Wyniki wyszukiwania - BazTech

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Analysis of Thin-Walled Elements, with Ribbed Stiffeners, in the State of Post-Critical Deformations

Mazurek Przemysław

Advances in Science and Technology. Research Journal

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2023

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Vol. 17, no 4

61--69

EN

The paper presents the results of research on fragments of thin-walled coverings made of aluminum alloy. The exmined structures were subjected to shear stresses leading to post-critical deformations. Three types of elements were analyzed: an element without stiffeners (the referencial one), an element with three stiffening ribs and an element with five stiffening ribs. The results of numerical analyzes and static experimental research were presented. Althought this kind of solutions is commonly used in various aircraft structures, the publications about it are usually hard to rich. The research concerning ribbed stiffeners are usually performed inside laboratories of aerospace concerns and their results are not published in the open sources. The general direction of analyses of this solution is indicated in presented study.

2

Fatigue Strength of Thin-Walled Rectangular Elements in the State of Post-Critical Deformation

Mazurek Przemysław

Advances in Science and Technology. Research Journal

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2019

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Vol. 13, no 2

84--91

EN

The paper presents the results of numerical analyses and static experimental testing of thin-walled rectangular elements subject to post-critical deformation under shear conditions. The deliberations concerned the elements made of aluminium alloy and the model material. The obtained stress distribution was used to conduct a numerical simulation of the fatigue strength for a metal plate and testing under cyclic load conditions for both types of models.

3

Post-critical deformation of thin-walled load-bearing aircraft structure representing fragment of the one-way torsion box

Kopecki Tomasz, Lis Tomasz, Mazurek Przemysław

Advances in Science and Technology. Research Journal

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2018

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Vol. 12, no 3

203--209

EN

The paper presents results of research on thin-walled load-bearing structure model representing a fragment of plane wing torsion box. The basis for obtaining data on deformation character and stability loss process was a model experiment conducted using a dedicated experimental stand. On the basis of experiment results, adequate numerical simulations were conducted using software based on finite elements method. Results of non-linear numerical analyses allowed to determine the character of stress distribution and formulate conclusions regarding behaviour of the post-critical deformations of the examined wing part.

4

Buckling deformation of thin layer coverings of small curvatures used in aircraft construction

Kopecki Tomasz, Lis Tomasz, Mazurek Przemysław, Bakunowicz Jerzy

Advances in Science and Technology. Research Journal

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2018

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Vol. 12, no 1

293--302

EN

This paper presents the results of experimental and numerical analysis in terms of the finite element method of plating components of aircraft load bearing structures. The subject matter of the study was composite panels with stiffeners in the form of a regular grid of oriented longitudinal elements in accordance with the directions of the principal stresses in the covering. The analysis was conducted in the buckling states of structural deformation which showed that structures with stiffeners exhibit much more favorable behavior in buckling deformation states than in laminar structures. This translates into stress distributions and their gradients, which are milder in forms of stiffened structures.