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Dot matrix sandwich structure of wooden engineering composite material

A technology of engineering composite materials and sandwich structures, applied in the field of building materials, can solve problems such as low strength and stiffness, competition of building materials, high prices, etc., and achieve the effect of improving strength, broad market prospects, and high specific strength

Inactive Publication Date: 2014-06-25
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Glulam, I-beams and laminated veneer lumber are wood engineering materials that have been widely used, and they are also typical products of "good use of inferior materials". Although these traditional wood engineering materials can overcome some inherent problems of wood to a certain extent, Disadvantages: broaden the application field of wood and make efficient use of wood resources. However, its relatively low strength and rigidity, large self-weight, and high price still limit their application to a certain extent. Cannot compete with other building materials in some occasions requiring light weight and high strength

Method used

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  • Dot matrix sandwich structure of wooden engineering composite material
  • Dot matrix sandwich structure of wooden engineering composite material
  • Dot matrix sandwich structure of wooden engineering composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a wood engineering composite material straight-column lattice sandwich structure, which includes a first panel, a core layer, and a second panel.

[0036] The core layer includes a straight-column lattice structure and a filler filled with a straight-column lattice structure, and is partially reinforced with a fiber-reinforced material and bonded with an adhesive.

[0037] The straight-column lattice structure is periodically distributed in the core layer according to its unit specification design. Such as figure 2 As shown, the specification design of the straight column unit is: length l=32*n mm, width b=32*n mm, height (h) is 3 to 10 times the thickness of the panel, n=1 to 10. According to the unit specifications of the straight column type, mortise on the panel 1 and panel 2. The diameter of the mortise is 6-50mm, and the depth of the mortise is 1 / 3-2 / 3 times the thickness of the panel. Stick the lattice column with cloth. Insert pane...

Embodiment 2

[0040] Such as image 3 As shown, the difference between this embodiment and Embodiment 1 is that its lattice structure is oblique column type, such as Figure 4 As shown, the lattice column and the panel form an angle w, w=20°~70°, and the specification design of the oblique column type unit: the height h is 3 to 10 times the panel thickness, and the length l=2*h / sin w+10mm , Width b=32*n mm, n=1~10. There are two ways of mortise joint, one is that half of the mortise is uniform in depth, and the other half is drilled through the panels, and the shorter dot matrix columns are dipped in cloth adhesive and inserted into the corresponding mortise grooves on panels 1 and 2. The longer dot matrix columns are inserted into the corresponding tenon grooves on panels 1 and 2, and the diameter of the dot matrix columns is slightly larger than the tenon grooves; the other is that the tenoning depth is all uniform, and the dot matrix columns coated with adhesive and the panels are 1. P...

Embodiment 3

[0043] Such as Figure 7 As shown, the difference between the present embodiment and the second embodiment is that the lattice structure is tetrahedral, and the lattice columns and the second panel form an angle w, w=20°-70°. Such as Figure 8As shown, the specification design of the tetrahedral unit: the height h is 3 to 10 times the panel thickness, the length l=hcos30° / sin w+10mm, and the width b=h / sin w+10mm. The filler of the core layer is carbon black. The tetrahedral lattice sandwich structure further improves the shear performance compared with the inclined column lattice sandwich structure, and the filler-carbon black adds electromagnetic shielding function to it, which can be used in special structures that require electromagnetic shielding function.

[0044] The lattice column is made of glass fiber rods; panels 1 and 2 are made of solid wood sawn timber; the fiber reinforced material is made of carbon fiber mesh cloth; the adhesive is made of phenolic resin.

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Abstract

The invention discloses a dot matrix sandwich structure of a wooden engineering composite material. The dot matrix sandwich structure comprises a panel I (1), a core layer (2) and a panel II (3), wherein the panel I (1), the core layer (2) and the panel II (3) are formed by gluing through joggle joint; the core layer (2) comprises a dot matrix structures (4) and fillers filling the dot matrix structures (4); partial enhancement is performed through gluing of an adhesive by using a fiber reinforced material; the dot matrix structures (4) are periodically distributed on the core layer according to reasonable unit specification design. The dot matrix sandwich structure can bear high static load and cyclic load for a long time, is light in weight, high in specific strength and high in specific stiffness, endows the wooden engineering composite material with multifunctional characteristic and can be widely applied to the fields of constructional engineering, vehicle engineering, bridge engineering and the like requiring structure load and multifunction.

Description

technical field [0001] The invention relates to building materials, in particular to a lattice sandwich structure of wood engineering composite materials. Background technique [0002] The present invention takes the design of composite materials as the theoretical basis, proceeds from the idea of ​​integrated design of structure and function, applies the lattice structure to the structural design of wood engineering composite materials, and prepares high-performance wood engineering composite materials, which not only can be used for a long time It bears a large static load and cyclic load, and endows wood engineering composite materials with multi-functional characteristics, which can be widely used in construction engineering, car body engineering, bridge engineering and other fields that require both structural bearing and multi-functional requirements. [0003] Glulam, I-beams and laminated veneer lumber are wood engineering materials that have been widely used, and the...

Claims

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Application Information

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IPC IPC(8): B32B3/22
Inventor 金明敏胡英成
Owner NORTHEAST FORESTRY UNIVERSITY
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