Laboratory Materials

 

 

  Destructive Testing (Mechanical Testing)  
Tensile test Experimentally determine the yield strength, tensile strength, and modules of elasticity and ductility of given materials.  
Compression test A compression test determines behavior of materials under a crushing load. The specimen is compressed and deformation at various loads is recorded. Compressive stress and strain are calculated.  The resulting stress-strain diagram provides information on elastic limit, proportional limit, yield point, yield strength and compressive strength.
Torsion test  This test is used to obtain twisting moment-twist relationship of a specimen and to determine shear modulus G, yield stress τy in pure shear, experimental ultimate torque.  
Hardness Test The hardness test is an indentation hardness test that can provide useful information about metallic materials. This information may correlate to tensile strength, wear resistance, ductility, or other physical characteristics of metallic materials, and may be useful in quality control and selection of materials.
Bending test Bend testing a material allows for the determination of that materials ductility, bend strength, fracture strength and resistance to fracture. These characteristics can be used to determine whether a material will fail under pressure and are especially important in any construction process involving ductile materials loaded with bending forces. If a material begins to fracture or completely fractures during a three or four point bend test it is valid to assume that the material will fail under a similar in any application, which may lead to catastrophic failure.
 No Image Impact Test  Impact Testing is a standardized high strain-rate test which determines the amount of energy absorbed by a material during fracture. This absorbed energy is a measure of a given material's notch toughness and acts as a tool to study temperature-dependent ductile-brittle transition.  
 No Image Creep Test A creep test involves a tensile specimen under a constant load maintained at a constant temperature. Measurements of strain are then recorded over a period of time.  Creep machines are important to see how much strain (load) an object can handle under pressure, so engineers and researchers are able to determine what materials to use. The device generates a creep time-dependent curve by calculating the steady rate of creep in reference to the time it takes for the material to change. Creep machines are primarily used by engineers to determine the stability of a material and its behaviour when it is put through ordinary stresses.  
No Image Fatigue Test To study the fatigue failure of materials. 
 Non - Destructive Testing  
No Image Liquid Penetrant Inspection Used to locate surface-breaking defects in all non -pronoun  materials .  
No Image Magnetic particle Inspection Magnetic particle Inspection (MPI) is a non-destructive testing  (NDT) process for detecting surface and slightly subsurface discontinuities in ferromagneti  materails such as iron ,nickel, cobalt and some of their alloys.  
No Image Ultrasonic Testing is a family of  non-destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested. It is used to detect internal flaws or to characterize materials.
No Image Eddy current testing  is one of many electromagnetic testing methods used in non-destructive testing (NDT) making use of electromagnetic-induction to detect and characterize surface and sub-surface flaws in conductive materials.  
Experiment for electrical engineering lab.
 1- DC Voltage Measurement. 2- Using An Ohmmeter.  3- Resistor Characteristics.  4- Resistor Color Code. 6- Ohm’s Law. 7- Power in DC Circuit. 8- Series - Parallel Network. 9- Kirchhoff’s Law. 10- Superpositon Theorem. 11- Thevenin’s Theorem.  12- Norton’s Theorem.  13- Maximum Power Transfer Theorem.  
Equipment and Devices Of electrical engineering lab.  
No Image  DC power supply  Fixed DC power supply : Voltage Range: -5V , +5V , -12V , +12V . Maximum Current Output: 0.3 A with output overload protection. Dual DC Power Supply : Voltage Range: ± 3V ∼  ±8V continuously adjustable Maximum Current Output:  1A with output overload protection. 
No Image Analog Meters   DC Current : 0 ∼ 100mA ∼ 1A   . DC Voltage : 0 ∼  20 V  .  
No Image     Variable Resistors  1- 1KW, 0.25W variable resistor with 3 terminals (A, B, C) . 2- 10KW, 0.25W variable resistor with 3 terminals (A, B, C) . 3- 100KW, 0.25W variable resistor with 3 terminals (A, B, C) . 4- 1MW, 0.25W variable resistor with 3 terminals (A, B, C) .  

 

 

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