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Investigation of longitudinal bending distortion of a double-side edge welded fin plate by study of plastic zones

Sudharsanam V., Narayanan C. Sathiya, Shanmugarajan B., Prakash L.

Archives of Civil and Mechanical Engineering

2023

Vol. 23, no. 2

art. no. e88, 2023

The Okerblom’s theory of double-side welded structures states that the resultant longitudinal bending distortion will not be zero in structures that are welded with equal heat input on both the sides of centre of gravity axis, on account of smaller plastically deformed zone near the second weld. However, investigations have not been performed thus far in exploring why such a phenomenon happens. This is the gap that this research work addresses. Accordingly, investigations were made by performing welding on both the edges of a rectangular fin plate using gas metal arc welding (GMAW) both by experimentation and by finite element (FE) simulation using SYSWELD software. Von Mises stress plots and transient strain plots of few elements near the first and second edge of the fin plate were analysed to study their relative influence in causing the plastic deformation of the elements. The analysis showed that the smaller size of the plastic zone formed near the second edge weld was mainly due to the presence of residual tensile strain on the second side elements, formed as result of the weld laid on the first edge of the fin plate.

Modelowanie numeryczne zachowania się spawanych węzłów podatnych z blachami czołowymi

Giżejowski M., Jemioło S.

Inżynieria i Budownictwo

2004

R. 60, nr 11

623-629

Przedstawiono zagadnienia związane z modelowaniem zachowania się stalowych węzłów podatnych ze spawanymi blachami czołowymi. Przeprowadzono syntezę aktualnego stanu wiedzy w zakresie modelowania zachowania się węzłów. Szczególną uwagę zwrócono na sposoby uwzględnienia imperfekcji materiałowych i geometrycznych, pozostających po procesie spawania elementów złącznych węzła. Wskazano na przydatność programu SYSWELD do prowadzenia zaawansowanego modelowania węzłów w celu skatalogowania imperfekcji, możliwych do wykorzystania w praktycznych obliczeniach inżynierskich.

Problems associated with modelling of the behaviour of steel semi-rigid joints composed of welded end plates are discussed. The state-of-the-art in the field of joint modelling is presented. The focus is made on the ways at which the geometric and material imperfections, remaining after the technological process of welding are dealt with in the modelling of joint behaviour aiming in the development of catalogue imperfections for their application in practical engineering computation.