Whole-field analysis of uniaxial tensile tests by Moiré interferometry |
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| Authors: | Raúl R Cordero Manuel Franois Ignacio Lira Cristin Vial-Edwards |
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| Institution: | aDepartment of Mechanical and Metallurgical Engineering, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Santiago, Chile;bFaculty of Mechanical and Production Sciences Engineering, Escuela Superior Politécnica del Litoral, Km. 30, 5 Vía Perimetral, Guayaquil, Ecuador;cLaboratoire des Systèmes Mécaniques et d’Ingénierie Simultanée (LASMIS, FRE CNRS 2719), Université de Technologie de Troyes, 12 rue Marie Curie, BP 2060, 10010 Troyes Cedex, France |
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| Abstract: | Moiré interferometry—a high sensitivity whole-field optical technique—was used to follow the evolution of the deformation process of an aluminium sample subjected to a uniaxial tensile test. This technique allowed us to measure the two in-plane displacement components undergone by the sample, to evaluate the strain, stress and rotation fields, and to appreciate the trends in the deformation pattern that characterized the different stages of the test. Through a subtraction process between fields obtained at two different load levels, we were able to identify the area where strains began to localize and to observe the appearance of the diffuse neck. |
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| Keywords: | Moiré interferometry Strain localization Stress fields Tensile tests |
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