Title
Calibration of NASGRO equation for mixedmode loading using experimental and numerical data
Date Issued
01 January 2020
Access level
open access
Resource Type
journal article
Publisher(s)
Universidad de Antioquia
Abstract
A procedure to calibrate the NASGRO equation in a high yield-strength steel under mixed-mode loading (I+II) is presented. The calibration consists in obtaining the material parameters known as C, m, p and q. The procedure is based on experimental and numerical results. The experimental tests were used to characterize the material and obtain fatigue crack growth data. For the fatigue tests, tapered double cantilever beam (TDCB) specimens with different maximum load and load ratio values were used. Through the numerical analysis, the stress intensity factors, the crack growth direction and the crack path coordinates were calculated. The numerical analysis was performed using XFEM and the maximum energy release rate criterion. The calibrated model allows predicting the number of load cycles with an RMS value of less than 5%, compared with the experimental results.
Start page
65
End page
77
Issue
97
Language
English
OCDE Knowledge area
Estadísticas, Probabilidad
Subjects
Scopus EID
2-s2.0-85087056266
Source
Revista Facultad de Ingenieria
ISSN of the container
01206230
Sponsor(s)
To the Research Management Direction (DGI) at Pontificia Universidad Católica del Perú (PUCP), for the financial support for this investigation. To the Computer Aided Research Group (INACOM) of Mechanical Engineering Section at PUCP, for providing the hardware and software used in numerical simulations. To the Welding Engineering Institute (INGESOLD) and Materials Laboratory of Engineering Department at PUCP, for providing the equipment and materials used in experimental tests.
Sources of information:
Directorio de Producción Científica
Scopus