Identification of asymmetric constitutive laws at high temperature based on Digital Image Correlation |
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| Authors: | Paul Leplay Julien Réthoré Sylvain Meille Marie-Christine Baietto |
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| Affiliation: | 1. Université de Lyon, CNRS INSA-Lyon, LaMCoS UMR 5259, 69621 Villeurbanne, France;2. Université de Lyon, CNRS INSA-Lyon, MATEIS UMR 5510, 69621 Villeurbanne, France;3. Saint-Gobain, CREE, 550 av. Alfred Jauffret – BP 20224, 84306 Cavaillon, France;1. Department of Architectural Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Republic of Korea;2. Department of Construction Technology, DSME Construction Co., Ltd., ELCRU Building, 636 Nonhyun-ro, Gangnam-gu, Seoul 135-010, Republic of Korea;1. Politecnico di Torino, Dipartimento di Sistemi di Produzione ed Economia dell’Azienda,Corso Duca degli Abruzzi 24, 10129 Turin, Italy;2. Department of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, 20156, Milan, Italy;1. Department of Mechanical Engineering, National Cheng Kung University, 1 University Rd, Tainan 701, Taiwan;2. Center for Micro/Nano Science and Technology, National Cheng Kung University, 1 University Rd, Tainan 701, Taiwan;3. Institute of Oral Medicine & Department of Stomatology, College of Medicine and Hospital, National Cheng Kung University, 138 Sheng-Li Road, Tainan 70403, Taiwan;1. Norwegian University of Science and Technology (NTNU), Department of Structural Engineering, Structural Impact Laboratory (SIMLab), Centre for Research-based Innovation (CRI), Rich. Birkelandsvei 1A, Trondheim 7491, Norway;2. Norwegian Defence Estates Agency, Research & Development Department, PB 405, Sentrum, NO-0103 Oslo, Norway;1. School of Materials Science and Engineering, Xiangtan University, Hunan 411105, PR China;2. Department of Earth and Environmental Engineering, Columbia University, NY 10027, United States;3. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, PR China;4. State Key Lab for Turbulence and Complex Systems, Peking University, Beijing 100871, PR China |
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| Abstract: | The mechanical characterization of ceramics can be very challenging. Depending on their composition and fabrication process, ceramic materials may exhibit at room temperature different types of mechanical behaviours, ranging from linear elastic to quasi-brittle, like rocks, concrete or plasters. At elevated temperature, they may present a non-linear behaviour, due for instance to the presence of a vitreous phase. However, estimating the evolution of their behaviour from room temperature to elevated temperature is a challenging topic, especially when there is an asymmetry between tension and compression. A methodology based on Digital Image Correlation is presented in this paper where four point bending tests are analysed for temperatures ranging from 25 °C to 900 °C. For a ceramic mainly made of aluminium titanate, the evolution of an asymmetric constitutive law is identified with a strong link with microstructural observations using SEM images. |
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