Three-dimensional anti-impact body with negative Poisson's ratio characteristic and design method thereof

Abstract

The invention provides a three-dimensional anti-impact body with a negative Poisson's ratio characteristic and a design method thereof. According to the three-dimensional impact-resistant body, a plurality of cell body units are arranged in a three-dimensional space to form a multi-layer annular structure with straight ribs in the radial direction. Each cell body unit is formed by orthogonally connecting a bilateral concave quadrilateral structure with a circular ring rib and a bilateral concave quadrilateral structure with a straight rib. The bilateral concave quadrilateral structure containing the circular ring ribs is formed by connecting a pair of circular ring ribs and a pair of annular concave arc ribs connected between the circular ring ribs; the bilateral concave quadrilateral structure containing the straight ribs is formed by connecting a pair of straight ribs and a radial concave arc rib connected between the straight ribs. The structure obtained by the invention can be applied to a space carrier and a space effective load which are impacted by launch and orbital transfer, and the impact resistance can be greatly improved.

Description

technical field [0001] The invention relates to a three-dimensional impact-resistant body with negative Poisson's ratio characteristics and a design method thereof, belonging to the technical field of negative Poisson's ratio materials. Background technique [0002] Aerospace vehicles and space payloads will encounter severe shocks during transportation, launch, separation of multi-stage capsules, satellite orbit changes using rocket boosters, and landing back to Earth. For unreasonably designed systems in aircraft and payloads, especially optomechanical systems with particularly high performance requirements, these shocks can cause temporary or permanent damage to components related to optical alignment in the optomechanical system. [0003] The current methods for aerospace vehicles and space payloads to deal with shocks are: use isolation subsystems in important parts, that is, design shock-resistant brackets; increase the load-bearing area as much as possible, so that th...

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Problems solved by technology

[0007] In order to solve the problems of the existing large-tonnage aerospace vehicles and space payloads in the process of launching and changing orbits for deep space exploration missions, the important parts of the system are crushed by the impact and cannot bear the impact load uniformly, resulting in stress concentration, etc., the present invention Combining negative Poisson's ratio materials and structures, a three-dimensional impact-resistant body with negative Poisson's ratio characteristics and its design method are proposed

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