Preparation method of interplantation shape memory alloy wire layering composite and shaping mould

A technology of memory alloy wire and composite material, applied in the field of fiber reinforced composite material sheet, can solve the problems of bulky device structure, SMA strain variation, limited structure types, etc., and achieve the effect of shortening the processing process and improving the implantation accuracy

Inactive Publication Date: 2010-06-23
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: ①When the number of shape memory alloy wires embedded is large, the structure of the device is unavoidably cumbersome, there are too many manual operations during the processing, and deformation is easy to occur during the movement of the fixture, which is likely to cause changes in the SMA strain. , resulting in a large operational error; ② When preparing a laminated composite material, only a fixed single-layer SMA wire can be implanted into the same layer of the composite ma

Method used

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  • Preparation method of interplantation shape memory alloy wire layering composite and shaping mould
  • Preparation method of interplantation shape memory alloy wire layering composite and shaping mould
  • Preparation method of interplantation shape memory alloy wire layering composite and shaping mould

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Use glass fiber / epoxy unidirectional tape to prepare a laminated composite material plate with 12 layers of parallel layup, the designed molded thickness is 1.2mm, and the diameter of the multiple shape memory alloy wires used is 0.2mm, and the thickness is 5 % elongation, implanted in parallel to a depth of about 0.4mm from the surface of the plate. During preparation, lay 8 layers of unidirectional tape according to the pre-design, then arrange the shape memory alloy wires, select the thickness of the spacer on the steel frame assembly to be 0.8mm, continue laying the remaining 4 layers, and clamp the steel frame on the left For the chuck, apply a pre-tension of 0.5N to each shape memory alloy wire from the right, and clamp the right chuck; set the stepper motor stroke to 5% of the length of the composite material, and start heating after the pre-stretching is stable Pressurized equipment, compression molding. Through observation, the position and state of the shape ...

Embodiment 2

[0033] Prepare a 6-layer glass fiber plain weave / epoxy composite material plate with a thickness of 2.4mm. The diameter of the multiple shape memory alloy wires used is 0.2mm, and the elongation rate is 5%, and they are implanted in parallel at about 0.4mm from the surface of the plate depth. During preparation, first lay 4 layers of glass fiber plain cloth on the lower mold and then plant shape memory alloy wires. The method is the same as in Example 1. After all the glass fiber cloths are laid, pour the prepared epoxy resin glue, adjust Temperature and pressure, compression molding. Micrographs show that the shape memory alloy wire can still maintain a straight and parallel state, and its implantation position basically meets the design requirements.

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Abstract

The invention relates to a preparation method of interplantation shape memory alloy wire layering composite and a composite shaping mould for realizing the method. The method uses a specially designed mould and implants a group or several groups of shape memory alloy wires which are distributed in parallel in the single target layer or a plurality of target layers during layering of fiber reinforcement or the prepreg thereof, so that the method is suitable for mould pressing or resin vacuum auxiliary shaping. The shape memory alloy wire interplanted with the method can overcome the influence of mould pressing and resin flowing and is stably distributed at the preset position of composite thickness at designed pre-elongation amount to form composite with reliable and accurate vibration performance; the shaping mould is a set of combined metal matched moulds and comprises a set of steel frame assemblies, a metal surface plate patrix, a counterdie with a groove and a counterdie cover plate, wherein the steel frame assemblies can clamp the shape memory alloy wire and can control the elongation amount and the horizontal height thereof.

Description

technical field [0001] The invention relates to a controllable vibration fiber-reinforced composite material plate with internal shape memory alloy wire, and in particular to a forming method and a forming mold for the plate. Background technique [0002] Vibration control is a research direction of the adaptive performance of composite materials. Its main purpose is to reduce vibration amplitude, enhance damping and control mode shape, so as to eliminate and control structural vibration and noise. [0003] In composite structural products, vibration control has extremely important practical significance. For example, adding damping materials to large warehouses and missile launching devices can improve the working accuracy of the system; adding damping materials to car bodies, seats, and motor covers can help eliminate noise during work, especially in the body. Vibration active control technology can increase the comfort of drivers and passengers; while in some sports such...

Claims

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Application Information

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IPC IPC(8): B29C70/54B29C70/56B29C70/30
Inventor 王瑞徐磊马崇启张淑洁杨秋红
Owner TIANJIN POLYTECHNIC UNIV
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