Wyniki wyszukiwania - BazTech

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Prediction of welding-induced distortion of fixed plate edge using design of experiment approach

Urbański Tomasz, Banaszek Andrzej, Jurczak Wojciech

Polish Maritime Research

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2020

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nr 1

134--142

EN

The paper presents the results of experimental studies on distortion of the fixed plate edge due to formation of a butt joint. This is a hidden form of weld distortion present in structural nodes and identified at the ship hull pre-fabrication stages. The investigations were performed according to a design of experiment (DoE) approach in laboratory conditions resembling those encountered in the shipbuilding industry. The presented analysis includes the technological‒construction parameters influencing the evaluated distortion shape. The implemented method of experimental results evaluation allows the utilisation of the approximation dependence to predict the fixed plate edge distortion in large-scale steel structures.

2

Analysis of assembly suitability of the hybrid node based on weld distortion prediction models

Urbański T.

Advances in Science and Technology. Research Journal

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2015

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Vol. 9, nr 27

28--34

EN

The article presents an analysis of assembly suitability of the innovative hybrid node. Weld distortions are a factor that affects significantly the quality of a structure during its pre-fabrication stage, thus increasing manufacturing costs . For the purposes of this analysis, such distortion forms were chosen that are the highest-ranking ones in the technological hierarchy. The analysis was performed taking advantage of significant parameters in order to demonstrate the possibilities of using mathematical models determined on the basis of a designed experiment to modify the construction technology as early as during the stage of the hybrid node’s manufacture. It was shown that using the above-mentioned theoretical models a technological assessment of the structural component can be performed by selecting such system of parameters that will produce distortions at a level acceptable from the point of view of further assembly suitability.

3

Analiza naprężeń i deformacji w cienkich blachach tytanowych podczas spawania wiązką elektronów

Adamus K., Lacki P., Dudek A.

Obróbka Plastyczna Metali

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2014

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T. 25, nr 2

113--126

PL

W pracy przedstawiono termiczno-mechaniczną analizę procesu spawania wiązką elektronów. W procesie spawania połączono dwie cienkie blachy wykonane z różnych gatunków tytanu, Grade 2 i Grade 5. W wyniku spawania powstały znaczne deformacje blach. Model numeryczny został opracowany na podstawie Metody Elementów Skończonych, MES. Model oblicza wpływ obciążenia termicznego na pole naprężeń i przemieszczeń. Wyniki uzyskane za pomocą modelu numerycznego zostały porównane z wynikami badań eksperymentalnych. Obliczone pole naprężeń zweryfikowano poprzez porównanie obliczonych naprężeń własnych z naprężeniami zmierzonymi na powierzchni blach za pomocą metody dyfrakcji rentgenowskiej.

EN

This paper presents a thermo-mechanical analysis of an electron beam welding process. During the process two thin sheets made of dissimilar titanium grades, Grade 2 and Grade5, were joined together. The welding processes introduced significant distortions into the sheets. The numerical model is based on finite element method. The model calculates the impact of thermal load on stress and displacement fields. The results calculated by the model were compared with the experimental results. The calculated stress field was verified by comparing residual stresses at the external surface in a given cross-section with stress values obtained by x-ray diffraction measurements.