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  • MK-509 Young Modulus, Stress, Strain, Loadcell Experiments

    Possible Experiments :

    • The measurement of very small weights and compressions (min: 0.01N)
    • 0-20Newton strain force application
    • 0-20Newton compression force application
    • Stress-strain experiment on wires
    • Measurement of Young's Modulus
    • Connection to computer by RS232 connection and graphing stress-strain graph
    • The determination of breaking stress
    Microcontrolled Online Stress-Strain Graph on computer TECHNICAL INFORMATION

    Items                                 Specifications
    Power                            : AC 110-220V 50,60HZ
    Sensor                           : Loadcell
    Capacity                         : 2kg,50kg (Push-pull gauge optional)
    Unit switchover               : kg, N
    Display device                : LCD display
    Resolution & Accuracy    : 1/10,000 & ±1%
    Computer Connection      : RS232, USB
    Max. Displacement         : 400mm standards
    Test speed                     : 20-300mm/min (adjusted by the knob)
    Weight                           : Approx.15kg
    Accessories                   : One set tensile clamp, manual software
                                           operation video CD, user manual

    When a force is applied to both ends of a material the elongations are related to strains within elastic limits. If the force is linearly dependent on elongation (displacement) this is called as Hooke's law. Strain, σ is the force, F per surface area, A: σ=F/A. The modulus of elasticity, E is a characteristic property of the material. It is defined as the bond strength and it is a measure of resistance. The relationship between strain and elongation is: E=σ/ε. When the force is removed the length of the material is restored. This goes on until point P. The slope of this curve gets smaller until point E: elastic limit. After point E, the permanent plastic deformations starts. When force is reduced the curve goes back on the same curve but the elongation is no more zero when force is removed. When force is increased further, the material starts to flow at point Y and a big amount of plastic deformation starts to take place. At this stage the material gets harder and allows more force. The material elongates further near point U if force is increased. Finally it breakes at point K..This is the point the device presented here measures.

    COMPUTER CONNECTION: This device can be connected to computer using RS232 or USB connections. The stress-elongation graph can be directly observed online from the computer screen. The graphing can be started and stopped by the user and the user can start data write on a file for later examination.