section of electrical conduit or mechanical piping in order to bend them into a specific shape.

in elastic def. , the material returns to its original shape once force is removed. in plastic, the deformation is permanent and the material doesn't return to its original shape

and elastic deformation back to original size but plastic deformation will not back tto original size.

Bennox is a high carbon steel suitable for hard wearing applications. The steel has a hardness of 200BHN however is difficult to weld due to the high carbon equivalent. The material is used for liner plates and scrapper blades etc. Bennox is considered a substitute for Quenched and Tempered steels due to the price equivalent.

Nominal Analysis

0, 4%-0, 55% C, 0, 7%-1, 0% Mn, 0, 15%- 0, 35% Si

It's expensive because it is quite scarce, it tarnishes, and it melts earlier and is less strong than some other metals.

There is very little metal to metal contact as the metal parts are separated by a film of oil. Newer EFI equipped engines last longer due to better control of fuel, as they completely shut off the fuel when decelerating, which prevents fuel from washing the cylinder walls .

Contact block 1N.O. + 1N.C. + 1N.O. scaled

Wbc means ''Welcome Back''

1) The nonequilibrium martensite does not appear on the diagram; and

2) The diagram provides no indication as to the time-temperature relationships for the formation of pearlite, bainite, and spheroidite, all of which are composed of the equilibrium ferrite and cementite phases.

Plunger is used in diesel engine fuel injection system which meters the fuel into combustion chamber. Higher the plunger diameter, higher the fuel injected into the cylinder. The plunger diameter of a typical diesel engine could be 9-10mm. Cam disk is connected to the plunger and each revolution, plunger will diesel 4 times into the combustion chamber.

Screw output in hertz how do you do

Harmonic structure, also known as timbre.

Yes, sheet metal can definitely be bent by hand, but it depends on a few factors:

Thickness: Thinner gauges of sheet metal (like aluminum flashing or very thin steel) are relatively easy to bend with just your hands or simple tools like pliers.

Type of Metal: Softer metals like aluminum and copper are much easier to bend than harder metals like steel.

Size of the Sheet: A small piece of sheet metal is much easier to manipulate than a large sheet.

Desired Bend Radius: Sharp bends are harder to achieve by hand than gentle curves.

For simple bends in thin, soft metals, you can often get away with using just your hands, a sturdy edge (like a table), or basic hand tools. However, for thicker metals, larger sheets, or more precise bends, you'll likely need specialized tools like a sheet metal brake.

ADH MACHINE TOOL might have some content relevant to your specific needs.

Pitch

how to calculate different stresss on the involute internal spline

The system is simpler with less parts, therefore less costly. Engine in front, front drive adds the complication of having to steer the driven wheels. Engine in front, rear drive adds the requirement for a driveshaft, and the second gearbox for the differential.