Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
Numerical and experimental study of ductile fracture using specimens in asymmetric four-point bending.
Submission Author:
Daniel Lopez Giraldo , SP , Brazil
Co-Authors:
Daniel Lopez Giraldo, diego sarzosa
Presenter: diego sarzosa
doi://10.26678/ABCM.MECSOL2022.MSL22-0146
Abstract
The experimental determination of the fracture toughness of ductile materials under load mode I, based on the behavior of the J-integral, was extensively formalized in ASTM E 1820-18 and in ESIS procedure P1-92. However, regarding to combined loading modes, generally accepted rules for the evaluation of fracture toughness are still lacking, despite their importance in many engineering situations. It is known that the measurement of fracture toughness based on the J-integral is highly dependent on the combined loading mode, the geometry of the tested sample and the general state of strain/stress of the crack-tip sample. This research consists of the development of an experimental protocol for the four-point asymmetric bending test, by means of which it is possible to study the response to fracture of metallic materials under combined loading modes. The reliability of the results will be evaluated by comparing experimental and computational tests with different settings of the experimental and numerical studies. Numerical analyses using the finite element method are performed to define the test conditions and characterize the mechanical response of the material. The preliminary results are favorable to the proposed methodology, presenting consistency between computational results and experimental results presented in the open literature.
Keywords
fracture, tenacity, Bending, asymmetry, Finite Elements
