Compression test device for composite material thin-wall structure sample piece

Abstract

The utility model discloses a compression test device for composite material thin-walled structure sample piece, including: clamps, anti-instability baffle and compression loading structure, the clamps are divided into two groups, are arranged at interval and are used for clamping the two side edges of the sample piece, each group of clamps comprises two support frames and two clamping plates, the two clamping plates in each group of clamps are respectively connected to the opposite sides of the two supporting frames in the group of clamps, and the opposite end surfaces of the two clamping plates in each group of clamps and the front and rear end surfaces of the corresponding side edges of the sample piece are designed in a shape following manner; the anti-instability baffles are correspondingly attached to the front portion and the rear portion of the sample piece, the two ends of each anti-instability baffle are connected with the two clamps respectively, and the compression loading structure is located over the position between the two clamps and used for applying compression loads to the sample piece. According to the compression test device, effective clamping of the sample piece can be guaranteed, instability and deformation of the sample piece in the compression process can be prevented, and the precision and reliability of a compression test are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of aerospace technology, and in particular provides a compression testing device for thin-walled composite material specimens. Background Technology

[0002] The large-scale application of composite materials is a major means of reducing the weight of aircraft structures. To verify the rationality of structural design, structural strength tests are a necessary assessment method. Among them, the compression test of composite material specimens is the main test in structural strength testing. For thin-walled composite material specimens, if the traditional test fixtures are still used to clamp the two ends of the specimens before compression testing, the thin-walled specimens may become unstable during the compression test, making it impossible to carry out the compression test and failing to guarantee the accuracy and reliability of the compression test. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a compression testing device for thin-walled composite material specimens, so as to solve the problems existing in traditional compression testing devices.

[0004] The technical solution provided by this utility model is: a compression testing device for thin-walled composite material specimens, comprising: clamps, anti-instability baffles, and a compression loading structure. The clamps are arranged in two sets at intervals, respectively used to clamp the two sides of the specimen. Each set of clamps includes two support frames and two clamping plates. The two support frames in each set are respectively positioned in front of and behind one side edge of the specimen. The two clamping plates in each set are respectively connected to the opposite sides of the two support frames in that set. The opposite end faces of the two clamping plates in each set are designed to conform to the front and rear end faces of the corresponding side edge of the specimen. The anti-instability baffles are correspondingly fitted to the front and rear of the specimen, with both ends connected to the two sets of clamps, to prevent instability and deformation of the specimen. The compression loading structure is located directly above the two sets of clamps and is used to apply a compressive load to the specimen fixedly clamped between the two sets of clamps.

[0005] Preferably, the two support frames in each set of fixtures have the same structure and are arranged opposite each other, and the support frame is a right-angled triangular stable structure.

[0006] Further preferred, the two support frames in each set of clamps are connected by a first fastener.

[0007] Further preferably, the support frame and the clamping plate are connected by a second fastener.

[0008] Further preferably, each set of fixtures has pads connected to the opposite sides of the two support frames, the pads being used to clamp the reinforcing plates installed at the upper and lower ends of the sample.

[0009] Further preferably, the support frame and the pad are connected by a third fastener.

[0010] Further preferably, the compression testing device for composite thin-walled structural specimens further includes a pressure plate connected to the fixture for fixing the fixture to the test bench.

[0011] Further preferably, the compression loading structure includes an upper pressure bucket, a loading head, and a driving device. The driving device is connected to the upper pressure bucket through the loading head and is used to apply a compressive load to the sample through the upper pressure bucket.

[0012] The compression testing device for thin-walled composite material specimens provided by this utility model can effectively clamp the specimen by designing the clamping plate to conform to the front and rear end faces of the specimen edge. By setting an anti-instability baffle, the specimen can be prevented from becoming unstable and deformed during compression, thus ensuring the accuracy and reliability of the compression test. Attached Figure Description

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 A schematic diagram of the compression testing device for thin-walled composite material specimens provided by this utility model. Detailed Implementation

[0015] The present invention will be further explained below with reference to specific implementation schemes, but it is not limited to the present invention.

[0016] To address the issue that traditional compression testing apparatuses are unsuitable for thin-walled specimens, such as... Figure 1 As shown, this utility model provides a compression testing device for thin-walled composite material specimens, comprising: clamps, anti-instability baffles 2, and a compression loading structure. The clamps are arranged in two sets at intervals, respectively used to clamp the two side edges of the specimen 10. Each set of clamps includes two support frames 11 and two clamping plates 12. The two support frames 11 in each set are respectively positioned in front of and behind one side edge of the specimen 10. The two clamping plates 12 in each set are respectively connected to the opposite sides of the two support frames 11 in that set. The opposite end faces of the two clamping plates 12 in each set are designed to conform to the front and rear end faces of the corresponding side edge of the specimen 10, thereby achieving close clamping of the front and rear end faces of the corresponding side edge of the specimen 10. The anti-instability baffles 2 are correspondingly fitted to the front and rear of the specimen 10, with both ends connected to the two sets of clamps, to prevent the specimen 10 from becoming unstable and deformed. Preferably, multiple sets of anti-instability baffles are arranged at intervals along the compression load direction. Figure 1The embodiment of two sets of anti-instability baffles is given. The compression loading structure is located directly above the two sets of clamps and is used to apply a compressive load to the specimen 10 that is fixedly clamped between the two sets of clamps.

[0017] This compression testing device for thin-walled composite material specimens ensures effective clamping of the specimens by designing the clamping plates to conform to the front and rear end faces of the specimen edges. By setting anti-instability baffles, it can prevent the thin-walled specimens from becoming unstable and deformed during compression, thus ensuring the accuracy and reliability of the compression test.

[0018] The method for performing a compression test using this compression testing device is as follows: First, fix the fixture; then, install the specimen and clamp the clamping plate to fit and hold the specimen on both sides of the specimen; next, install the anti-instability baffle; finally, apply a compressive load to the specimen using the compression loading structure to perform the compression test.

[0019] As an improvement to the technical solution, such as Figure 1 As shown, the two support frames 11 in each set of fixtures have the same structure and are arranged opposite each other. The support frame 11 is a right-angled triangular stable structure.

[0020] As an improvement to the technical solution, such as Figure 1 As shown, the two support frames 11 in each set of clamps are connected by a first fastener 13, which can be a bolt and nut adjustment structure.

[0021] As an improvement to the technical solution, such as Figure 1 As shown, the support frame 11 and the clamping plate 12 are connected by a second fastener 14, which can be a bolt and nut adjustment structure.

[0022] As an improvement to the technical solution, such as Figure 1 As shown, each set of fixtures has two support frames 11 with corresponding pads 15 on opposite sides. The pads 15 are used to clamp the reinforcing plates 20 installed at the upper and lower ends of the sample piece 10.

[0023] As an improvement to the technical solution, such as Figure 1 As shown, the support frame 11 and the pad 15 are connected by a third fastener 16, which can be a bolt and nut adjustment structure.

[0024] As an improvement to the technical solution, such as Figure 1 As shown, the compression testing device for thin-walled composite material specimens also includes a pressure plate 4 connected to the fixture, which is used to fix the fixture on the test bench.

[0025] As an improvement to the technical solution, such as Figure 1As shown, the compression loading structure includes an upper pressure bucket 31, a loading head 32, and a driving device. The driving device is connected to the upper pressure bucket 31 through the loading head 32 and is used to apply a compressive load to the sample 10 through the upper pressure bucket 31.

[0026] The specific embodiments of this utility model are written in a progressive manner, emphasizing the differences between each implementation scheme, and the similar parts can be referred to each other.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A compression testing apparatus for thin-walled composite material specimens, characterized in that, The utility model relates to a kind of compression test device, including: Clamp, anti-instability baffle (2) and compression loading structure, wherein the clamp is two groups and interval arrangement, and is used for clamping the two side edges of test piece (10) respectively, and each group of clamps includes two support frames (11) and two clamping plates (12), two support frames (11) in each group of clamps are correspondingly arranged in front and back of the side edge of test piece (10), and two clamping plates (12) in each group of clamps are connected to the opposite side of two support frames (11) in the group of clamps, and the opposite end surface of two clamping plates (12) in each group of clamps is conformal design with the front and back end surface of the corresponding side edge of test piece (10), the anti-instability baffle (2) is correspondingly attached to the front and back of test piece (10) and two ends are connected with two groups of clamps respectively, for preventing test piece (10) from unstable deformation, and the compression loading structure is located directly above between two groups of clamps, for applying compression load to test piece (10) fixedly clamped between two groups of clamps.

2. The compression testing apparatus for a composite thin-walled structure test specimen according to claim 1, wherein: Two support frames (11) in each group of clamps are identical in structure and oppositely arranged, and the support frame (11) is a right-angled triangle stable structure.

3. The compression testing apparatus for a composite thin-walled structure test specimen of claim 1, wherein: Two support frames (11) in each group of clamps are connected by first fastener (13).

4. The compression testing apparatus for a composite thin-walled structure test specimen of claim 1, wherein: The support frame (11) and the clamping plate (12) are connected by second fastener (14).

5. The compression testing apparatus for a composite thin-walled structure test specimen of claim 1, wherein: The opposite side of two support frames (11) in each group of clamps is correspondingly connected with pad (15), and the pad (15) is used for clamping and installing reinforcing sheet (20) on the upper and lower ends of test piece (10).

6. The compression testing apparatus for a composite thin-walled structure test specimen of claim 5, wherein: The support frame (11) and the pad (15) are connected by third fastener (16).

7. The compression testing apparatus for composite thin-walled structure test coupons of claim 1, wherein: It also includes pressing plate (4) connected with the clamp, for fixing the clamp on test bench.

8. The compression testing apparatus for composite thin-walled structure test coupons of claim 1, wherein: The compression loading structure includes upper compression hopper (31), loading head (32) and driving device, the driving device is connected with the upper compression hopper (31) through the loading head (32), for applying compression load to test piece (10) through the upper compression hopper (31).

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