Translated Abstract
With the widely use of lightweight porous metal structure material, it’s found that the single geometrical configuration of sandwich structures have their own limitations in applications. Set compressibility as example, corrugated panel structure is easy to fabricate, but the compression performance of the whole structure is limited because of the core’s premature buckling during the out-plane compression processAlthough the energy absorption ability is excellent of available aluminum honeycomb, but the platform stress is usually lower than 3 MPa with the restriction of fabrication process, which limits its application to some extent.In order to combine the advantage performance of aluminum honeycomb and corrugated panel, a new kind of aluminium honeycomb & corrugated composite sandwich structure and its preparation process are proposed in this thesis. Including the moulding pressing process with the platform of corrugated core body in the laboratory, get the composite sandwich structure by epoxy adhesive. Specimens selected from six kinds of relative density of the corrugated sandwich planel and a kind of Al 3003 h18 aluminum honeycomb (porosity 96%) Finish the quasi-static compression test of a series of composite structure by the MTS material testing machine, and compare the performance advantage of the composite structure and the parent structure Using the finite element software ABAQUS to simulate the experiment process of composite structure accurately, the reinforcement mechanism is discussed.The result of this thesis show that: (1) A new composite structure have been designed by inserting honeycomb core into the corrugated panel. It was found that the composite structure had much improved compressive strength and plateau stress compared to the sum of those of the corrugated panel and the honeycomb alone in the quasi-static compressive experiments. (2) The numerical simulation results shows that the honeycomb cores have obvious plastic deformation in the peak stress of the composite structure, but corrugated core not.The supporting effect of the honeycomb core changed the damage mode, namely, the elastic buckling to the yield failure (3) The effects of corrugated and honeycomb basic materials thickness on the composite structure compression performance have been calculated by numerical simulation The effect showed in the results is opposite of the honeycomb and corrugated on the structure specific strength and specific energy absorptionWith the strength of honeycomb core enhanced, leading to the specific strength and specific energy absorption of composite structure enhancement.
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