Method for calculating axial compressive stress of novel quadrilateral chiral honeycomb

Abstract

The invention provides a method for calculating axial compressive stress of a novel quadrilateral chiral honeycomb. The method comprises the following steps: step 1, based on geometric configuration of the quadrilateral chiral cell-element honeycomb, calculating total energy absorbed by a telescopic unit; step 2, calculating total energy absorbed by four additional plane units; and step 3, based on the total energy absorbed by the telescopic unit and the total energy absorbed by the four additional plane units, which are calculated in the steps 1 and 2, calculating the axial compressive stress of the quadrilateral chiral cell-element honeycomb under axial compression according to an energy conservation principle. According to the method, a theoretical method for calculating the axial compression stress is given out in combination with a super folding unit theory based on the energy conservation principle, and the axial compression of the quadrilateral chiral cell-element honeycomb is simulated by applying a finite element simulation technology, so that the correctness of the theoretical calculation method is verified.

Description

technical field [0001] The patent of the present invention relates to a quadrilateral chiral cell honeycomb material, specifically a method for calculating the axial compressive stress of a quadrilateral chiral novel honeycomb. Background technique [0002] Because of its light weight and good energy absorption properties, honeycomb materials are often used to make various energy absorption or buffer devices, and are widely used in the fields of aerospace and vehicle engineering. Honeycomb materials can absorb a large amount of impact energy when subjected to axial impact. With the increasing application of honeycomb materials in protective structures, the research on the axial compression characteristics of honeycomb materials during impact has become one of the key issues in their performance design. [0003] The axial impact mechanical properties of honeycomb structure are closely related to its geometric configuration. In order to improve the energy absorption capacity...

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Problems solved by technology

However, the current research work is mainly focused on predicting its quasi-static mechanical properties and explaining its deformation mechanism, and there is still a lack of understanding of the dynamic mechanical properties of it when it is used as an energy-absorbing device material under external axial impact in practical applications.

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