Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
ASSESSMENT OF UNCERTAINTY ASSOCIATED WITH YIELD STRENGTH OBTAINED ACCORDING TO ASTM E8/E8M STANDARD
Submission Author:
Joyce Antunes da Silva , MG
Co-Authors:
Joyce Antunes da Silva, Vitor Nakayama de Araújo Pires Ferreira, Bruno de Oliveira Prado, Rafael de Lima Costa, Luciano José Arantes, Vera Lúcia Donizeti de Sousa FRanco, Waldek Wladimir Bose Filho, Rosenda Arencibia
Presenter: Luciano José Arantes
doi://10.26678/ABCM.COBEM2023.COB2023-2415
Abstract
This work aims to evaluate the uncertainty associated with the yield strength of AISI 4340 steel (28 HRC) obtained in accordance with the ASTM E8/E8M standard (ASTM, 2022). In order to popularize the uncertainty calculation associated with this mechanical property, the developed methodology, rooted in the GUM method (Guide to the expression of uncertainty in measurement), was implemented in MATLAB® R2019a and validated. The expanded uncertainty associated with the yield strength, determined through tensile tests for a single specimen was 2.25 MPa, representing 0.3 % of the average (770.47 MPa). The yield strength value resulting from the tensile test of AISI 4340 steel considering three specimens was 776.99 ± 4.90 MPa. The expanded uncertainty, in this case, represents 0.6 % of the average yield strength value. The code developed in MATLAB®R2019a allowed to determine the uncertainty associated with the yield strength in an adequate way. This code makes it possible to popularize the calculation of the uncertainty associated with this important mechanical property. Furthermore, it can serve as a basis (with adaptations) to calculate the uncertainty associated with other measurands.
Keywords
Measurement uncertainty, Yield Strength, GUM
