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Mechanical hysteresis

Mechanical hysteresis

Item no.: P2120300

Experiment Type: Teacher Experiment, Laboratory Experiment

Difficulty Expenditure of Time print
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Principle

The relationship between torque and angle of rotation is determined when metal bars are twisted. The hysteresis curve is recorded.

Benefits

  • Beyond Hooke's law
  • Hysteresis – mostly known from the field of magnetism – can be experienced in mechanics
  • Learn the meaning of the words stress, relaxation and equilibrium in a physics context
  • Various torsion rods out of different material and with several diameters included

Tasks

  1. Record the hysteresis curve of steel and copper rods.
  2. Record the stress-relaxation curve with various relaxation times of different materials.

What you can learn about

  • Mechanical hysteresis
  • Elasticity
  • Plasticity
  • Relaxation
  • Torsion modulus
  • Plastic flow
  • Torque
  • Hooke's law

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