Thermo-mechanical coupled in situ fatigue device driven by piezoelectric actuator |
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| Affiliation: | 1. GRF-CFUM, Physics Department, University of Minho, 4800-058 Guimarães, Portugal;2. Center/Department of Physics, University of Minho, 4700-057 Braga, Portugal;3. BCMaterials, Parque Científico y Tecnológico de Bizkaia, 48160 Derio, Spain;4. SEG-CEMUC Mechanical Engineering Department, University of Coimbra, 3030-788 Coimbra, Portugal |
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| Abstract: | This paper focuses on the design of a thermo-mechanical coupled in situ fatigue device driven by piezoelectric actuator. The structural resonances, transient response, grip design and thermal insulation performance of the device are discussed in detail. Micro-indentations are prepared on the specimen’s surface as embedded defects, and the deformation behaviors of the indentation subjected to cyclic strain under temperature of 530 °C are investigated. Quantitative effects of the cross-sectional area of indentation, alternating displacement amplitude and temperature on the fatigue life of copper/aluminum composite specimens are obtained, respectively. The experimental results could serve as proofs to verify the feasibility of the proposed device. This paper shows a modular example that combines piezoelectric actuator and ceramic heating components to realize thermo-mechanical coupled in situ fatigue testing. |
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| Keywords: | In situ testing Fatigue Piezoelectric actuator Thermo-mechanical coupled |
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