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Ready-made research on resistance and materials laboratory in Word file format

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Download ready research about resistance and materials laboratory in Word file format with edit capability

Today, we, dear researchers, have prepared a ready-made article about the Laboratory of Resistance and Materials ready for download. You can submit it as a research. It is also editable in Word file format.

Details of the file you will download are as follows

Title: Laboratory of Resistance and Materials
File format: Word doc (word)
Ability to run with Office versions: 2013 to the latest version
Ability to edit after download: Yes
Possibility of printing: without any printing problems
Number of pages: 20

The selected text from the file is as follows

Strength of Materials Laboratory
Purpose of the material strength laboratory:
All parts that are used in machines and industrial devices have their own strengths and hardships that engineers after designing a machine or industrial device and all calculations related to the forces acting on each part of these devices must be the above parts. Are tested with a piece of the same material in terms of their hardness and strength to see if the piece can withstand the forces or stresses or not? These difficulties are done by different machines and devices.
What is the strength of materials?
When a body is affected by an external force, it shows different resistances depending on the amount and manner of the force. The science that studies the effect of force on objects and the reaction they exhibit is called material strength.
Material strength discusses the relationship between the external forces and the internal forces of objects (the forces of adhesion) of the particles of the body. These relationships depend on the sex of the body and the dimensions of the body and how the force is applied.
Common terms in material strength:
Strength:
Strength or resistance is the maximum resistance of the internal forces of the body against external forces.
Effort :
The resistance that the body's molecules show to external forces to prevent deformation is called effort.
Stress: To measure the strength of a body, the force acting on a flat unit is usually calculated and called tension.

Resistance and material tests
1: Tensile test
Objective: By testing the tensile strength of metals and plotting the stress and relative length change (ratio of length change to initial length), the necessary information can be obtained about how the force affects the body particles and the reaction that the body shows with increasing force. .


Building a tensile testing machine
Includes a cylinder pulley and hydraulic piston to apply force to the movable jaw. Movable piston - fixed jaw - regulator - regulator - force gauge (in Kn).
How to test:
It will be that a sample of an object with a certain length and cross-sectional area is prepared and it is closed between two clamps of the tensile testing device and first we subject the object to a small force and measure the increase in length due to the application of this force. We continue the above operation with more forces until it leads to the rupture of the test sample. Now if we transfer the obtained characteristics on the coordinate axis whose vertical axis shows the stress diagram and its horizontal axis shows the percentage increase of relative length and we connect them. The diagram is similar to the diagram below, in which the limits shown in the diagram are recognizable.
Description of experiment
First we apply a force of about 0.5 Kn to get the looseness and then we reset the measuring clock to zero and coordinate the hands of the force gauge. Then add 0.5 Kn, respectively. We continue to do this until the piece breaks.

Twist test

Title: Calculation of shear elasticity

The twisted members are often seen in engineering work. In this test, the twisted limb is discussed. This torsion is caused by the application of a torque or coupling to the member. Consider a circular shaft, one end of which is the fixed support of the product. If torque (T) is applied to the other end of this shaft or rod. The shaft is twisted and its free end rotates by (??). This angle is called the twist angle. Experiments and observations show that on a specific axis of the torque (T) the angle of torsion (??) is proportional to the torque. The angle (??) is also proportional to the length of the shaft. (Torsion angle) in the elastic region obtained from the relation: ?? = T.L / G.J.
The above equation equips us with a convenient way to determine the modulus of stiffness or shear elasticity of a given material. An example of this material is mounted in the form of a cylindrical wire with a known diameter and length in a torsion tester and torque is applied and torsion angle values ​​(??) are recorded.

Sub-test of a piece of copper with diameters of 10 mm and 5 mm

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