Computational two-dimensional modeling of the stress intensity factor in a cracked metallic material

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Rolón, J.E.^1 ; Cendales, E.D.^1 ; Cruz, I.M.^2

Fundación Universitaria Los Libertadores, Bogotá, Colombia^1

Universidad ECCI, Bogotá, Colombia^2

关键词: Computational model;    Engineering materials;    Mechanical behavior;    Mechanical elements;    Method of finite elements;    Numerical approximations;    Stress concentration factors;    Two dimensional model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012070/pdf
DOI  :  10.1088/1742-6596/687/1/012070

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Cracking of metallic engineering materials is of great importance due cost of replacing mechanical elements cracked and the danger of sudden structural failure of these elements. One of the most important parameters during consideration of the mechanical behavior of machine elements having cracking and that are subject to various stress conditions is the stress intensity factor near the crack tip called factor Kic. In this paper a computational model is developed for the direct assessment of stress concentration factor near to the crack tip and compared with the results obtained in the literature in which other models have been established, which consider continuity of the displacement of the crack tip (XBEM). Based on this numerical approximation can be establish that computational XBEM method has greater accuracy in Kic values obtained than the model implemented by the method of finite elements for the virtual nodal displacement through plateau function.