CN-122014776-A - Multi-feature bionic and multi-material heterogeneous fused honeycomb structure

CN122014776ACN 122014776 ACN122014776 ACN 122014776ACN-122014776-A

Abstract

The invention provides a multi-characteristic bionic and multi-material heterogeneous fused honeycomb structure, which integrates a soft phase ring structure imitating vegetable sponge fibers and a hard phase double diagonal structure imitating deep sea glass sponge, adopts a reverse material-structure matching strategy of 'hard material printing soft phase structure and soft material printing hard phase structure', fully exerts the complementary advantages of different structures and materials, takes the soft phase ring structure as a main force transmission framework, effectively reduces initial peak force and resists initial deformation by utilizing the low initial modulus characteristic of the soft phase ring structure, and effectively inhibits expansion of a shear band by utilizing the unique topological structure of the hard phase double diagonal structure, thereby realizing stable bearing under high stress level. Compared with the traditional honeycomb structure with single material or single structure, the invention remarkably improves the whole energy absorption capacity and the platform stress while keeping the light weight, and realizes the cooperative reinforcement of the comprehensive mechanical properties of high strength, high energy absorption, low peak force and stable deformation.

Inventors

WANG PENG
LIANG HAO
WANG YIFAN
LI DONG

Assignees

东华大学

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (10)

1.A multi-feature biomimetic and multi-material heterogeneous fused honeycomb structure, comprising: the soft phase structure is formed by arranging a plurality of ring units imitating vegetable sponge fibers in an array manner, wherein the ring units form a multi-layer structure, and the ring units are made of hard materials; The hard phase structure consists of a plurality of double diagonal units imitating deep sea glass sponge, the double diagonal units are in cross connection and distributed among the soft phase structures, and the double diagonal units are made of soft materials; The soft phase structure and the hard phase structure are connected with each other to form a heterogeneous fusion composite honeycomb structure.
2. The multi-feature bionic and multi-material heterogeneous fused honeycomb structure according to claim 1, wherein the shape and the size of the circular ring units are the same, the wall thickness is 0.8mm, the radius is 3.5mm, and the circular ring units form a two-dimensional array in a single-row six-layer and six-layer mode in a two-dimensional plane.
3. The multi-feature biomimetic and multi-material heterogeneous fused honeycomb structure according to claim 2, wherein the two-dimensional array extends in a direction perpendicular to the plane, forming a three-dimensional structure with a height of 20 mm.
4. The multi-feature biomimetic and multi-material heterogeneous fused honeycomb structure of claim 1, wherein the hard material comprising the soft phase structure is a nylon material having a density of 1.01g/cm 3 , a young's modulus of 1200MPa, and a poisson's ratio of 0.33.
5. The multi-feature biomimetic and multi-material heterogeneous fused honeycomb structure of claim 1, wherein the soft material comprising the hard phase structure is a thermoplastic polyurethane having a density of 1.24g/cm 3 , a young's modulus of 6MPa, and a poisson's ratio of 0.47.
6. The multi-feature biomimetic and multi-material heterogeneous fused honeycomb structure of claim 1, wherein the dual diagonal units are offset disposed cross-connect structures.
7. The multi-feature biomimetic and multi-material heterogeneous fused honeycomb structure of claim 1, wherein the ring units in the soft phase structure form the primary force transfer skeleton of the honeycomb structure.
8. The multi-feature biomimetic and multi-material heterogeneous fused honeycomb structure of claim 1, wherein the dual diagonal units in the hard phase structure are used to inhibit expansion of shear bands under external loading.
9. The multi-feature biomimetic and multi-material heterogeneous fused honeycomb structure of claim 1, wherein the soft phase structure and the hard phase structure are integrally connected by a multi-material integrated additive manufacturing mode.
10. The multi-feature bionic and multi-material heterogeneous fused honeycomb structure according to claim 1, wherein the number of layers of the circular ring units is six to form the soft phase structure, and the double diagonal units are connected with adjacent circular ring units in an offset mode to form the hard phase structure.

Description

Multi-feature bionic and multi-material heterogeneous fused honeycomb structure Technical Field The invention relates to the technical field of materials, in particular to a multi-feature bionic and multi-material heterogeneous fused honeycomb structure. Background In modern industrial and engineering applications, the mechanical properties of the materials are increasingly demanding, in particular in terms of weight reduction, high strength, high toughness and excellent energy absorption capacity. Conventional homogeneous materials, whether metallic, ceramic or polymeric, tend to perform well in one property, but it is difficult to achieve a combination of different performance advantages, for example, high strength materials are often accompanied by increased brittleness, while high toughness materials may sacrifice stiffness or strength. To overcome these limitations, composite materials have been developed that have been combined with materials of different properties in order to achieve an improvement in overall performance. In recent years, microstructure designs, particularly lattice structures and honeycomb structures, have provided new approaches to achieving high performance structural materials. By periodically designing the structural units, macroscopic mechanical properties which are not possessed by the traditional homogeneous material of the material can be endowed. For example, in the fields of aerospace, transportation and the like, honeycomb sandwich structures are widely used due to the characteristics of light weight and high strength. However, the honeycomb or lattice structure of the prior art still has a number of disadvantages. Firstly, the existing honeycomb structure is mostly made of a single material, the mechanical property of the existing honeycomb structure is limited by the property of the material, and multiple requirements on high strength, high energy absorption, low peak force and stable deformation are difficult to meet at the same time. For example, conventional rigid honeycomb structures, while strong, tend to produce high initial peak forces and may experience brittle fracture when subjected to impact loads, resulting in limited energy absorption capacity, while flexible honeycomb structures, while being able to cushion impacts, have insufficient load carrying capacity. Secondly, the existing bionic structure design only imitates single biological characteristics (such as only imitates a hexagonal structure of a honeycomb or only imitates a distribution rule of veins), and multiple bionic structures with complementary characteristics cannot be effectively integrated, so that inherent contradictions of structural materials in aspects of rigidity-toughness, strength-energy absorption and the like are difficult to break through, and the risk of local failure under extreme loads is caused. Therefore, how to deeply fuse various bionic features with different advantages with heterogeneous materials through a fine structural design so as to realize a structural material which is macroscopically light and has comprehensive mechanical properties such as high strength, high energy absorption, low peak force, stable deformation and the like, and the technical problem to be solved in the field is urgent. Disclosure of Invention The invention aims to provide a multi-feature bionic and multi-material heterogeneous fused honeycomb structure so as to solve the problems in the prior art. In order to achieve the above object, the present invention provides the following solutions: the invention provides a multi-feature bionic and multi-material heterogeneous fused honeycomb structure, which comprises: the soft phase structure is formed by arranging a plurality of ring units imitating vegetable sponge fibers in an array manner, wherein the ring units form a multi-layer structure, and the ring units are made of hard materials; The hard phase structure consists of a plurality of double diagonal units imitating deep sea glass sponge, the double diagonal units are in cross connection and distributed among the soft phase structures, and the double diagonal units are made of soft materials; The soft phase structure and the hard phase structure are connected with each other to form a heterogeneous fusion composite honeycomb structure. Preferably, the shape and the size of the ring units are the same, the wall thickness of the ring units is 0.8mm, the radius of the ring units is 3.5mm, and the ring units form a two-dimensional array in a single-row six-layer and total six-layer mode in a two-dimensional plane. Preferably, the two-dimensional array extends in a direction perpendicular to the plane to form a three-dimensional structure having a height of 20 mm. Preferably, the hard material constituting the soft phase structure is a nylon material having a density of 1.01g/cm 3, a Young's modulus of 1200MPa, and a Poisson's ratio of 0.33. Preferably, the soft material constituting the hard phase