Numerical Study of the Plastic Zone at the Crack Front in Cylindrical Aluminum Specimens Subjected to Tensile Loads.

Autor: Abatta-Jacome L; Department of Civil Engineering, Materials and Manufacturing, School of Engineering, University of Malaga, 29071 Málaga, Spain.; Department of Energy Sciences and Mechanics, University of the Armed Forces ESPE, Sangolquí 171103, Ecuador., Lima-Rodriguez A; Department of Civil Engineering, Materials and Manufacturing, School of Engineering, University of Malaga, 29071 Málaga, Spain., Gonzalez-Herrera A; Department of Civil Engineering, Materials and Manufacturing, School of Engineering, University of Malaga, 29071 Málaga, Spain., Garcia-Manrique JM; Department of Civil Engineering, Materials and Manufacturing, School of Engineering, University of Malaga, 29071 Málaga, Spain.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2023 Oct 19; Vol. 16 (20). Date of Electronic Publication: 2023 Oct 19.
DOI: 10.3390/ma16206759
Abstrakt: Cylindrical specimens are of great interest in analyzing mechanical elements' behavior and investigating phenomena with biaxial loads. It is necessary to identify the behavior of the crack front along the thickness to interpret these results, which are usually based on the hypothesis of a straight crack and the observation of the outer face of the crack front. Based on the work carried out on compact tension type specimens, this work proposes adapting this methodology to cylindrical specimens, adapting the previous finite element models. Cylindrical specimens provide an asymmetric behavior influenced by the radius, where the CT (compact tensile) specimen can be considered the extreme infinite radius case. Combinations of the load level and radius values help us simulate the crack's behavior under intermediate hypotheses between a plane crack theory and a three-dimensional one. The plastic strain around the crack front will be analyzed as a function of the thickness and the load level applied. The results allow us to validate the numerical methodology and establish the differentiated behaviors of the plastic zones close to the outer and inner radii.
Databáze: MEDLINE
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