The sensitivity of strain gauges when used in the plastic range |
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| Affiliation: | 1. Department of Mechanical Engineering, Motilal Nehru National Institute of Technology Allahabad, Prayagraj-211004,India;2. Department of Applied Mechanics, Motilal Nehru National Institute of Technology Allahabad, Prayagraj -211004,India;3. Department of Electrical Engineering, Motilal Nehru National Institute of Technology Allahabad, Prayagraj-211004,India;4. Department of Mechanical Engineering, Kamla Nehru Institute of Technology Sultanpur 228118, India;1. Departamento de Ciências Exatas, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, São Paulo, Brazil;2. Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, São Paulo, Brazil;3. Universidade Anhanguera, Uniderp, Campo Grande, Mato Grosso do Sul, Brazil;4. Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil;5. ANCP- Associação Nacional dos Criadores e Pesquisadores, Ribeirão Preto, São Paulo, Brazil |
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| Abstract: | The sensitivity behaviour of three types of high elongation strain gauge has been established experimentally. The gauges were bonded to a variety of testpiece materials and calibrated in uniaxial stress fields of tension and bending. It is shown from loading and unloading cycles within the plastic range that three sensitivity factors can be identified. These relate elastic, plastic and total resistance change responses to their respective strain components. The variation in each sensitivity factor with applied strain is examined both experimentally and theoretically. Gauges operate most reliably when their separate responses are co-linear. |
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