13 research outputs found

    Experimental buckling tests of FML profiles.

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    Analytical and Experimental Determination of FML Stiffness and Strength Properties.

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    The paper presents application of analytical methods of determining the mechanical properties of Fibre Metal Laminates. Chosen micromechanical methods were employed to predict elastic moduli and strength of FML panels. Prediction was conducted on two levels i.e. micromechanics where properties of a single composite lamina (prepreg) were analyzed, and macro–mechanics to determine properties of a full FML hybrid material. The properties of a single GFR lamina were predicted by Rule of Mixture Method (ROM), inverse Rule of Mixture Method with correction factor, Halpin Tsai Method, Tsai Method and Wilczynski Method application. Properties of full 3–2 FML lay–up were determined using the Rule of Mixtures. Analytical results were verified by experimental tests. Tensile and bending test were performed on rectangular standard coupons of 3–2 FMLs

    Comparison of failure criteria application for fml buckling strength analysis.

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    Static and Dynamic Thermomechanical Buckling Loads of Functionally Graded Plates.

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    In the paper the buckling phenomenon for static and dynamic loading (pulse of finite duration) of FGM plates subjected to simultaneous action of one directional compression and thermal field is presented. Thin, rectangular plates simply supported along all edges are considered. The investigations are conducted for different values of volume fraction exponent and uniform temperature rise in conjunction with mechanical dynamic pulse loading of finite duration

    Corner radius effect in thin-walled square section columns on the local buckling of walls under axial compression.

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    Local buckling and load carrying capacity of thin-walled multicell beams subjected to bending

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    Static and dynamic buckling of functionality graded plates subjected to thermomechanical loading

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    Wyboczenie dynamiczne cienkościennych słupów z materiałów lepkoplastycznych.

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    Niniejsza praca jest poświęcona wyboczeniu dynamicznemu lub jak w literaturze synonimicznie nazywane jest to zjawisko: stateczności dynamicznej, czy też odpowiedzi dynamicznej cienkościennych konstrukcji płytowych obciążonych impulsem o skończonym czasie trwania. Analizowane są krótkie słupy o zamkniętych przekrojach poprzecznych w kształcie prostokąta. Słupy te są poddane ściskaniu w płaszczyznach ścian składowych impulsem dynamicznym, który może mieć różne kształty. Rozpatrywane są materiały izotropowe i ortotropowe opisane równaniami konstytutywnymi uwzględniającymi wrażliwość materiału na efekt prędkości odkształcenia (EPO). Materiały takie są nazywane materiałami lepkoplastycznymi. Dotychczas zaledwie w kilku pracach rozważano stateczność dynamiczną płyt i powłoki walcowej z materiału lepkoplastycznego. Nie było natomiast analizy konstrukcji złożonej, jaką jest słup o ścianach płaskich, nie dokonano także porównania rozwiązań uzyskanych dla różnych modeli materiału – sprężysto plastycznego ze sprężysto-lepkoplastycznym.This work deals with dynamic buckling or as it is often called in literature: the dynamic instability or dynamic response of thin-walled plate structures under the pulse loading of finite duration. The short columns with closed rectangular cross section are analyzed. These columns are subjected to dynamic compressive pulse in the plane of component walls. This pulse can be of different shape in time. The isotropic or orthotropic materials are discussed, being described by rate-dependent constitutive equations (in Polish, the strain rate effect is described with shortcut EPO). These type of materials are known as viscoplastic. Review of literature shows only few papers considering dynamic buckling of plates and cylindrical shells. There exists no analysis of combined structures – as the column of plate walls is. Until now there was no comparison of solutions obtained for different material models – between elastic-plastic and viscoplastic ones

    Failure analysis of thin-walled glare columns during buckling and postbuckling response

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    Dynamic buckling of FML thin-walled panels

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