Influence of actual shape imperfections on strength, loss of stability and load capacity of thin-walled beams and columns with unusual channel sections
- project manager: Piotr PACZOS, D.Sc. Eng., Univ. Prof.
- funds granted: 820 400 PLN
- source of funding: NCN – OPUS 22
- implementation period: 2022-2026
Project description
The subject of the investigation are thin-walled beams and columns with non-standard channel sections subjected to four-point bending and axial compression. Beams and columns are made of cold-rolled sheet using manual and numerically controlled bending machines. Experimental tests will be performed using modern optical methods with the use of the OptoCad, Aramis and Atos systems, which are dedicated for non-contact two- and three-dimensional measurements of deformations as well as image processing of the scanned surface.
The aim of the investigation is to analyze the actual shape imperfections and their influence on the stability and load capacity of thin-walled beams in bending and columns in compression with unusual U-sections. The secondary goal is to assess the usefulness of optical methods in the experimental analysis of thin-walled beams and to compare them with other research methods.
Bionic, lightweight, additively manufactured structural nodes for the automotive industry
- executing entity: Wrocław University of Science and Technology
- project manager at PUT: Michał NOWAK, Prof. D.Sc. Eng.
- partners: Poznan University of Technology, EDAG Engineering Poland Sp z o.o.
- funds granted: 5 769 990 PLN (including PUT – 1 949 738 PLN)
- source of funding: NCBR – TECHMATSTRATEG-III/0044/2019 program
- implementation period: 2021-2024
Project description
In the BioniAMoto project, a bionic tool for topological optimization of structural nodes used in the automotive industry and their production from aluminum alloys using additive technologies (AM) will be tested and prepared for the implementation.
As a result of the project, a concept for the production of spatial nodes of the structural construction of vehicles will be developed, optimized with the use of innovative biomimetic algorithms in terms of obtaining high stiffness, and their connection with easily available and commonly used extruded aluminum profiles.
The goal of BioniAMoto is to achieve equivalent mechanical properties for aluminum alloys processed in AM technologies in relation to the material in a traditional form, to reduce the weight of the structural nodes produced while maintaining their stiffness and strength at a level at least comparable or higher.
In addition, the project will evaluate various variants of connecting incrementally produced elements of nodes with commonly used extruded profiles, without introducing additional thermal stresses at the connection point (such as shape, glued, clamping, etc.)
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A new generation of machines dedicated to the innovative strip-till one-pass technology adapted to smart fields agriculture and agriculture 4.0
- executing entity: Bydgoszcz University of Science and Technology
- third party organisations: Mzuri-Agro sp. z o.o. sp. k., Poznan University of Technology
- funds granted: 11 210 698,11 PLN (including PUT – 4 616 681 PLN)
- source of funding: Program Operacyjny Inteligentny Rozwój
- implementation period: 2021-2023
Project description
The project assumes the implementation of comprehensive R&D works leading to the development of a new generation of hybrid, multifunctional machines dedicated to the innovative strip-till one-pass technology in agrotechnics of field crops adapted to smart fields agriculture and agriculture 4.0.
As a result of the project, automated "smart" machines will be created that respond with operating parameters to the conditions of the agricultural field determined by cooperating sensors in real time and/or to conditions previously identified and mapped. At the same time, these machines with the ability to collect, gather and transmit data from the working environment will become an element of agriculture 4.0 on the farm. The machines will help to achieve two basic goals of modern agriculture: to increase the efficiency of field plant production and to reduce its pressure on the environment.
The scope of work carried out by IAM includes strength analysis of tractor structural elements using the finite element method, laboratory strength tests of selected elements and tensometric measurements during prototype tests.
Development of the construction of a light truck trailer with reduced aerodynamic drag
- scientific project manager: Stefan JONIAK, Prof. D.Sc. Eng.
- funds granted: 2 026 569,60 PLN (including PUT – 860 000 PLN)
- source of funding:European Regional Development Fund
- implementation period: 2017-2020
Project description
The scope of works carried out by IAM includes strength analysis of the trailer using the finite element method, laboratory strength tests of selected elements and strain gauge measurements during prototype tests.
Analysis and optimization of stress distribution in complex shell structures
- project manager: Krzysztof SOWIŃSKI, M.Sc. Eng.
- funds granted: 109 480 PLN
- source of funding: NCN – PRELUDIUM
- implementation period: 2019-2020
Project description
The aim of this project is to analyze and optimize stress distribution in complex, axisymmetric shell structures loaded with pressure. Using the Ritz method, resulting from the principle of stationarity of the total potential energy of the system, the possibility of determining the stress distribution taking into account bending and shear forces for selected, complex shell structures will be presented. The proposed solution will show how the shape of the shell influences the bending effect.
In the following, a parametric model describing the geometry of the pressure vessel parts will be developed. As a result of the use of Matlab and Ansys software, the model will be optimized using a genetic algorithm. Finally, the result obtained through optimization, together with other shells, will be subjected to experimental verification.
Due to the high costs of manufacturing the structure using conventional methods, the shells will be produced using additive techniques. After preparing the measuring station, the pressure-loaded models will be subjected to a strain gauge test. The obtained results will allow to compare the stress distribution in the optimized shell with the shell made of plastic.
Experimental studies of local stability and load capacity of thin-walled beams with non-standard channel sections using new optical methods
- project manager: Piotr PACZOS, D.Sc. Eng., Univ. Prof.
- funds granted: 432 800 PLN
- source of funding: NCN – OPUS 18
- implementation period: 2018-2021
Project description
The project is devoted to extending the application of experimental methods to optical methods of measuring deformation of structures for cold-formed thin-walled beams.
The aim of the project is a comprehensive look at the mechanics of thin-walled beams using experimental methods. Measurements will not be limited only to a few specific points, places where strain gauges are glued, or single parameters (e.g. load). Deformations will be recorded over the entire surface of the beam as in the case of numerical methods based on the finite element method. This will allow for accurate depiction of the phenomena of local and distortional loss of stability which is characteristic for thin-walled, cold-formed beams with open cross-sections.
The obtained experimental results will be compared with the results of numerical analyzes (FEM, FSM) and
analytical formulas. In the first case, thanks to the possibilities of optical methods, the comparison will be both quantitative, i.e. comparing individual characteristics at selected points, and qualitative, i.e. comparing the deformation shape of the entire beam.