Analiza pokrytycznych charakterystyk pracy ściskanych cienkościennych płyt kompozytowych z centralnym wycięciem posiadających sprzężenia mechaniczne
Type
Book
Subtype
Monograph
Authors/Creators
Ministerial publisher
Politechnika Lubelska
ISBN
978-83-7947-433-2
Date
2020
Abstract PL
W monografii omówiono zagadnienie dotyczące pracy płyt z centralnym
wycięciem, wykonanych z kompozytu węglowo-epoksydowego, poddanych
ściskaniu. Badaniom poddano płyty w symetrycznym i niesymetrycznym układzie
warstw kompozytu, wykonane techniką autoklawową. Miały one na celu
wymuszenie stabilnej pracy płyty w zakresie pokrytycznym według wyższej,
giętno-skrętnej postaci utraty stateczności. Badano wpływ wymiarów centralnego
wycięcia (szerokości i wysokości) oraz układu warstw kompozytu na pokrytyczne
reprezentatywne ścieżki równowagi konstrukcji siła-ugięcie (mierzone na
kierunku prostopadłym do płaszczyzny płyty). Analizowano możliwość pracy
elementu płytowego z centralnym wycięciem jako elementu sprężystego
o określonej charakterystyce pokrytycznej.
Zastosowana metodyka badań obejmowała badania eksperymentalne
prowadzone na fizycznych modelach konstrukcji oraz obliczenia numeryczne
z wykorzystaniem metody elementów skończonych – oprogramowanie ABAQUS®
.
Prowadzone badania dotyczyły analizy stanów krytycznych oraz pracy konstrukcji
w stanie pokrytycznym w zakresie obciążenia zapewniającego bezpieczną pracę
płyty jako elementu sprężystego. Wartość maksymalnego obciążenia konstrukcji
określano na podstawie naprężeniowego kryterium zniszczenia materiałów
kompozytowych Tsai-Wu.
Otrzymane wyniki badań potwierdziły słuszność opracowanych modeli
dyskretnych konstrukcji oraz zastosowanych metod badawczych z wykorzystaniem
zjawiska sprzężeń mechanicznych w materiale kompozytowym, umożliwiających
uzyskanie utraty stateczności ściskanej płyty z centralnym wycięciem według
giętno-skrętnej postaci wyboczenia.
Abstract EN
The study investigates the issue of work of plates with central cut-out,
made of carbon-epoxy composite, subjected to compression. Tests were
performed on plates in a symmetrical and asymmetrical arrangement of
composite layers, produced by the autoclave technique. The research were
aimed at forcing the stable work of plate in the postcritical range according
to the higher, bending-torsional form of loss of stability. The influence of
the dimensions of the central cut-out (width and height) and the
arrangement of composite layers on the postcritical representative
equilibrium paths force-deflection of the structure (measured in direction
perpendicular to the plane of the plate) was investigated. The possibility
work of plate element with a central cut-out as an elastic element with
specific postcritical characteristics was analyzed.
The applied research methodology included experimental research
conducted on physical construction models and numerical calculations
with using the finite element method – ABAQUS® software. The conducted
research concerned the analysis of critical states and the work of the
structure in postcritical state in terms of load ensuring safe work of the
plate as a spring element. The value of the maximum load of the structure
was determined on the basis of the stress criterion of composite damage
Tsai-Wu.
The obtained test results confirmed the correctness of the developed
discrete models of structures and the applied research methods using the
phenomenon of mechanical couplings in the composite material, enabling
the loss of stability of the compressed plate with a central cut-out according
to the flexural-torsional buckling form.The study investigates the issue of work of plates with central cut-out,
made of carbon-epoxy composite, subjected to compression. Tests were
performed on plates in a symmetrical and asymmetrical arrangement of
composite layers, produced by the autoclave technique. The research were
aimed at forcing the stable work of plate in the postcritical range according
to the higher, bending-torsional form of loss of stability. The influence of
the dimensions of the central cut-out (width and height) and the
arrangement of composite layers on the postcritical representative
equilibrium paths force-deflection of the structure (measured in direction
perpendicular to the plane of the plate) was investigated. The possibility
work of plate element with a central cut-out as an elastic element with
specific postcritical characteristics was analyzed.
The applied research methodology included experimental research
conducted on physical construction models and numerical calculations
with using the finite element method – ABAQUS® software. The conducted
research concerned the analysis of critical states and the work of the
structure in postcritical state in terms of load ensuring safe work of the
plate as a spring element. The value of the maximum load of the structure
was determined on the basis of the stress criterion of composite damage
Tsai-Wu.
The obtained test results confirmed the correctness of the developed
discrete models of structures and the applied research methods using the
phenomenon of mechanical couplings in the composite material, enabling
the loss of stability of the compressed plate with a central cut-out according
to the flexural-torsional buckling form.The study investigates the issue of work of plates with central cut-out,
made of carbon-epoxy composite, subjected to compression. Tests were
performed on plates in a symmetrical and asymmetrical arrangement of
composite layers, produced by the autoclave technique. The research were
aimed at forcing the stable work of plate in the postcritical range according
to the higher, bending-torsional form of loss of stability. The influence of
the dimensions of the central cut-out (width and height) and the
arrangement of composite layers on the postcritical representative
equilibrium paths force-deflection of the structure (measured in direction
perpendicular to the plane of the plate) was investigated. The possibility
work of plate element with a central cut-out as an elastic element with
specific postcritical characteristics was analyzed.
The applied research methodology included experimental research
conducted on physical construction models and numerical calculations
with using the finite element method – ABAQUS® software. The conducted
research concerned the analysis of critical states and the work of the
structure in postcritical state in terms of load ensuring safe work of the
plate as a spring element. The value of the maximum load of the structure
was determined on the basis of the stress criterion of composite damage
Tsai-Wu.
The obtained test results confirmed the correctness of the developed
discrete models of structures and the applied research methods using the
phenomenon of mechanical couplings in the composite material, enabling
the loss of stability of the compressed plate with a central cut-out according
to the flexural-torsional buckling form.
Keywords PL
płyty cienkościenne
laminaty
kompozyty węglowo-epoksydowe
metoda elementów skończonych
MES
ABAQUS (oprogramowanie)
Keywords EN
thin-walled plates
laminates
carbon-epoxy composites
finite element methods
ABAQUS (software)
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32Downloads Falkowicz, K. (2020). Analiza pokrytycznych charakterystyk pracy ściskanych cienkościennych płyt kompozytowych z centralnym wycięciem posiadających sprzężenia mechaniczne. https://hdl.handle.net/20.500.14629/536
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