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The Numerical Simulation of Aviation Structure Joined by FSW

Lacki P., Adamus K., Winowiecka J.

Archives of Metallurgy and Materials

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2019

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Vol. 64, iss. 1

387--392

EN

This work presents a numerical simulation of aviation structure joined by friction stir welding, FSW, process. The numerical simulation of aviation structure joined by FSW was created. The simulation uses thermomechanical coupled formulation. The model required creation of finite elements representing sheets, stiffeners and welds, definition of material models and boundary conditions. The thermal model took into account heat conduction and convection assigned to appropriate elements of the structure. Time functions were applied to the description of a heat source movement. The numerical model included the stage of welding and the stage of releasing clamps. The output of the simulation are residual stresses and deformations occurring in the panel. Parameters of the global model (the panel model) were selected based on the local model (the single joint model), the experimental verification of the local model using the single joint and the geometry of the panel joints.

2

Aviation Structure With a Magnetorheological Elastomer

Skalski P.

Machine Dynamics Research

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2016

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Vol. 40, No. 3

123--130

EN

In the paper the application of a magnetorheological elastomer (MRE) in an aviation structure was presented. The prototype of the aviation structure with MRE was described. The original, carbon composite model set a reference value of both lift and drag coefficients for an E214 profile. Experiments were conducted in order to evaluate the influence of the magnetorheological elastomer (placed on a surface of a wing) on the overall performance. Results of experiments were depicted and discussed.

3

Rozwój przemysłu lotniczego w przedwojennej Polsce

Szczepaniak R.

Kwartalnik Bellona

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2016

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Nr 1

195--209

PL

Autor przybliża zagadnienie rozwoju przemysłu lotniczego w Polsce przed II wojną światową. Za punkt wyjścia przyjmuje rok 1918, kiedy to została powołana Sekcja Żeglugi Napowietrznej Ministerstwa Spraw Wojskowych. Opisuje zakłady lotnicze, w których powstawały pierwsze polskie samoloty oraz zakłady, w których początkowo produkowano silniki na licencjach, a następnie krajowe zespoły napędowe. Do rozwoju przemysłu lotniczego w II Rzeczypospolitej przyczyniły się także instytuty naukowe, które sprawowały między innymi nadzór techniczny nad produkcją, zajmowały się badaniami aerodynamicznymi samolotów i szybowców oraz prowadziły własne prace naukowo-badawcze nad płatowcami i silnikami. Autor ukazuje problemy, z którymi borykał się przemysł lotniczy: brak funduszy i wielki kryzys ekonomiczny 1929 roku. Mimo trudności przedwojenny polski przemysł lotniczy się rozwijał i dobrze funkcjonował do wybuchu II wojny światowej.

EN

The author discusses the development of the aviation industry in Poland before World War II. His starting point is 1918, the year of establishing the Air Navigation Section of the War Office. The author describes aviation plants where fire Polish aircraft were produced, as well as plants which initially produced engines under licenses, and later Polish drive units. Scientific institutes also contributed greatly in the development of the Polish aviation industry in the Second Polish Republic. They provided technical supervision of the production processes, carried out aerodynamic tests of aircraft and gliders, and conducted their own scientific research on airframes and engines. The author describes problems of the aviation industry lack of funds and the great economic crisis of 1929. Despite difficulties, the Polish pre-war aviation industry developed and functioned well until the break-out of World War II.

4

Application of a magnetorheological elastomer in an aviation structure

Skalski P.

Journal of KONES

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2016

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Vol. 23, No. 3

449--455

EN

Magnetorheological elastomers have properties that can be altered by magnetic field. Many materials were invented more than 30 years ago, but their development and improvement over the past three decades has led to new, more varied uses of these adaptable materials. The main goal of the paper is to present and investigate the application of a magnetorheological elastomer in an aviation structure. The potential advantage of this solution is a possibility to adjust the shape of the wing during the flight by altering the magnetic field strength, which in turn causes deflection of a magnetorheological elastomer. For the purpose of the investigations, an E214 aerofoil has been selected. The original, carbon composite model set a reference value of both lift and drag coefficient for an E214 profile. A thin layer of magnetorheological elastomer was placed on the upper side of the reversed wing. In order to fully understand the effect of such structural change on an aerial profile, the new research stand was designed and manufactured for the purpose of this research in the Institute of Aviation. Experiments were conducted due to evaluate the influence of magnetorheological elastomer on the overall performance. Results of investigations were presented and discussed.