Anti-explosion and anti-shock negative Poisson's ratio gradient composite damping material and preparation method thereof

Abstract

The invention provides an anti-explosion and anti-shock gradient composite damping material with significant negative Poisson's ratio effect and a preparation method thereof. The anti-knock and anti-shock negative Poisson's ratio gradient composite damping material is composed of at least one layered unit structure of inner viscoelastic layer-inner rigid layer-middle elastic layer-outer high-strength layer. An interface connection layer is arranged between two adjacent layers of the composite damping material. The middle elastic layer includes a matrix material and a multi-level heterogeneous fiber preform with a negative Poisson's ratio effect arranged in the matrix material. The multi-level heterogeneous fiber preform is formed by weaving several multi-level heterogeneous fibers in warp and weft. The anti-explosion and anti-shock negative Poisson's ratio gradient composite damping material of the present invention not only greatly improves the resistance to impact damage, but also can absorb high impact energy, avoiding the impact of rigid impact force on internal personnel during the collision impact process. It is of great social significance to achieve the maximum protection of personal safety by causing harm.

Description

technical field [0001] The invention belongs to the field of disaster prevention and mitigation and protective engineering materials, and relates to an anti-explosion and anti-shock material, in particular to an anti-explosion and anti-shock negative Poisson's ratio gradient composite damping material and a preparation method thereof. The anti-explosion and anti-shock negative Poisson's ratio gradient composite damping material can be applied to construction and transportation projects such as motor vehicle impact, ship vehicle impact, aircraft impact, ballistic penetration, conventional weapon explosion, gas explosion, underground comprehensive pipe gallery gas explosion, etc. protection and other fields. Background technique [0002] In recent years, explosions and high-speed impact accidents have occurred frequently at home and abroad, posing serious threats to buildings and even human life and property. This is mainly due to the fact that the explosion accident or impac...

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Problems solved by technology

However, the composite protective plate described in this patent still has the following problems: (1) The parameters of the adjacent two layers of the sandwich structure are quite different, which is easy to cause when the high-speed impact load is applied, due to the loose connection between the layers and the combination Delamination occurs due to low strength, resulting in poor impact resistance

(2) The performance of each layer is still not enough to achieve a large absorption of impact energy. Under the action of high-speed projectiles or explosion shock waves, the effect of absorbing strong dynamic load energy is not ideal

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