Study on the impact of lack of fusion in the fillet weld on its fatigue strength under various load combinations

Main Article Content

Kwiryn Wojsyk
Jerzy Nawrocki


The article refers to the issue of incomplete penetration in T-joints allowed by the obligatory Eurocode EN 1993-1-8. Based on it, the joint’s model was made, and then they were FEM simulated in various load combinations. As a result of this simulation, a Whöller's welded joints diagram was obtained. In the experimental part a T-joint was made. A static tensile test was carried out on it, which showed the areas of stress concentration and plasticization anticipated earlier during the simulation. The study concluded that the lack of mutual penetration of fillet welds generates a significant fatigue score.


Download data is not yet available.

Article Details

How to Cite
K. Wojsyk and J. Nawrocki, “Study on the impact of lack of fusion in the fillet weld on its fatigue strength under various load combinations”, Weld. Tech. Rev., vol. 92, no. 1, pp. 17-24, Jan. 2020.


Mikno Z., Bartnik Z., Lange A., Sikorski M., Selected problems FEM modeling of steel sheet projection welding (in polish), Welding Technology Review, 2012, Vol. 84(10), 2012, 78–85.

Kik T., Slováček M., Wyględacz B., Numerical analysis of multipass T-joint welding and post welding heat treatment (in-polish), Welding Technology Review, 2016, Vol. 88(5), 101–106. DOI:10.26628/ps.v88i5.622

Tso-Liang Teng, Chin-Ping Fung, Peng-Hsiang Chang, Wei-Chun Yang, Analysis of residual stresses and dis-tortions in T-joint fillet welds, International Journal of Pressure Vessels and Piping, 2001, Vol. 78(8), 523–538. DOI:10.1016/S0308-0161(01)00074-6

Brennan F.P., Peleties P., Hellier A.K., Predicting weld toe stress concentration factors for T and skewed T-joint plate connections, International Journal of Fatigue, 2000, Vol. 22(7), 573–584. DOI:10.1016/S0142-1123(00)00031-1

Perić M., Tonković Z., Rodić A., Surjak M., Garašić I., Boras I., Švaić S., Numerical analysis and experimental investigation of welding residual stresses and distortions in a T-joint fillet weld, Materials & Design, 2014, Vol. 53, 1052–1063. DOI: 10.1016/j.matdes.2013.08.011

Nawrocki J., Słania J., Simulation of the stress field in the welded joint using FEM, Welding Technology Review, 2018, Vol. 90(8), 62–67. DOI: 10.26628/ps.v90i8.926

Bijlaard F., Eurocode 3, a basis for further development in joint design, Journal of Constructional Steel Research, 2006, Vol. 62(11), 1060–1067. DOI: 10.1016/j.jcsr.2006.06.012

Jurčíková A., Rosmanit M., FEM Model of Joint Consisting RHS and HEA Profiles, Procedia Engineering, 2012, Vol. 40, 183–188. DOI: 10.1016/j.proeng.2012.07.077

Draper J., Modern Metal Fatigue Analysis, EMAS Warrington, England, 2008, 154–196.

Susmel L., Modified Wöhler curve method, theory of critical distances and Eurocode 3: A novel engineering procedure to predict the lifetime of steel welded joints subjected to both uniaxial and multiaxial fatigue load-ing, I International Journal of Fatigue, 2008, Vol. 30(5), 888–907. DOI: 10.1016/j.ijfatigue.2007.06.005

Sonawane R.B., Mankar R.L., Hredeya M. Introduction to finite element analysis of fillet welded joints, Interna-tional Journal for Research in Applied Science & Engineering Technology, 2017, Vol. 5(12), 363-366.

Teng T.L., Fung C.P, Chang P.H., Yang W.C., Analysis of residual stresses and distorsions in T-joint fillet welds, International Journal of Pressure Vessels and Piping, 2001, Vol. 78(8), 523-538. DOI:10.1016/S0308-0161(01)00074-6

Wojsyk K., Kudła K, Consequences of stiffening of welded structures subjected to fatigue load and ways of eliminating negative operational effects (in polish), XXV National Scientific Welding Conference, Poland, Międzyzdroje 2019.