Fringe projection technique and liquid penetrant testing for the identification of mechanical discontinuities

This file is the author manuscript version of the article published as: Sanchez-Torres, M., Sánchez-González, J. L. J., Rayas-Alvarez, J. A., & Martínez-García, A. (2022). Fringe projection technique and liquid penetrant testing for the identification of mechanical discontinuities. Asian Journal of Physics, 31(8), 799–806. The main problem with fractures in materials which have different properties is that the presence of cracks can modify local stresses in such a way that the elastic stress analyses performed by designers on such materials can prove to be inaccurate. When a crack reaches a certain critical length, it can propagate catastrophically through the structure, even if the total stress is less than the amount that would normally cause an altered performance or flaws in a tensile specimen; hence, the design of a component or structure often demands minimizing the possibility of defects in the materials. The presence of flaws in metals is a complex subject, which can only be dealt with through fractures or other relevant phenomena; thus, the present work describes the results of measuring fractures by means of the fringe projection technique. A square shaped aluminum specimen was clamped on three corners while a mechanical load was applied to the remaining corner, causing out-of-plane displacements in the specimen; and a fluorescent liquid penetrant inspection test was performed on the same sample. Finally, the finite element method was performed with the SolidWorks software to simulate the behavior of the plate when subjected to the experimental loading conditions mentioned above