CN112903426A

CN112903426A - Low-speed impact carbon fiber composite beam clamp

Info

Publication number: CN112903426A
Application number: CN202110388421.6A
Authority: CN
Inventors: 彭艳来; 吴震宇; 李重; 李瑛�; 高雪芬; 马晓艳
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-06-04

Abstract

The invention discloses a clamp for a low-speed impact carbon fiber composite beam, which comprises a clamp base, carbon fiber plate fixing grooves arranged in the clamp base, clamp kits arranged on the left side and the right side of the clamp base and clamp kits arranged on the clamp base.

Description

Low-speed impact carbon fiber composite beam clamp

Technical Field

The invention relates to the field of carbon fiber composite tools, in particular to a low-speed impact carbon fiber composite beam clamp.

Background

Compared with the traditional metal material, the carbon fiber composite material has high specific strength, high specific rigidity, strong designability and good fatigue resistance, and is widely applied to the fields of aerospace, building, transportation and the like. The carbon fiber composite material is often damaged by various foreign objects. In low-energy impact, such as dropping of maintenance tools, hail, broken stones on runways during take-off or landing, screws, tire fragments, bird collisions and the like, the depth of surface pits formed by the impact is usually less than 0.5mm, and the surface pits are difficult to find visually, but in-layer damage and delamination damage such as fiber compression, fiber fracture, matrix compression, matrix cracking and the like occur in the carbon fiber composite material, and the mechanical property is remarkably reduced.

A drop hammer device is adopted in the low-energy impact test of most carbon fiber composite materials. In order to avoid errors of the beam sample in the impact test process due to unstable clamps, the clamps are designed according to the size of the beam sample. The fixed groove in the clamp base is used for placing the beam sample at a proper position so as not to deviate from an impact position in the test process. In addition, the corner of the fixed groove close to the lower part of the hollow part is set to be a round angle so as to prevent the beam sample from being damaged during impact and generate analysis misjudgment. A set is respectively placed on the left side and the right side of the clamp to fix the beam sample, and the span is determined by the set clamping piece.

Disclosure of Invention

In order to solve the technical problems, the invention provides a low-speed impact carbon fiber composite beam clamp, which alleviates the error caused by unstable clamp and can be used for fixing a special device of a carbon fiber beam so as to reduce the error of the carbon fiber beam caused by the discomfort of the clamp.

In order to achieve the technical purpose, the technical scheme of the invention is as follows:

a low-speed impact carbon fiber composite beam clamp, comprising: the device comprises a clamp base, a clamp external member, clamp pieces of the clamp external member, a beam sample and a clamp external member fixing device 7; the clamp base is arranged at the bottommost end, and the clamp suites are arranged at two ends of the clamp base, wherein the clamp base penetrates through the clamp suites; the clamp base is fixedly connected with the clamp external member clamping piece, wherein the clamp external member clamping piece is used for limiting the clamp external member; the fixture comprises a fixture base and is characterized in that a fixing groove is formed in the upper end of the fixture base, a beam sample is fixedly installed in the fixing groove, and a fixture kit fixing device 7 is arranged at the upper end of the fixture base.

Preferably, the fixing groove is formed using carbon fiber.

Further, a fixing groove fillet is arranged in the fixing groove, and two fixing grooves are arranged.

Further, the number of the round corners of the fixing grooves is 8.

Preferably, the number of the clamp sets is two, and the two clamp sets are respectively located on two sides of the clamp base.

Preferably, the number of the clamp pieces of the clamp kit is four.

Compared with the prior art, the invention has the following beneficial effects:

the invention has simple structure and easy operation, and can fix the special device of the carbon fiber beam so as to reduce the error of the carbon fiber beam caused by the discomfort of the clamp.

The corner of the fixing groove close to the lower part of the hollow part is provided with a round angle so as to prevent the beam sample from being damaged during impact and generate analysis misjudgment

Drawings

FIG. 1 is a schematic structural view of a low-speed impact carbon fiber composite beam clamp according to the present invention;

FIG. 2 is a schematic structural view of a clamp kit of a low-speed impact carbon fiber composite beam clamp according to the present invention;

FIG. 3 is a perspective view of a low-speed impact carbon fiber composite beam clamp according to the present invention;

description of the drawings: 1. the fixture comprises a fixture base, 2, a fixing groove, 3, a fixture kit, 4, a fixture kit clamping piece, 5, a beam sample, 6, a fixing groove fillet, 7 and a fixture kit fixing device.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, characteristic details such as specific configurations and components are provided only to help the embodiments of the present invention be fully understood. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

With reference to fig. 1-3, the present invention provides a low-speed impact carbon fiber composite beam clamp, comprising: the device comprises a clamp base 1, a clamp external member 3, a clamp external member clamping piece 4, a beam sample 5 and a clamp external member fixing device 7; the clamp base 1 is arranged at the bottommost end, the clamp external members 3 are arranged at two ends of the clamp base 1, and the clamp base 1 penetrates through the clamp external members 3; the clamp base 1 is fixedly connected with a clamp external member clamping piece 4, wherein the clamp external member clamping piece 4 is used for limiting the clamp external member 3; the upper end of the clamp base 1 is provided with a fixing groove 2, the beam sample 5 is fixedly installed in the fixing groove 2, and the clamp suite fixing device 7 is arranged at the upper end of the clamp base 1.

Further, the beam sample 5 is a carbon fiber beam

Preferably, fixed slot 2 adopts carbon fiber to form, is equipped with fixed slot fillet 2 in the fixed slot 2, and fixed slot 2 is equipped with two, and roof beam sample 5 can be placed in fixed slot 2, and the setting up of fixed slot fillet can further reduce the damage of carbon fiber roof beam receiving non-impact force.

Preferably, the two clamp kits 3 are respectively arranged at two sides of the clamp base 1, and the two clamp kits 3 are arranged to effectively fix the carbon fiber beam in the fixing groove 2.

Preferably, four clamp external members 4 are provided, four clamp external member fixing devices 7 are provided, and the clamp external members 4 and the clamp external member fixing devices 7 are used for fixing the clamp external member 3.

The working principle of the invention is as follows: when the device is applied to a carbon fiber beam sample impacted at a low speed, the carbon fiber beam sample is cut into a required size, then the sample is placed in the fixed groove 2 on the clamp base 1, the sleeve part clamping piece 3 is provided with a span, the left side and the right side of the clamp are respectively sleeved with the clamp sleeve part 4, and the carbon fiber beam sample is fixed at a required position.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the invention has been described in detail with reference to the foregoing illustrative embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a low-speed carbon-fibre composite roof beam anchor clamps that strike which characterized in that includes: the device comprises a clamp base (1), a clamp external member (3), a clamp external member clamping piece (4), a beam sample (5) and a clamp external member fixing device (7); the clamp base (1) is arranged at the bottommost end, the clamp suite (3) is arranged at two ends of the clamp base (1), and the clamp base (1) penetrates through the clamp suite (3); the clamp base (1) is fixedly connected with the clamp external member clamping piece (4), wherein the clamp external member clamping piece (4) is used for limiting the clamp external member (3); the fixture comprises a fixture base (1), and is characterized in that a fixing groove (2) is formed in the upper end of the fixture base (1), a beam sample (5) is fixedly installed in the fixing groove (2), and a fixture kit fixing device (7) is arranged at the upper end of the fixture base (1).

2. The low-speed impact carbon fiber composite beam clamp as claimed in claim 1, wherein the fixing groove (2) is formed of carbon fiber.

3. The low-speed impact carbon fiber composite beam clamp as claimed in claim 2, wherein a fixing groove round corner (2) is arranged in the fixing groove (2), and two fixing grooves (2) are arranged.

4. The low-speed impact carbon fiber composite beam clamp as claimed in claim 3, wherein the number of the seating groove fillets (2) is 8.

5. The low-speed impact carbon fiber composite beam clamp as claimed in claim 1, wherein two clamp sets (3) are provided, and are respectively located on two sides of the clamp base (1).

6. A low-speed impact carbon fiber composite beam clamp as claimed in claim 1, wherein said clamp set clamps (4) are provided with four.

7. A low-speed impact carbon fiber composite beam clamp as claimed in claim 6, wherein said clamp set clamps (4) can be used to set span.