Precision Strain Methodology for Material Characterization
Keywords:
Material Rigidity, Strain Gauges, Data Acquisition Device, Deformation BehaviourAbstract
This project details the development of an instrument for evaluating material rigidity and flexibility through precision strain measurement. The system incorporates strain gauges attached to samples of various materials. When loads are applied, the strain gauges measure deformation-induced changes in electrical resistance. A Wheatstone bridge circuit and data acquisition device are utilized to convert these small resistance variations into quantifiable voltage signals. The instrument is calibrated by determining the mathematical relationships between measured voltages, gauge resistances and induced strains. Materials are then subjected to incrementally increasing loads within the instrument. Recorded strain readings across the loading range provide insight into deformation behavior and stress-strain characteristics. By comparing strain data from multiple samples, conclusions can be drawn regarding relative rigidity, stiffness and ductility. This quantitative instrument permits detailed material characterization and supports selection for applications involving resistance to deformation. Overall, precision metrology is expected to enable material classification and selection.
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References
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