When rigid materials are subject to particular stress or forces, deformation (compressed, twisted, stretched, etc) may occur. For many materials, when suffered from force or stress, the resisting or restoring force that tends to return the material to its original shape is proportional to the deformation. Young's Modulus, E, is a constant that describes the material's mechanical property of stiffness and is expressed as the ratio of stress to strain for a material experiencing tensile or compressive stress.
This apparatus is designed to study the deformation characteristics of thin metal sheet samples under load. Deformation is created by applying a small force F on the sheet. A micro-displacement sensor based on Hall effect is used to measure the deformation, where the output voltage is proportional to the amount of displacement.
Using this apparatus, the following experiments can be conducted:
1. Understand the principle, structure, properties and applications of a Hall displacement sensor
2. Measure the Young's modulus of a copper sample
3. Calibrate a Hall displacement sensor
4. Measure the Young's modulus of a malleable iron sample
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Hall micro-displacement sensing