Stress Intensity Factor Solutions for CTS Mixed Mode Specimen

Fernando Ventura Antunes; Ricardo Branco; José António Martins Ferreira; Luís Borrego

doi:10.3221/IGF-ESIS.48.64

Stress Intensity Factor Solutions for CTS Mixed Mode Specimen

Authors

Fernando Ventura Antunes Department of Mechanical Engineering, University of Coimbra, Portugal http://orcid.org/0000-0002-0336-4729
Ricardo Branco Department of Mechanical Engineering, University of Coimbra, Portugal http://orcid.org/0000-0001-2345-6789
José António Martins Ferreira Department of Mechanical Engineering, University of Coimbra, Portugal
Luís Borrego Department of Mechanical Engineering, Polytechnic Institute of Coimbra , Portugal

DOI:

https://doi.org/10.3221/IGF-ESIS.48.64

Keywords:

CTS specimen, Stress intensity factor solution, Mixed mode

Abstract

The Compact Tension Shear (CTS) specimen is used to study fracture and fatigue under mixed mode I/II loading conditions. Existing K solution was developed for fracture studies and it does not consider the effect of crack deflection. The aim of present work is to develop K_I and K_II empirical solutions for cracks with different crack length, loading angle and crack orientation. A total number of 1120 cracked geometries were studied numerically by the finite element method and solutions were fitted to numerical predictions. An average difference of 0.53 % was found between numerical predictions and the solution proposed for K_I.For K_II the difference is higher, but the equivalent stress intensity factor showed a difference of only 1% because K_II is lower than K_I. Experimental work was developed to study fatigue crack growth in CTS specimens. The cracks always adopted a direction approximately normal to loading direction, i.e., tend to propagate under mode I.

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Published

10-03-2019

Issue

Vol. 13 No. 48 (2019): April 2019

Section

SI: Portuguese contributions for Structural Integrity

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

Stress Intensity Factor Solutions for CTS Mixed Mode Specimen. (2019). Frattura Ed Integrità Strutturale, 13(48), 676-692. https://doi.org/10.3221/IGF-ESIS.48.64