Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
RANDOM FIELD GENERATION OF THE MATERIAL PROPERTIES IN A PERIDYNAMIC MODEL
Submission Author:
Leandro Friedrich , RS
Co-Authors:
Leandro Friedrich, Mylena Barcellos da Silva, Ignacio Iturrioz
Presenter: Leandro Friedrich
doi://10.26678/ABCM.COBEM2019.COB2019-0482
Abstract
Simulations based on the peridynamic theory are a promising approach to understand the processes involved in the fracture of different materials. In the case of nonhomogeneous materials, the randomness of the material properties is an important aspect because it can vary the mechanical behavior and the fracture location. This work presents a proposal to simulate 3D random fields characterized by arbitrary probability distributions. The Specific fracture energy (Gf), which is directly related to the critical stretching of peridynamic bonds, is defined as a 3D scalar random field with Weibull probability distribution and correlation length. A plate on traction load illustrates the proposed approach. In this case, the correlation length of the random field is kept constant when the discretization changes. The results show an independence of the fracture pattern for the level of discretization used. Other results contribute to provide a flexibility in the calibration of the peridynamic model response allowing that the fracture patterns and the global material behavior to change.
Keywords
Peridynamic theory, random field generation, Fracture Mechanics
