CN111941884A - Mechanical fatigue self-repairing structure of thermoplastic material - Google Patents
Mechanical fatigue self-repairing structure of thermoplastic material Download PDFInfo
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- CN111941884A CN111941884A CN202010609516.1A CN202010609516A CN111941884A CN 111941884 A CN111941884 A CN 111941884A CN 202010609516 A CN202010609516 A CN 202010609516A CN 111941884 A CN111941884 A CN 111941884A
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- thermoplastic material
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- mechanical fatigue
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
- B29C73/16—Auto-repairing or self-sealing arrangements or agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
- B29C73/24—Apparatus or accessories not otherwise provided for
- B29C73/30—Apparatus or accessories not otherwise provided for for local pressing or local heating
- B29C73/34—Apparatus or accessories not otherwise provided for for local pressing or local heating for local heating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
Abstract
The invention discloses a mechanical fatigue self-repairing structure of a thermoplastic material, which belongs to the technical field of metal and high polymer materials and comprises a path switching assembly, an energy guide channel and energy conversion nodes, wherein the energy guide channel is arranged in the thermoplastic material, the energy conversion nodes are arranged on the energy guide channel and connected with the energy guide channel, and one end of the path switching assembly is connected with the energy guide channel. According to the invention, the temperature of the material near the self-repairing structure can be higher than the self-generating melting point for a short time through local high-temperature heating, so that the self-generating cracks can be repaired by the molten phase, and the crystal in the thermoplastic material can grow in an originally designed form under the action of natural cooling or external active cooling of the molten phase in a local area, thereby realizing the self-repairing of the thermoplastic material; thermoplastic materials are embedded in a matrix network or a fiber network in a regular mode, and the volume and the shape are controlled to ensure that the performance of the whole workpiece is not influenced, so that the path and the nodes of a heating space are controllable.
Description
Technical Field
The invention relates to the technical field of metal and high polymer materials, in particular to a mechanical fatigue self-repairing structure of a thermoplastic material.
Background
The metal material and the high polymer material are common materials in industry and life, and the metal fatigue refers to a process that the materials and parts gradually generate local permanent accumulated damage at one or more positions under the action of cyclic stress or cyclic strain, and crack or complete fracture suddenly occurs after a certain number of cycles. When a material or structure is subjected to repeated load, the stress value does not exceed the strength limit of the material, and even the stress value is lower than the elastic limit, so that the material or structure can be damaged. Of course, fatigue phenomena are also present for most polymer materials.
With the development of scientific technology, a new technology of metal immunotherapy is appeared, and the fatigue strength of metal is enhanced by a method introduced in advance to resist fatigue damage. However, the existing metal immunotherapy has a general effect, can delay fatigue but cannot prevent the generation of fatigue damage. The above problems are urgently needed to be solved. Therefore, a mechanical fatigue self-repairing structure of thermoplastic material is proposed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to realize the self-repairing function of the mechanical fatigue of the thermoplastic material provides a mechanical fatigue self-repairing structure of the thermoplastic material.
The invention solves the technical problems by the following technical scheme, and comprises a route changing component, an energy guide channel and an energy conversion node, wherein the energy guide channel is arranged inside a thermoplastic material, the energy conversion node is arranged on the energy guide channel and is connected with the energy guide channel, one end of the route changing component is connected with the energy guide channel, and the other end of the route changing component is connected with an external energy source.
Furthermore, the energy-conducting channel is in a plurality, and a plurality of energy-conducting channels are distributed in the thermoplastic material in a matrix network form.
Furthermore, the energy-conducting channel is in a plurality, and a plurality of energy-conducting channels are distributed in the thermoplastic material in the form of fiber network.
Still further, the self-healing structure further comprises an active cooling component disposed on the thermoplastic material.
Still further, the active cooling assembly includes a plurality of capillary channels disposed through the thermoplastic material, and an external positive pressure source of cooling gas is input from the capillary channels.
Furthermore, the energy guide channel is an optical fiber circuit, the energy conversion node is a photo-thermal coupler, and the photo-thermal coupler is arranged on a branch of the optical fiber circuit. In this form, the laser is used to heat the energy conversion node during the repair process.
Furthermore, the energy conduction channel is a wire with an insulating layer, the energy conversion node is a thermocouple, and the thermocouple is arranged on the wire and is electrically connected with the switching component through the wire. In this form, the repair process utilizes current to heat the transduction node.
Furthermore, the energy guide channel is a sound guide pipe with a sound shielding layer, the transduction node is a heat transducer for sound exchange, and the heat transducer for sound exchange is arranged on a branch path of the sound guide pipe. In this form, the ultrasonic waves are used to heat the transduction node during the repair process.
Furthermore, the energy conduction channel is a magnetic conduction pipe with a magnetic insulation layer, the energy conversion node is a magneto-thermal transducer, and the magneto-thermal transducer is arranged on the magnetic conduction pipe. In the form, the magnetic circuit effect is utilized to realize the heating work of the energy conversion node in the repairing process.
Furthermore, the energy guiding channel is a waveguide tube which is subjected to shielding treatment, the energy converting node is a wire energy converter, and the wire energy converter is arranged on the waveguide tube. In this form, the heating operation of the energy conversion node is realized by using radio frequency in the repair process.
Furthermore, the energy guide channel is an air guide tube, the energy conversion node is a pressure heat transducer, and the pressure heat transducer is arranged on the air guide tube. In the form, the heating work of the energy conversion node is realized by utilizing air energy and air pressure in the repairing process.
Furthermore, the thermoplastic material has good wave guiding performance, and the transducer is directly embedded in the thermoplastic material.
Compared with the prior art, the invention has the following advantages: the mechanical fatigue self-repairing structure of the thermoplastic material can enable the temperature of the material near the self-repairing structure to be higher than the autogenous melting point for a short time through local high-temperature heating, further enable the molten phase to repair the autogenous cracks, and enable crystals in the thermoplastic material to grow in an originally designed form under the action of natural cooling or external active cooling of the molten phase in a local area, so that the self-repairing of the thermoplastic material is realized; thermoplastic materials are embedded in a matrix network or a fiber network in a regular mode, and the volume and the shape are controlled to ensure that the performance of the whole workpiece is not influenced, so that the path and the nodes of a heating space are controllable, and the method is worthy of popularization and application.
Drawings
FIG. 1 is a schematic structural diagram of a mechanical fatigue self-repairing structure according to a second embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mechanical fatigue self-repairing structure in the third embodiment of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example one
The embodiment provides a technical scheme: the utility model provides a thermoplastic material's tired selfreparing structure of machinery, includes the subassembly of commuting, leads can passageway, transduction node, it sets up in thermoplastic material's inside to lead can the passageway, transduction node sets up lead can the passageway on and with lead can the access connection, the one end of subassembly of commuting with lead can the access connection, the other end and the external energy source of subassembly of commuting are connected.
The number of the energy conduction channels is multiple, and the energy conduction channels are distributed in the thermoplastic material in a matrix network mode.
The energy guide channels are distributed in the thermoplastic material in a fiber network mode.
The self-healing structure further includes an active cooling assembly disposed on the thermoplastic material.
The active cooling subassembly includes a plurality of capillary pipe ways, and is a plurality of the capillary pipe way runs through the thermoplastic material setting, and outside malleation cold air source by the input of capillary pipe way realizes the regional active rapid cooling to the flash.
The energy guide channel is an optical fiber circuit, the energy conversion node is a photo-thermal coupler, and the photo-thermal coupler is arranged on a branch of the optical fiber circuit. In this form, the laser is used to heat the energy conversion node during the repair process.
The energy conduction channel is a lead with an insulating layer, the energy conversion node is a thermocouple, and the thermocouple is arranged on the lead and is electrically connected with the switching component through the lead. In this form, the repair process utilizes current to heat the transduction node.
The energy conduction channel is a sound conduction pipe with a sound shielding layer, the energy conversion node is a sound exchange heat transducer, and the sound exchange heat transducer is arranged on a branch path of the sound conduction pipe. In this form, the ultrasonic waves are used to heat the transduction node during the repair process.
The energy conduction channel is a magnetic conduction pipe with a magnetic insulation layer, the energy conversion node is a magneto-thermal transducer, and the magneto-thermal transducer is arranged on the magnetic conduction pipe. In the form, the magnetic circuit effect is utilized to realize the heating work of the energy conversion node in the repairing process.
The energy guide channel is a waveguide tube which is subjected to shielding treatment, the energy conversion node is an electric wire energy converter, and the electric wire energy converter is arranged on the waveguide tube. In this form, the heating operation of the energy conversion node is realized by using radio frequency in the repair process.
The energy guide channel is an air guide tube, the energy conversion node is a pressure heat transducer, and the pressure heat transducer is arranged on the air guide tube. In the form, the heating work of the energy conversion node is realized by utilizing air energy and air pressure in the repairing process.
For the thermoplastic material with low loss of electromagnetic wave passing through, various induction type wireless heaters coupled with different electromagnetic heating frequencies can be pre-embedded in the thermoplastic material, multiple surfaces of a thermoplastic material workpiece are subjected to electromagnetic shielding treatment, one surface is left to irradiate the current area by using a multiband high-power electromagnetic wave emitting device, the temperature of the heater is higher than the melting point of the nearby material to realize short-time flash melting, and then other coupling frequencies are changed to heat different areas.
Example two
As shown in fig. 1, the present embodiment provides a technical solution: a mechanical fatigue self-repairing structure made of thermoplastic materials comprises a high-melting-point lead 21 with an insulating layer, a high-melting-point thermocouple wire 22 and a current distributor 23, wherein the high-melting-point lead 21 is an energy conducting channel, the high-melting-point thermocouple wire 22 is an energy converting node, and the current distributor 23 is a switching assembly.
In the present embodiment, the high melting point wires 21 are multiple and form multiple rectangular structures, the high melting point wires 21 of the multiple rectangular structures form a matrix network and are distributed inside the workpiece 1, two ends of each high melting point wire 21 are led out from the electrode lead-out surface 3 led out from the surface of the workpiece 1 and are correspondingly connected with respective output ends of the current distributor 23, and the input end of the current distributor 23 is connected with an external power supply.
In the present embodiment, the workpiece 1 is a metal piece or other thermoplastic material.
In the present embodiment, a plurality of high melting point thermocouple wires 22 are connected in series to the high melting point lead wire 21, so that the meltable regions of the high melting point thermocouple wires 22 overlap each other when heated, and the design embedding amount and volume of the high melting point lead wire 21 and the high melting point thermocouple wires 22 should be ensured not to affect the design performance of the workpiece 1.
In this embodiment, a plurality of capillary channels are disposed through the inside of the workpiece 1, and are used for performing a fast and efficient active cooling operation 4 on the heating region after the local heating. The manner and amount of capillary resistance is required to ensure that it does not affect the mechanical properties of the workpiece 1.
The working principle of the embodiment is as follows: when repair is needed, the high-melting-point thermocouple wires 22 in different areas in the workpiece 1 are controlled by an external switch to heat the workpiece, the temperature of materials near the high-melting-point thermocouple wires 22 is higher than the melting point of the materials in a short time through local high-temperature heating, further, the molten phase can repair self-generated cracks, crystals of the molten phase in the local area can grow in a designed form under the cooling effect of a nearby capillary pipeline 4, the range of local molten-state substances is controlled in an area without influences on the material form and working parameters, flash melting work of other areas is started after the molten area is completely cooled to the working temperature, the high-melting-point thermocouple wires 22 and the high-melting-point thermocouple wires 22 are embedded in the workpiece 1 in a matrix network mode, and the volume and the form are controlled to ensure that the performance of the whole workpiece is not influenced, so that the heating space path and the nodes are controllable. It should be noted that the single heating zone should not exceed 30 seconds of heating time while the molten phase zone should not be greater than 5cm3。
EXAMPLE III
As shown in fig. 2, the present embodiment provides a technical solution: a mechanical fatigue self-repairing structure made of thermoplastic materials comprises a high-melting-point lead 21 with an insulating layer, a high-melting-point thermocouple wire 22 and a current distributor 23, wherein the high-melting-point lead 21 is an energy conducting channel, the high-melting-point thermocouple wire 22 is an energy converting node, and the current distributor 23 is a switching assembly.
In the present embodiment, the high melting point wires 21 are multiple and form multiple rectangular structures, the high melting point wires 21 of the multiple rectangular structures form a parallel fiber network, the fiber network is distributed inside the workpiece 1, two ends of each high melting point wire 21 are led out from the electrode lead-out surface 3 led out from the surface of the workpiece 1 and are correspondingly connected with respective output ends of the current distributor 23, and the input end of the current distributor 23 is connected with an external power supply.
In the present embodiment, the workpiece 1 is a metal piece or other thermoplastic material.
In the present embodiment, a plurality of high melting point thermocouple wires 22 are connected in series to the high melting point lead wire 21, so that the meltable regions of the high melting point thermocouple wires 22 overlap each other when heated, and the design embedding amount and volume of the high melting point lead wire 21 and the high melting point thermocouple wires 22 should be ensured not to affect the design performance of the workpiece 1.
In this embodiment, a plurality of capillary channels are disposed through the inside of the workpiece 1, and are used for performing a fast and efficient active cooling operation 4 on the heating region after the local heating. The manner and amount of capillary resistance is required to ensure that it does not affect the mechanical properties of the workpiece 1.
The working principle of the embodiment is as follows: when repairing is needed, the high melting point thermocouple wires 22 in different areas in the workpiece 1 are controlled by an external switch to heat the workpiece, the temperature of the material near the high melting point thermocouple wire 22 is made higher than its own melting point for a short time by local high temperature heating, and then the molten phase repairs the self-generated cracks, crystals in the workpiece 1 can grow in a designed form under the cooling action of the nearby capillary pipeline 4, the local molten state substance range is controlled in a region without influence on the material form and working parameters, the flash melting work of other regions is started after the molten region is completely cooled to the working temperature, the high-melting-point thermocouple wire 22 and the high-melting-point thermocouple wire 22 are embedded into the workpiece 1 in a parallel fiber network mode, and the volume and the form are controlled to ensure that the overall workpiece performance is not influenced, so that the heating space path and the nodes are controllable. It should be noted that the single heating zone should not exceed 30 seconds of heating time while the molten phase zone should not be greater than 5cm3。
In summary, in the mechanical fatigue self-repairing structure of the thermoplastic material of the above embodiment, the temperature of the material near the self-repairing structure can be higher than the self-generated melting point for a short time by local high temperature heating, so that the molten phase can repair the self-generated crack, and the crystal in the thermoplastic material can grow in the originally designed form under the action of natural cooling or external active cooling of the molten phase in the local region, thereby realizing self-repairing of the thermoplastic material; thermoplastic materials are embedded in a matrix network or a fiber network in a regular mode, and the volume and the shape are controlled to ensure that the performance of the whole workpiece is not influenced, so that the path and the nodes of a heating space are controllable, and the method is worthy of popularization and application.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A mechanical fatigue self-healing structure of thermoplastic material, characterized in that: including the subassembly of commuting, lead ability passageway, transduction node, it sets up in thermoplastic material's inside to lead the ability passageway, the transduction node sets up lead on the ability passageway and with lead can the access connection, the one end of subassembly of commuting with lead can the access connection, the other end and the external energy source of subassembly of commuting are connected.
2. A thermoplastic material mechanical fatigue self-healing structure according to claim 1, characterized in that: the number of the energy guide channels is multiple, and the energy guide channels are distributed in the thermoplastic material in a matrix network form or a fiber network form.
3. A thermoplastic material mechanical fatigue self-healing structure according to claim 1, characterized in that: the self-healing structure further includes an active cooling assembly disposed on the thermoplastic material.
4. A thermoplastic material mechanical fatigue self-healing structure according to claim 1, characterized in that: the active cooling assembly comprises a plurality of capillary pipelines, the capillary pipelines penetrate through the thermoplastic material, and an external positive pressure cold air source is input through the capillary pipelines.
5. A thermoplastic material mechanical fatigue self-healing structure according to claim 1, characterized in that: the energy guide channel is an optical fiber circuit, the energy conversion node is a photo-thermal coupler, and the photo-thermal coupler is arranged on the optical fiber circuit.
6. A thermoplastic material mechanical fatigue self-healing structure according to claim 1, characterized in that: the energy conduction channel is a wire, the energy conversion node is a thermocouple, and the thermocouple is arranged on the wire and is electrically connected with the switching component through the wire.
7. A thermoplastic material mechanical fatigue self-healing structure according to claim 1, characterized in that: the energy conduction channel is a sound conduction pipe, the energy conversion node is a sound exchange heat transducer, and the sound exchange heat transducer is arranged on the sound conduction pipe.
8. A thermoplastic material mechanical fatigue self-healing structure according to claim 1, characterized in that: the energy conduction channel is a magnetic conduction pipe, the energy conversion node is a magneto-thermal transducer, and the magneto-thermal transducer is arranged on the magnetic conduction pipe.
9. A thermoplastic material mechanical fatigue self-healing structure according to claim 1, characterized in that: the energy guide channel is a waveguide tube, the energy conversion node is an electric wire energy converter, and the electric wire energy converter is arranged on the waveguide tube.
10. A thermoplastic material mechanical fatigue self-healing structure according to claim 1, characterized in that: the energy guide channel is an air guide tube, the energy conversion node is a pressure heat transducer, and the pressure heat transducer is arranged on the air guide tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010609516.1A CN111941884A (en) | 2020-06-29 | 2020-06-29 | Mechanical fatigue self-repairing structure of thermoplastic material |
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| CN202010609516.1A CN111941884A (en) | 2020-06-29 | 2020-06-29 | Mechanical fatigue self-repairing structure of thermoplastic material |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030220432A1 (en) * | 2002-04-15 | 2003-11-27 | James Miller | Thermoplastic thermally-conductive interface articles |
| CN103358543A (en) * | 2013-07-25 | 2013-10-23 | 东北林业大学 | Ultrasonic welding method for wood-plastic composite |
| CN104275811A (en) * | 2013-07-01 | 2015-01-14 | 通用汽车环球科技运作有限责任公司 | Thermoplastic component repair |
| CN108407340A (en) * | 2018-03-26 | 2018-08-17 | 南京航空航天大学 | Apparatus for coating and restorative procedure are quickly reviewed one's lessons by oneself in a kind of composite element outfield |
| CN109353037A (en) * | 2018-11-26 | 2019-02-19 | 华南理工大学 | A kind of thermoplastic auto parts and components rapid-maintenance apparatus and method |
| WO2020038584A1 (en) * | 2018-08-23 | 2020-02-27 | Rhodia Operations | Composites with flow enhancing structures and process for their manufacture |
-
2020
- 2020-06-29 CN CN202010609516.1A patent/CN111941884A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030220432A1 (en) * | 2002-04-15 | 2003-11-27 | James Miller | Thermoplastic thermally-conductive interface articles |
| CN104275811A (en) * | 2013-07-01 | 2015-01-14 | 通用汽车环球科技运作有限责任公司 | Thermoplastic component repair |
| CN103358543A (en) * | 2013-07-25 | 2013-10-23 | 东北林业大学 | Ultrasonic welding method for wood-plastic composite |
| CN108407340A (en) * | 2018-03-26 | 2018-08-17 | 南京航空航天大学 | Apparatus for coating and restorative procedure are quickly reviewed one's lessons by oneself in a kind of composite element outfield |
| WO2020038584A1 (en) * | 2018-08-23 | 2020-02-27 | Rhodia Operations | Composites with flow enhancing structures and process for their manufacture |
| CN109353037A (en) * | 2018-11-26 | 2019-02-19 | 华南理工大学 | A kind of thermoplastic auto parts and components rapid-maintenance apparatus and method |
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Application publication date: 20201117 |