Component and joint integrated composite material pre-tightening force longitudinal fractal tooth connecting device

A composite material and connecting device technology, which can be applied to slender elements, building elements, etc., can solve the problems of opening holes or teeth, unable to fully exert the bearing capacity of the composite material pipe, increasing the weight of the composite material pipe, etc. The friction surface area, improving the bearing capacity of the joint, and avoiding the effect of secondary processing

Pending Publication Date: 2022-05-10
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These connection technologies all have certain deficiencies: for composite material bolt connection, rubber-screw hybrid connection and pre-tightening force tooth connection, secondary processing such as opening or toothing of the composite material is required at the joint.
[0005] At the same time, the existing composite material pipes

Method used

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  • Component and joint integrated composite material pre-tightening force longitudinal fractal tooth connecting device
  • Component and joint integrated composite material pre-tightening force longitudinal fractal tooth connecting device
  • Component and joint integrated composite material pre-tightening force longitudinal fractal tooth connecting device

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0037] Example 1

[0038] Inner and outer metal sleeves, pultruded composite tubes. The wall thickness of the composite tube is 8mm, and the thickness of the inner and outer metal sleeves is 6mm. Three-stage teeth evenly distributed along the circumference were prepared on the inner wall of the outer metal sleeve, and the depth and thickness of the teeth were 1.5 mm, 1 mm and 0.5 mm respectively. In order to match the local compressive bearing capacity of the joint with the bearing capacity of the connection, the number of longitudinal teeth prepared on the outer metal sleeve in the circumferential direction is 16, and the teeth are evenly distributed along the circumferential direction. Three-stage teeth evenly distributed along the circumference are prepared on the outer wall of the inner metal sleeve, and the geometric dimensions of the teeth are the same as those of the outer metal sleeve. When the composite material tube is pultruded, the longitudinal parting teeth matc...

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PUM

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Abstract

The invention relates to a component and joint integrated composite material pretightening force longitudinal fractal tooth connecting device. Comprising an outer metal sleeve, a composite pipe and an inner metal sleeve. The inner surface and the outer surface of the composite material pipe are each provided with a plurality of longitudinal fractal teeth integrally formed with the composite material pipe, the longitudinal fractal teeth are parallel to the axis of the composite material pipe, and the multiple fractal teeth are evenly arranged in the circumferential direction of the composite material pipe. Fractal teeth matched with the fractal teeth on the outer surface of the composite material pipe are arranged on the inner surface of the outer metal sleeve, and fractal teeth matched with the fractal teeth on the inner surface of the composite material pipe are arranged on the outer surface of the inner metal sleeve. And the external metal sleeve generates plastic deformation by applying force, so that the whole joint generates pre-tightening force, and connection is realized. Connection of the composite pipes is achieved through the integrally-formed longitudinal fractal teeth, and the strength of the composite pipes is improved through the longitudinal fractal teeth.

Description

technical field [0001] The invention belongs to the field of composite material connection, and in particular relates to a method for improving the bearing capacity of the existing composite material connection technology and further reducing the weight of the composite material connection and components. Background technique [0002] Composite material connection technologies mainly include: bolt connection, glue connection, glue-screw hybrid connection and composite material pre-tightening tooth connection. These connection technologies all have certain deficiencies: for composite bolt connections, rubber-screw hybrid connections, and pre-tightening force tooth connections, secondary processing such as opening holes or tooth openings on the composite materials is required at the joints. This will not only increase the preparation cost of the joint but also interrupt the continuity of the fiber, thereby reducing the bearing capacity of the composite joint. Although there i...

Claims

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Application Information

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IPC IPC(8): F16S3/00F16S3/06B29C65/64B29C65/00
CPCF16S3/00F16S3/06B29C65/64B29C66/5221B29C66/52272
Inventor 赵启林李飞曲全亮周黎军施霖高训鹏
Owner NANJING UNIV OF TECH
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