Temat: strength method - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Adhesive bonded hot dip zinc coated sheet and titanium sheet joint strength - numerical analysis
Autorzy:: Rudawska, A.
Dębski, H.
Powiązania:: https://bibliotekanauki.pl/articles/248038.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: adhesive joint
finite elements method (FEM)
adhesive joints strength
Opis:: This paper describes a numerical analysis of adhesively bonded hot dip zinc coated sheet and titanium sheet and its comparison with the results of experimental tests. The study aims at presenting a comparative analysis of numerical calculation results with the results of strength test of the joints in question. Numerical simulations are an invaluable extension of experimental tests and, moreover, prove particularly useful at joint designing and analysis stages. The calculations were conducted with ABAQUS Standard software and allowed for the destructive force value obtained in experimental tests. Strength tests were conducted on single-lap adhesive joints for given structural materials; the samples were shear-loaded. The comparison of the results of experimental tests and numerical analysis led us to observe certain inconsistencies in the destructive force values, consequently providing information on the accuracy of a numerical model when compared with the actual model. Geometric model of the analysed single-lap adhesive joint, numerical model of the analysed single-lap adhesive joint, adhesive layer failure criterion description, visualisation of the analysed single-lap joint failure process, visualisation of adhesive joint failure stages of adhesive layer are presented.
Źródło:: Journal of KONES; 2012, 19, 1; 339-345
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Numerical model for calculation of fluctuations in the main-bearing frame of railcar with changing stiffness and physical parameters
Autorzy:: Mukhamedova, Z.
Powiązania:: https://bibliotekanauki.pl/articles/244173.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: railcar
mainframe of the body
analytical-numerical method
reliability
strength
Opis:: This article covers the use of analytical technique of solutions for flexural and longitudinal fluctuations of the bearing framework of a railcar body frame in the form of an elastic core of variable section with a variable weight, flexural and longitudinal rigidity. The calculation is performed for the modernization of the body frame of emergency and repair rail service car, taking into account the variability of section, mass, longitudinal and bending stiffness along the length to prolong the service life of their useful operation. Problems of increasing the reliability and strength of the frames, load-bearing body structure and components for rail vehicles during their design, operation and modernization are extensively studied. An analytical-numerical method based on the dynamic strength of the bearing body frame of emergency and repair rail service car, assuming a beam-type pattern of its fluctuations with elastic fixing of the ends under harmonic load as it moves along the track with periodic joint roughness.
Źródło:: Journal of KONES; 2016, 23, 2; 255-259
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Finite numerical analysis of composite structure under complex loading conditions - optimal ply design of laminate
Autorzy:: Dębski, H.
Powiązania:: https://bibliotekanauki.pl/articles/246147.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: finite element method
laminates
strength of composite structures
composites damage
composites optimization
Opis:: The paper presents FEA numerical analysis of composite structure subjected to complex loading conditions (tension and shear). The layered structures were characterized from the standpoint of optimal selection and strength parameters. The subject of the examinations was a composite: glass fibres reinforcedpolymers-M12/26%/TVR380R-glass prepreg system (Hexcel, R-glass fibres-undirectional, M12 epoxy resin). The composite system is use in helicopter blades. It exhibits good fatigue life and hot/wet performances up to 100° C. The strength properties were investigated according to ISO and ASTM standards. The composites for the study were pro duce d by autoclave technique. The Layup-Ply method with ABAQUS/Standard program was applied as an analysis tool which was carried out the leading of calculation. It was used an incremental iterative Newton-Raphson's method in a range of nonlinear geometric. Numerical calculation was made as a part of introduction to failure analysis composite materials. The risk of laminate's damage could be estimated as a possible appearing in dangerous points of construction. There were taken four criteria: the Maximum Stress Criterion, Tsai-Hill's Criterion, tensor criterion of Tsai-Wu and Azzi-Tsai-HiU's criterion.
Źródło:: Journal of KONES; 2010, 17, 1; 111-115
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Strength analysis of polymer conical gear wheel made with 3D printing technique
Autorzy:: Śpiewak, Szczepan
Awrejcewicz, Jan
Powiązania:: https://bibliotekanauki.pl/articles/243848.pdf
Data publikacji:: 2019
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: exoskeleton
strength analysis
finite element method
FEM
material model of acrylonitrile-co-butadiene-co-styrene
conical gears
Opis:: The article deals with the problem of designing conical gears with a curved line contour. The contour of the tooth flank is described by means of a helix and involutions. In the work, a conical gear designed to drive of the lower limb rehabilitation exoskeleton has analysed. Parameters of the conical gearbox have been adapted to design requirements of the exoskeleton. Gear wheels were made with ABS material using 3D printing technique. The article presents the results of strength calculations obtained using the method classical design of the gear wheals described in the norm ISO 6336-1996. In the strength calculations, bending and contact stresses were taken into account. Creating the contour of gears was aided through the gearbox wizard available in Inventor program. The work contains the results of a static tensile test of the material from which the gear wheels were made. In experimental and numerical studies, the orthotropy of the material used was taken into account. The orthogonal values of the Young’s modulus, the Poisson’s ratio and the Kirchhoff’s modulus were determined. The publication also includes partial results of fatigue tests in the area of normal stresses. In the research used to finite element method (FEM), determine of internal loads in the gear. A structure of the FEM model is described in detail. Maximum values of contact pressures determined by use to FEM models have been compared with the results obtained on the basis of Hertz’s formulas. The article presents basic geometrical and strength parameters of the designed gear. The work demonstrates the validity of the material models used. Limitations in the application of the classic method of calculating conical gears made of orthotropic materials have been indicated. The results of analytical and numerical calculations are presented in tabular and graphical form.
Źródło:: Journal of KONES; 2019, 26, 3; 235-242
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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