CN114624100A - Adjustable interlaminar shearing clamp for carbon fiber reinforced composite material - Google Patents
Adjustable interlaminar shearing clamp for carbon fiber reinforced composite material Download PDFInfo
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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Abstract
The utility model provides an adjustable interlaminar shear jig of carbon fiber reinforced composite, two clamping mechanism structures are the same, and mirror symmetry installs respectively on tensile testing machine's last chuck or lower chuck, and the two cooperate the use. When the two clamping mechanisms move downwards/upwards to the shearing working surfaces of the shearing blocks on the clamping mechanisms to be contacted under the driving of the tensile testing machine, the end surface of the sliding block connecting piece in one clamping mechanism is attached to the surface of the sliding block on the other clamping mechanism, and the carbon fiber reinforced composite material is sheared. The shear block and the fixed block can be adjusted, the slide rail is arranged, the adjusting precision is high, the assembly and disassembly are simple, the stress of the sample is uniform, and the experimental data obtained when the sample is subjected to pure shear force is reliable; the sample is not limited to a single size any more, and the device has the characteristics of good stability and high adjustment precision, so that the couple on the sample is offset, and the experimental data is more accurate.
Description
Technical Field
The invention relates to an interlayer shearing experiment technology of a carbon fiber reinforced composite material, and particularly creates an adjustable pure shearing experiment clamp.
Background
With the wide application of the carbon fiber reinforced composite material in the fields of aerospace and the like, the key point is to deeply understand the mechanical property of the carbon fiber reinforced composite material, the interlaminar shear performance is an important index of the carbon fiber reinforced composite material, and the test methods are shear block methods, +/-45-degree longitudinal and transverse shear methods and the like, wherein the more common method is a V-shaped slotting shear method and forms a standard.
Research on related aspects has been carried out at home and abroad, and devices which are similar to the invention are as follows:
the invention creation with publication number CN106226155B of Shanghai transport university in 2016 discloses a composite material sheet in-plane shear test fixture, which loads force on a through hole on a sheet through a bolt to complete in-plane shear performance test. But the clamp carries out force loading on the thin plate by the bolt, the thin plate is not subjected to pure shearing force, and the obtained data has deviation; the research object of the invention is that the application objects of the cubic composite material and the composite material sheet are different; the sample sheet used by the invention needs to be specially perforated, and the sheet can be damaged in different degrees; the invention is not simple and convenient to debug and install, and the consistency of the experiment is difficult to be ensured due to different processing precision of the plate; the invention adopts the sample without hole processing, has simple and convenient clamping and uniform stress, and has a different structure from the invention.
The aeroengine Limited liability company for aviation generators in 2021 discloses a clamp for testing the shearing performance of a composite material in the invention creation with the publication number of CN112798406A, a V-shaped slotting sample is subjected to force loading through a wedge block, and the device can effectively reduce unnecessary friction force and bending moment borne by the V-shaped slotting sample under a large load; the invention creation of Chinese airplane strength research in 2021 with publication number CN113049407A discloses a combined loading test device for testing the shearing performance of a composite material, which obtains the shearing modulus by loading a V-shaped grooving sample through a wedge-shaped block, and can realize the measurement of the shearing performance of the composite material with large deformation, large load and easy crushing. The two clamps need to perform special slotting processing on the sample, damage is caused to a sample laminate, and the shearing force borne by the V-shaped slotting sample during the experiment is not uniform, so that the measurement precision is influenced; the two clamps are not well guaranteed in adjustment precision by using bolts, the requirement on manual adjustment is high, and the experiment cost is increased; the invention adopts a sliding block and sliding rail adjusting structure, so that the precision is improved, the cost is saved, and the invention is obviously different from the invention.
In 2016 university of national defense science and technology published Master graduate thesis (Marugo, research on explosion impact damage characteristics of carbon fiber composite material laminated plates by energy-gathering cutting cables), a novel test shearing module method for applying the principle of a V-shaped grooving shearing method to a shearing block method is disclosed, a zigzag clamp is designed, and a centering shearing experiment is carried out on a cubic composite material sample of 8 × 8 × 8 mm; in the International journal of academic, West Fei of university of major graduates, 2020, a rectangular jig was introduced to perform a centered shearing of a 6X 6mm cubic composite sample. The two clamps have simple structures and are easy and convenient to operate; however, the two clamps cannot be adjusted, and the assembly precision requirement is high; the two clamps have high processing cost and long time consumption, and have different structures from the clamp.
Disclosure of Invention
The invention provides an adjustable interlaminar shearing clamp for a carbon fiber reinforced composite material, aiming at overcoming the defects that in the prior art, when a shearing experiment is carried out on the composite material, the stress of a sample is uneven, the stress is not pure shearing loading, and the clamp cannot be adjusted to adapt to the sample.
The invention comprises two clamping mechanisms, namely a first clamping mechanism and a second clamping mechanism. The two clamping mechanisms have the same structure and are respectively arranged on an upper chuck or a lower chuck of the tensile testing machine in a mirror symmetry mode, and the two clamping mechanisms are matched for use.
Each clamping mechanism comprises a pull rod, a sliding block connecting piece, a bottom plate, a sliding rail, a shearing block, a fixing block, a sliding block and a baffle. The bottom plate is a carrier of the first clamping mechanism, and a slide block connecting piece, a slide rail and a slide block are respectively arranged on one side surface of the bottom plate; the sliding block connecting piece is positioned at one end of the side surface of the bottom plate; the sliding rail is positioned at the symmetrical center of the side surface of the bottom plate in the width direction and extends to the other end of the bottom plate; the slide block is clamped on the slide rail. The shear block is fixed on the upper surface of the bottom plate, so that the shear block is sleeved on the sliding rail. And a fixed block is sleeved at the cantilever end of the shear block and can horizontally move along the shear block. A baffle is arranged on the end face of one end of the bottom plate, which is provided with the sliding block; the lower surface of the slide block connecting piece is provided with a pull rod.
When the first clamping mechanism and the second clamping mechanism respectively move downwards/upwards under the driving of the tensile testing machine to the shearing working surface of the shearing block on each clamping mechanism to be contacted, the end surface of the sliding block connecting piece on the first clamping mechanism is attached to the surface of the sliding block on the second clamping mechanism, and the end surface of the sliding block connecting piece on the second clamping mechanism is attached to the surface of the sliding block on the first clamping mechanism; the two binding surfaces are respectively fastened. Length b of the binding face120-35 mm wide c117-27 mm; the binding surface is distributed with sliding block connecting holes.
One end of the sliding block connecting piece is a connecting section, and the end of the connecting section is inserted into the slot on the side surface of the bottom plate and fixed, so that the sliding block connecting piece forms a cantilever beam structure. The end face of the cantilever end of the slide block connecting piece is a binding face of the slide block. And the outer side surface of the connecting section is provided with a pull rod mounting hole, and the central lines of the pull rod mounting holes respectively positioned on the two clamping mechanisms are coaxial and pass through the geometric center of the sample clamped between the two shearing blocks. Length a of the slider link152-60 mm, and the cross section of the connecting section is b2×c2(ii) a Wherein, b2＝12～16mm，c2＝10～14mm。
The joint surface end of the sliding block connecting piece and the connecting section are in transition through an inclined plane, and the angle alpha of the inclined plane125-35 deg. The pull rodDistance d between the central line of the rod mounting hole and the binding surface of the slider connecting piece1＝12～20mm。
The sliding block is in a rectangular block shape. A sliding groove in sliding fit with the sliding rail is arranged on the surface of one side of the sliding block; the surface of the other side of the sliding block connecting piece is distributed with a thread blind hole connected with the sliding block connecting piece; the position of each threaded blind hole corresponds to the position of a through hole on the slide block connecting piece matched with the threaded blind hole.
And clamping grooves of the shear blocks are processed on the symmetrical surfaces of the bottom plate in the length direction. Length b of the base plate3120-140 mm, width c320-35 mm. The depth b of the slot at the end of the connecting section on the bottom plate412-16 mm, width c410-14 mm. The middle part of the bottom plate is provided with a through hole; the position of the through hole corresponds to the position of the fixed block positioned on the cutting block, and the center line of the through hole is superposed with the geometric center of the clamped test block.
Length a of the cutout235-50 mm. A clamping groove matched with the bottom plate is formed in the end face of one end of the shear block, the shear block is clamped on the surface of the bottom plate through the clamping groove and is fixed through a bolt, and a fixed end of the shear block is formed; wall thickness c of the slot55.5 to 7mm, depth d220-30 mm. A fixed block is sleeved at the cantilever end of the shear block, and the end surface of the cantilever is b6×c6Wherein b is6＝20～35mm，c6＝14～20mm。
The fixed block is in a shape like a Chinese character 'hui', a square hole on the fixed block is used for being sleeved on the cantilever end of the shear block, and the distance d from one long edge of the square hole to the outer surface of the side is ensured32 ~ 6mm, has formed the narrow end with the slider homonymy. The outer side length of the fixed block is b7×c7Wherein b is7＝30～45mm，c7＝22～30mm。
The invention clamps the test piece before the experiment, firstly contacts the test piece with the upper and lower shear blocks, then fixes the left and right ends of the test piece through the left and right fixed blocks propped by the bolts, and finally finely adjusts the bolts at the two ends to move the test piece to the middle. The pull rod moves upwards under the action of the stretcher, the lower pull rod moves downwards, the shearing blocks on the same side are driven to move towards the same direction, the test is finished when the lower ends of the shearing blocks are overlapped, and the test piece is cut into two halves to obtain data.
According to the invention, the shearing block can keep linear sliding under the action of the sliding rail, the sliding is smooth, the displacement in the experiment process can be ensured to be linear, the fixing block can move on the shearing block, so that the adjustment can be realized, the adaptation to a test piece can be realized, the couple of the test sample to the gravity center in the experiment can be balanced, and the pure shearing experiment can be realized. Fig. 14 is an experimental data diagram, and it can be seen from the diagram that the difference between the two curves is large, the slope changes for many times in one curve, and the positive slope and the negative slope appear simultaneously, which shows that the experimental stability is poor and the precision is not high.
The shear block and the fixed block can be adjusted, the slide rail is arranged, the adjusting precision is high, the assembly and disassembly are simple, the stress of the sample is uniform, and the experimental data obtained when the sample is subjected to pure shear force is reliable; the test sample is not limited to a single size any more, and not only can be used for testing a test piece with the size of 6 multiplied by 6mm, but also can be used for testing a test piece with the size of 12 multiplied by 12mm or even larger; the invention has repeatability and saves the processing cost and time consumption of the experiment on the clamp. Fig. 15 is an experimental data chart, which can be obtained from the chart, the two curves are smoother, the slope is similar, the descending curve is a straight line which is reduced to a value of 0, it can be seen that the stability of the invention is good, and simultaneously, the force couple of the sample is offset due to high adjusting precision, and the experimental data is more accurate.
FIG. 14 is a data diagram after an experiment is carried out under the rectangular fixture, and it can be seen from the data diagram that the curve is not smooth, the stability of the sudden change of slope is low, the stress extreme value difference of the two experimental curves is large and does not present a straight line return to zero, and the measured data precision is not high and does not conform to the model; FIG. 15 is a data diagram obtained after the experiment of the present invention, the curve is smooth, the slope error is small, the difference of the stress extreme values of the two experiments is not large, and the test piece presents a straight line return-to-zero coincidence model after shearing.
Drawings
FIG. 1 is a composite material sheet in-plane shear test fixture developed by Shanghai university of transportation.
FIG. 2 is a fixture for testing the shearing performance of a composite material, which is developed by the aviation engine, Inc. of China.
FIG. 3 is a Z-shaped shearing clamp developed by national defense science and technology university.
FIG. 4 is a combined loading test device developed by the Chinese airplane strength research institute for testing the shearing performance of composite materials.
Figure 5 is a rectangular jig developed by university of great graduate.
Fig. 6 is a schematic structural diagram of the present invention.
Fig. 7 is an isometric view of fig. 6.
FIG. 8 is a schematic structural view of a first clamping mechanism; wherein fig. 8a is a front view and fig. 8b is an isometric view of fig. 8 a.
FIG. 9 is an experimental evolution of the present invention; fig. 9a is a schematic diagram of the first clamping mechanism and the second clamping mechanism, and fig. 9b is a schematic diagram of the process of the first clamping mechanism and the second clamping mechanism in fig. 9 a.
FIG. 10 is a schematic view of a slider link construction; in which fig. 10a is a front view, fig. 10b is a left side view of fig. 10a, and fig. 10c is a sectional view taken along line a-a of fig. 10 a.
FIG. 11 is a schematic view of a backplane construction; fig. 11a is a front view, and fig. 11b is a side view of fig. 11 a.
FIG. 12 is a schematic view of a cutout structure; fig. 12a is a front view, and fig. 12b is a side view of fig. 12 a.
Fig. 13 is a schematic view of a fixed block structure.
Fig. 14 is a graph of experimental data under the prior art.
FIG. 15 is a graph of experimental data for the present invention. In the figure: 1. a pull rod; 2. a slider connection; 3. a base plate; 4. a slide rail; 5. cutting the block; 6. a fixed block; 7. a slider; 8. a baffle plate; 9. a test piece; 10. a bolt; 11. and (6) a binding surface.
Detailed Description
The embodiment is an adjustable test fixture for interlaminar shear of a composite material, and the adjustable test fixture comprises two clamping mechanisms, namely a first clamping mechanism and a second clamping mechanism. The two clamping mechanisms are respectively arranged on an upper chuck or a lower chuck of the tensile testing machine in a mirror symmetry mode, and the two clamping mechanisms are matched for use.
The two clamping mechanisms are identical in structure and are in mirror symmetry. The present embodiment is described by taking the first clamping mechanism as an example.
The first clamping mechanism comprises a pull rod 1, a sliding block connecting piece 2, a bottom plate 3, a sliding rail 4, a shearing block 5, a fixing block 6, a sliding block 7 and a baffle plate 8. Wherein, the bottom plate 3 is a carrier of the first clamping mechanism, and a slide block connecting piece, a slide rail and a slide block are respectively arranged on one side surface of the bottom plate; the sliding block connecting piece is positioned at one end of the side surface of the bottom plate; the slide rail is positioned at the symmetrical center of the side surface of the bottom plate in the width direction and extends to the other end of the bottom plate; the slide block is clamped on the slide rail. The shear block 5 is fixed on the upper surface of the bottom plate, so that the shear block is sleeved on the slide rail. The fixed block 6 is sleeved at the cantilever end of the shear block and can horizontally move along the shear block. A baffle plate 8 is arranged on the end surface of one end of the bottom plate, which is provided with the slide block; a pull rod 1 is arranged on the lower surface of the slide block connecting piece 2.
When the clamping device works, when the first clamping mechanism and the second clamping mechanism respectively move downwards/upwards to the shearing working surfaces of the shearing blocks 5 on the clamping mechanisms under the driving of the tensile testing machine to be contacted, the end surface of the sliding block connecting piece 2 on the first clamping mechanism is attached to the surface of the sliding block on the second clamping mechanism, and the end surface of the sliding block connecting piece on the second clamping mechanism is attached to the surface of the sliding block on the first clamping mechanism; the two binding surfaces are fastened through bolts.
The slide block connecting piece 2 is in a T shape and is machined from 45# steel. One end of the sliding block connecting piece is a connecting section, and the end of the connecting section is inserted into the slot on the side surface of the bottom plate and is fixed through a bolt, so that the sliding block connecting piece forms a cantilever beam structure. The end face of the cantilever end of the slider connecting piece is the binding face 11 of the slider. And the outer side surface of the connecting section is provided with a pull rod mounting hole, and the central lines of the pull rod mounting holes respectively positioned on the two clamping mechanisms are coaxial and pass through the geometric center of the sample clamped between the two shearing blocks 5.
In this embodiment, the bonding surface 11 is rectangular, and has a length b120 to 35mm, width c117-27 mm; two groups of 4 through holes are symmetrically distributed on the binding surface, and each through hole is respectively used for connecting the sliding block 6. Length a of the slider link152-60 mm, the cross section of the connecting section is b2×c2(ii) a Wherein, b2＝12～16mm，c2＝10～14mm。
The joint surface end of the sliding block connecting piece 2 and the connecting section are transited through an inclined plane, and the angle alpha of the inclined plane125-35 degrees. The distance d between the central line of the pull rod mounting hole and the binding surface of the slide block connecting piece1＝12～20mm。
In this example, b1＝29mm，c1＝17mm，a1＝52mm，b2＝12mm，c2＝10mm，α1＝30°，d1＝12mm。
The sliding block 7 is in a rectangular block shape. A sliding groove which is in sliding fit with the sliding rail 4 is arranged on the surface of one side of the sliding block; the surface of the other side of the sliding block connecting piece is distributed with a threaded blind hole connected with the sliding block connecting piece; the position of each threaded blind hole corresponds to the position of a through hole on the slide block connecting piece matched with the threaded blind hole.
In this embodiment, the outer dimension of the slider is the same as the outer dimension of the contact surface 11 of the slider connector.
The bottom plate 3 is machined from 45# steel. The symmetrical surface of the bottom plate in the length direction is provided with a clamping groove of a shear block 5. Length b of the base plate3120-140 mm, width c320-35 mm. The depth b of the slot at the end of the connecting section on the bottom plate412-16 mm, width c410-14 mm. The middle part of the bottom plate is provided with a through hole; the position of the through hole corresponds to the position of the fixed block positioned on the cutting block, and the center line of the through hole is superposed with the geometric center of the clamped test block. In this example, b3＝120mm，c3＝20mm，b4＝12mm，c4＝10mm。
The shear block 5 is machined from 45# steel and has the length a235-50 mm. A clamping groove matched with the bottom plate is formed in the end face of one end of the shear block, the shear block is clamped on the surface of the bottom plate through the clamping groove and is fixed through a bolt, and a fixed end of the shear block is formed; wall thickness c of the slot55.5 to 7mm, depth d220-30 mm. A fixed block 6 is sleeved at the cantilever end of the shear block, and the end surface of the cantilever is b6×c6Wherein b is6＝20～35mm，c614-20 mm. In this example, a2＝37mm，c5＝5.5mm，d2＝20mm，b6＝20mm，c6＝14mm。
The fixed block 6 is in a shape of a Chinese character 'hui', and is processed by 45# steel. The length of the outer side of the fixed block is b7×c7Wherein b is7＝30～45mm，c722-30 mm. The square hole on the fixed block is used for being sleeved on the cantilever end of the shear block 5, and the distance d from one long edge of the square hole to the outer surface of the side 32 ~ 6mm, has formed the narrow end with the slider homonymy. In this example, b7＝30mm，c7＝22mm，d3＝2mm。
The pull rod 1 is made of 45 steel, and the large diameter D is 8-10 mm. In this example, D is 8 mm.
The slide rail 4 and the slide block 7 are both in the prior art.
The stop dog 8 is connected with the bottom plate through a bolt, is positioned on the end face of the slide rail and is used for preventing the slide block from being separated from the slide rail in the experiment process.
The bolt 10 is screwed into the fixed block 4 to be tightly attached before the experiment so as to prevent the fixed block from slipping and prevent a test sample in the experiment from generating a couple.
During installation, the lower end of the pull rod 1 is clamped by a chuck of the testing machine, and the upper end of the pull rod is connected with the sliding block connecting piece 2 through threads; the smaller end of the section of the sliding block connecting piece 2 is embedded into the square hole of the bottom plate 3 and is positioned by bolts; the slide rails 4 are placed on the bottom plate 3, and the through holes in the slide rails correspond to the threaded holes in the bottom plate 3 one by one and are fastened by bolts; one U-shaped end of the shear block 5 is inserted into the I-shaped groove of the bottom plate 3, is in clearance fit with the slide rail 4, and penetrates through the bottom plate 3 and is fastened with the shear block 5 by bolts; the asymmetric square through hole of the fixed block 6 is sleeved at the other end of the shear block 5, and the narrow end of the fixed block is opposite to the stretching direction; fitting said slider 7 into said slide; the stop block 8 is connected with the bottom plate 3 through threaded connection; and finally, connecting the slider connecting piece 2 with the slider 7 through threads respectively.
Before the experiment, the end surface of the sliding block connecting piece 2 on the first clamping mechanism is attached to the surface of the sliding block on the second clamping mechanism, the end surface of the sliding block connecting piece on the second clamping mechanism is attached to the surface of the sliding block on the first clamping mechanism, and the two attaching surfaces are fastened through bolts respectively; the upper surface and the lower surface of a test piece 9 are attached to the shearing block surfaces of the two clamping mechanisms, the bolt 10 of the first clamping mechanism is adjusted to enable the fixing block to attach to the left surface of the test piece, the operation is repeated to enable the fixing block of the second clamping mechanism to attach to the right surface of the test piece, and the bolts at the two ends are finely adjusted to move the test piece to the central position. During working, the first clamping mechanism and the second clamping mechanism are driven by the tensile testing machine to move downwards/upwards respectively, and when the shearing working surfaces of the shearing blocks 5 on the two clamping mechanisms are in contact, the test piece is sheared completely, and experimental data are obtained.
Claims (10)
1. The adjustable interlaminar shearing clamp for the carbon fiber reinforced composite material is characterized by comprising two clamping mechanisms, namely a first clamping mechanism and a second clamping mechanism; the two clamping mechanisms have the same structure, are respectively arranged on an upper chuck or a lower chuck of the tensile testing machine in a mirror symmetry mode, and are matched for use;
each clamping mechanism comprises a pull rod, a sliding block connecting piece, a bottom plate, a sliding rail, a shearing block, a fixed block, a sliding block and a baffle plate; the bottom plate is a carrier of the first clamping mechanism, and a slide block connecting piece, a slide rail and a slide block are respectively arranged on one side surface of the bottom plate; the sliding block connecting piece is positioned at one end of the side surface of the bottom plate; the slide rail is positioned at the symmetrical center of the side surface of the bottom plate in the width direction and extends to the other end of the bottom plate; the slide block is clamped on the slide rail; the shear block is fixed on the upper surface of the bottom plate, so that the shear block is sleeved on the slide rail; a fixed block is sleeved at the cantilever end of the shear block and can horizontally move along the shear block; a baffle is arranged on the end face of one end of the bottom plate, which is provided with the sliding block; the lower surface of the slide block connecting piece is provided with a pull rod.
2. The adjustable interlaminar shear fixture of carbon fiber reinforced composite material according to claim 1, characterized in that when the first clamping mechanism and the second clamping mechanism are respectively driven by the tensile testing machine to move downwards/upwards to contact with the shearing working surface of the shear block on each clamping mechanism, the end surface of the slide block connecting piece on the first clamping mechanism is attached to the surface of the slide block on the second clamping mechanism, and the end surface of the slide block connecting piece on the second clamping mechanism is attached to the surface of the slide block on the first clamping mechanism; the two binding surfaces are fastened respectively.
3. The adjustable interlaminar shear fixture of carbon fiber reinforced composite material as claimed in claim 1, wherein one end of the slide block connecting piece is a connecting section, and the end of the connecting section is inserted into the slot on the side surface of the bottom plate and fixed, so that the slide block connecting piece forms a cantilever beam structure; the end surface of the cantilever end of the slide block connecting piece is a binding surface of the slide block; and the outer side surface of the connecting section is provided with a pull rod mounting hole, and the central lines of the pull rod mounting holes respectively positioned on the two clamping mechanisms are coaxial and pass through the geometric center of the sample clamped between the two shearing blocks.
4. The carbon fiber reinforced composite adjustable interlaminar shear clamp of claim 3, wherein the length a of the slider connectors152-60 mm, the cross section of the connecting section is b2×c2(ii) a Wherein, b2＝12～16mm，c2＝10～14mm；
Length b of the binding face120 to 35mm, width c117-27 mm; the binding surface is distributed with sliding block connecting holes.
5. The adjustable interlaminar shear clamp of carbon fiber reinforced composite material according to claim 3, wherein the end of the attachment surface of the slider connector is in transition with the connecting section via an inclined surface having an angle α125-35 °; the distance d between the central line of the pull rod mounting hole and the binding surface of the slide block connecting piece1＝12～20mm。
6. The adjustable interlaminar shear clamp of carbon fiber reinforced composite as claimed in claim 1, wherein the slide block is rectangular block-shaped; a sliding groove in sliding fit with the sliding rail is arranged on the surface of one side of the sliding block; the surface of the other side of the sliding block connecting piece is distributed with a threaded blind hole connected with the sliding block connecting piece; the position of each threaded blind hole corresponds to the position of a through hole on the slide block connecting piece matched with the threaded blind hole.
7. The adjustable interlaminar shearing fixture of carbon fiber reinforced composite material as claimed in claim 1, characterized in that the symmetrical plane of the bottom plate in the length direction is provided with a clamping groove of a shearing block; length b of the base plate3120 to 140mm, width c320-35 mm; the depth b of the slot at the end of the connecting section on the bottom plate412-16 mm, width c410-14 mm; the middle part of the bottom plate is provided with a through hole; the position of the through hole corresponds to the position of the fixed block positioned on the cutting block, and the center line of the through hole is superposed with the geometric center of the clamped test block.
8. The adjustable interlaminar shear clamp of carbon fiber reinforced composite material according to claim 1, wherein the length a of the shear block235-50 mm; a clamping groove matched with the bottom plate is formed in the end face of one end of the shear block, the shear block is clamped on the surface of the bottom plate through the clamping groove and is fixed through a bolt, and a fixed end of the shear block is formed; the wall of the clamping grooveThickness c55.5 to 7mm, depth d220-30 mm; a fixed block is sleeved at the cantilever end of the shear block, and the end surface of the cantilever is b6×c6Wherein b is6＝20～35mm，c6＝14～20mm。
9. The adjustable interlaminar shearing fixture of carbon fiber reinforced composite material as claimed in claim 1, wherein the fixing block is in a shape of a Chinese character 'hui', a square hole on the fixing block is used for being sleeved on the cantilever end of the shearing block, and a long side of the square hole is away from the outer surface of the side by a distance d32 ~ 6mm, has formed the narrow end with the slider homonymy.
10. The adjustable interlaminar shear clamp of carbon fiber reinforced composite material as claimed in claim 9, wherein the length of the outer edge of the fixing block is b7×c7Wherein b is7＝30～45mm，c7＝22～30mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210262374.5A CN114624100A (en) | 2022-03-16 | 2022-03-16 | Adjustable interlaminar shearing clamp for carbon fiber reinforced composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210262374.5A CN114624100A (en) | 2022-03-16 | 2022-03-16 | Adjustable interlaminar shearing clamp for carbon fiber reinforced composite material |
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| Publication Number | Publication Date |
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| CN114624100A true CN114624100A (en) | 2022-06-14 |
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|---|---|---|---|
| CN202210262374.5A Pending CN114624100A (en) | 2022-03-16 | 2022-03-16 | Adjustable interlaminar shearing clamp for carbon fiber reinforced composite material |
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| CN (1) | CN114624100A (en) |
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2022
- 2022-03-16 CN CN202210262374.5A patent/CN114624100A/en active Pending
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