Thermoelastic evaluation of composite laminates using digital imaging processing |
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| Affiliation: | 1. Control and Space Mechanics Division, Instituto Nacional de Pesquisas Espaciais, Av. dos Astronautas 1758, CEP 12227-010 Sao Jose dos Campos, SP, Brazil;2. Department of Mechanical Engineering, Instituto Tecnologico de Aeronautica, Praca Marechal Eduardo Gomes 50, CEP 12228-900 Sao Jose dos Campos, SP, Brazil;1. Northwest Institute for Nonferrous Metal Research, Xi׳an 710016, China;2. School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;2. Beijing Institute of Spacecraft System Engineering, Beijing 100094, China;1. School of Mechanical and Building Sciences, Vellore Institute of Technology, Vellore – 632014, India;2. Department of Chemical Engineering, St.Joseph''s College of Engineering, Chennai -600119, Tamil Nadu, India;1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;2. School of Physics and Electric Information, Huaibei Normal University, Huaibei 235000, China;1. Moores UCSD Cancer Center, University of California, San Diego, 3855 Health Sciences Drive, San Diego, CA 92093, USA;2. University of California, San Francisco, 521 Parnassus Avenue, San Francisco, CA 94117, USA;3. Massachusetts General Hospital Center for Global Health, Ragon Institute of MGH, MIT and Harvard, Harvard Medical School, 100 Cambridge, 15th Floor, Boston, MA 02114, USA;4. Department of Physiological Nursing/UCSF, 2 Koret Way – N631Y, San Francisco, CA 94143-0610, USA;5. Division of General Internal Medicine, San Francisco General Hospital, 1001 Potrero Avenue, SFGH 10, San Francisco, CA 94143, USA |
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| Abstract: | The study of the variation of the curvature of non-symmetric composite laminates with temperature provides a measure of the magnitude of the thermal stresses and the mechanical behavior of the material with temperature. In the present work, an experimental method based on the pioneer use of a digital camera and image processing method is proposed to perform such measurements. Taking advantage of the method and by comparing experimental and CLT, extended-CLT and FEM simulation results, an evaluation of the residual stresses is described and an approach providing more precise determination of the residual thermal stresses in non-symmetric laminates is proposed. |
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