Abstract

SERRANO AGUIAR, Carlos; CALISPA AGUILAR, Marcelo  and  CASTRO REVELO, Jonathan. Effect of pore diameter on tensile stress of welded ASTM A36 steel joints. Ingeniería Mecánica [online]. 2021, vol.24, n.3, pp. 39-46.  Epub Nov 17, 2021. ISSN 1815-5944.

This study aimed to evaluate the effect of pore diameter described in the API 1104 standard (American Petroleum Institute) on the tensile stress of a ASTM A36 steel welded joint. In the study, standardized samples with different diameters of induced internal pores were obtained. The discontinuities were formed with inclusions of spheres of ceramic material Al2O3 of different diameters. Using visual inspection, the absence of surface discontinuities was verified. Furthermore, the presence of porosities and also the absence of other types of internal discontinuities were verified by industrial radiography. Additionally, a numerical simulation to analyze the stresses involved in the welded joint was included using the finite element method. This simulation was used to validate and extrapolate the values obtained in the experimentation process. The results showed that the ultimate tensile stress, both experimentally and from the simulation has a difference of less than 3%, it was also concluded that the diameter of the pores has a behavior inversely proportional to the ultimate stress.

Keywords : weld discontinuities; tensile test; mechanical properties; finite element method, FEM; pores.

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