Code development for the computational analysis of crack propagation in structures

Antonios Chatzigeorgiou; Efstathios Theotokoglou; George I. Tsamasphyros

doi:10.3221/IGF-ESIS.53.24

Code development for the computational analysis of crack propagation in structures

Authors

Antonios Chatzigeorgiou School of Applied Mathematical and Physical Sciences, Dept. of Mechanics-Lab. of Testing and Materials, National Technical University of Athens, 5, Heroes of Polytechnion Avenue, Theocaris Bld., Zografou Campus, GR-157 73, Athens, Greece.
Efstathios Theotokoglou School of Applied Mathematical and Physical Sciences, Dept. of Mechanics-Lab. of Testing and Materials, National Technical University of Athens, 5, Heroes of Polytechnion Avenue, Theocaris Bld., Zografou Campus, GR-157 73, Athens, Greece
George I. Tsamasphyros School of Applied Mathematical and Physical Sciences, Dept. of Mechanics-Lab. of Testing and Materials, National Technical University of Athens, 5, Heroes of Polytechnion Avenue, Theocaris Bld., Zografou Campus, GR-157 73, Athens, Greece.

DOI:

https://doi.org/10.3221/IGF-ESIS.53.24

Keywords:

Finite element analysis, Stress intensity factor, Crack tip opening displacement, Fatigue crack growth

Abstract

In this study, the main objective was the creation of a code, which gives the capability to a Finite Element Analysis Program with no built-in crack study tools, to study the propagation of a crack, in a cracked surface. For this purpose, the Finite Element Program FEMAP 11.3.2 with solver the NX NASTRAN has been used, and the proposed code was created, using the Application Program Interface (API) of the program. The Linear Elastic Fracture Mechanics (LEFM) theory has been applied to the code, and can predict, if the crack will propagate, the trajectory of the crack, as well as the number of cycle loads required for the propagation of the crack, for given boundary conditions and loads. Finally, the Stress Intensity Factors (SIF) produced by the program, were compared with results from analytical method. Also, experimental results have been used, for the verification of the results of the trajectory of the propagation, and the cycle loads.

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Published

19-07-2020

Issue

Vol. 14 No. 53 (2020): July 2020

Section

Structural Integrity and Durability of Structures

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.

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How to Cite

Code development for the computational analysis of crack propagation in structures. (2020). Frattura Ed Integrità Strutturale, 14(53), 306-324. https://doi.org/10.3221/IGF-ESIS.53.24