Abstract:
본 발명은 경량 다공질 재료와 그 제조 방법에 관한 것으로, 한 평면상에서 굴곡된 다수의 와이어를 사용하여 그물 형태의 평면으로 직조하고, 상기 직조된 그물 형태의 평면을 상하로 평행하게 다수로 배열한 다음, 상기 상하로 배열된 그물 형태의 평면 내(면내)에 면외 방향에서 다수의 직선 와이어를 삽입하되, 하나의 직선 와이어가 한 평면당 하나의 교차점과 교차되도록 각각 삽입하여 고정함으로써, 카고메 트러스와 유사한 형태의 구조 또는 복수의 정8면체와 12면체(cuboctahedron 또는 vector equilibrium)로 이루어진 다층 트러스와 유사한 형태의 구조로 형성한다. 이러한 구조를 갖는 본 발명은 트러스 구조체의 압축 및 전단하중의 강도를 크게 높일 수 있을 뿐만 아니라 제조공정이 단순하여 대량생산에 유리한 장점이 있다.
Abstract:
PURPOSE: A truss type periodic cellular material and a method of manufacturing the same are provided to improve energy absorption force due to structural stability and deformation. CONSTITUTION: A method of manufacturing truss type periodic cellular material comprises the following steps of: weaving or cross-placing a wire(21) and forming a two-dimensional plane of a net shape with plural holes; placing polyhedron or sphere filler(31) on a part of plural holes formed on the two-dimensional plane; laminating the two-dimensional plane with layers; forming a 3D truss structure(11) by weaving the two dimensional plane with wire; and welding the polyhedron or the sphere filler and the wire respectively or to each other.
Abstract:
Multi-layered three dimensional porous structures and a method of manufacturing the structure are provided to make light, stiff and strong materials due to empty space formed by arranging cells with a pattern. The empty space is possible to be filled with another material or used as a passageway for liquids. In addition, properties on heat transfer, vibration isolation and electric conductivity can be changed by varying porosity of the material. In a three dimensional space, continuous patterns have hexagonal holes regularly in six directions inclined 60° and 120° and inside of the patterns are composed of a group of tetrahedral solids and a group of octahedron cells. A structure having cells similar to Kagome truss is obtained by processing hexagonal holes from 3 or 6 directions inclined 60° and 120° with utilizing HAR(High Aspect Ratio) MEMS(Micro-Electro-Mechanical System) machining process and a machining process capable of making holes with high depth-to-width ratio.
Abstract:
The present invention relates to a lightweight cellular material and a preparation method thereof, wherein a networked plane is woven by using a plurality of wires bent in one plane, a plurality of the woven networked planes are arranged in parallel up and down, and a plurality of straight wires are inserted in the networked planes arranged up and down from the direction outside the plane, and each straight wire is inserted to be fixed in such a way that one straight wire crosses with one crossing per plane, thereby forming a Kagome truss-like structure or a multilayer truss-like structure comprising a plurality of regular octahedrons and dodecahedrons (cuboctahedron or vector equilibrium). The structure of the present invention can remarkably increase the compressive strength and the strength of shearing force of a truss structure and is advantageous for mass production due to a simple manufacturing process.
Abstract:
PURPOSE: Periodic cellular materials of truss type composed of woven wires and straight wires and a manufacturing method thereof are provided to improve the strength of a truss structure, since a straight truss element suppresses buckling. CONSTITUTION: Periodic cellular materials of truss type composed of woven wires and straight wires comprise multiple wires curved on one plane and multiple straight wires. The multiple bent wires are woven on a plane of a mesh shape. The woven planes of a mesh shape are placed vertically in parallel. The straight wires are inserted into the plane of a mesh shape from the outside of the plane. The straight wire is inserted and fixed, so one straight wire crosses one intersecting point per one plane.
Abstract:
A lightweight sandwich panel having a core composed of wires and a manufacturing method thereof are provided to improve the rigidity by excluding interference with wires, to enhance the mechanical performance by adjusting the bending angle, arrangement and intervals, and to cut down manufacturing costs by bending wires simply. A sandwich panel is composed of upper and lower face sheets and a truss core. A wire(1) is placed in the upper and lower face sheets, arranged in parallel with an x-z plane, and formed of triangular wave in projecting a plane arranged vertically to a z-axis. The wire is arranged in the sandwich panel and formed of triangular wave having sides arranged alternately in projecting on a plane arranged vertically to a y-axis. The wires are arranged in parallel and placed at regular intervals on the x-z plane. The wires are arranged alternately or twisted repeatedly, and inclined between the parallel wires.
Abstract:
본 발명은 3차원 격자 트러스 구조체와 그 제조 방법에 관한 것으로, 연속된 와이어군으로 구성되는 3차원 격자 트러스 구조체에 있어서, 공간상에서 서로 90도의 방위각을 가지고 교차되어 그물 구조의 2차원 트러스 망을 이루며 다단 배열되는 다수의 나선형 와이어군 및 상기 다수의 와이어군의 교차점과 인접하는 교차점 사이의 반 피치 지점에 상기 2차원 트러스 망과 수직한 방향으로 교차되는 별도의 나선형 와이어군을 포함하여, 모든 교차점에서 서로 직각인 두 방향의 나선형 와이어군이 교차하도록 구성된 것을 특징으로 하는 3차원 격자 트러스 구조체와 이러한 3차원 격자 트러스 구조체의 제조 방법을 포함하여, 각 와이어의 굴곡과 와이어 사이의 간섭을 최소화함으로써 무게 대비 강도와 강성이 높고 표면적이 큰 새로운 형태의 3차원 격자 트러스 구조체와 이를 저비용/대량으로 제조할 수 있는 방법을 제공한다.
Abstract:
PURPOSE: A three-dimension lattice truss structure and a method for manufacturing thereof are provided to improve aerodynamic property and mechanical property by controlling the density of a wire in a fixed space. CONSTITUTION: A three-dimension lattice truss structure comprises multiple wire groups and a separate wire group. Multiple wire groups is connected with each other and arrayed to be a two dimension truss net. The separate wire group exists on the middle point of the connection point which connects multiple wires. The separate wire group is connected to two dimension truss net in a perpendicular direction. The multiple wire groups and the separate wire group have different pitches and diameters.