CN109507027A - Test sample, fixture and the method for Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity - Google Patents
Test sample, fixture and the method for Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity Download PDFInfo
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- CN109507027A CN109507027A CN201811365625.2A CN201811365625A CN109507027A CN 109507027 A CN109507027 A CN 109507027A CN 201811365625 A CN201811365625 A CN 201811365625A CN 109507027 A CN109507027 A CN 109507027A
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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Abstract
A kind of test method of Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity of the present invention can be suitable for hot environment, and the aspect of measure out-draw intensity in the case where ceramic matric composite plate only has 4~10mm range.It is tested using cross test sample of the present invention and the frock clamp with cross recess, can be realized and carry out test experiments in the environment of room temperature~2200 DEG C；Guarantee that sample moves down the active force that end is respectively subjected to 1/2F simultaneously, can make the sample moves down end uniform force, so that demixing zone be made uniformly to tear.Therefore, the present invention solves the problems, such as the problem of cannot uniformly tearing when out-draw intensity in Continuous Fiber Reinforced Ceramic Matrix Composites face is difficult to measure under hot environment and test sample destroys.
Description
Technical field
The invention belongs to the fields of Continuous Fiber Reinforced Ceramic Matrix Composites, and in particular to a kind of continuous fiber reinforcement pottery
The test method of porcelain based composites face out-draw intensity.
Background technique
Due to Continuous Fiber Reinforced Ceramic Matrix Composites have it is high-intensitive than, it is high-modulus ratio, corrosion resistance, anti-oxidant etc.
Advantage becomes the indispensable material of aero-engine of new generation.In order to guarantee that testing experiment is complicated close to true aero-engine
Use environment, testing experiment need in atmospheric environment, vacuum environment, inert ambient environment and other corrosive environments and room
Is carried out under temperature, hot environment
Structure determines property, since Continuous Fiber Reinforced Ceramic Matrix Composites are designed to slab construction, property in face
Can often outer high an order of magnitude of performance of specific surface, therefore performance is the weak link of whole knot component outside its face.Really make
With in environment, structural member is not only acted on by complicated load, is often coupled along with oxidation, fatigue, creep, thermodynamics etc.
Effect, therefore it is concerned about that the weak link of structural member is of crucial importance.In actual use, Continuous Fiber Reinforced Ceramic Matrix Composites
Thickness there was only several millimeters or so, cause performance outside its face to be difficult to measure, carry out structure optimization and Simulation Engineering to designer
Shi Jinhang analytical calculation brings difficulty.U.S. ASTM C1468-00 testing standard (Test Method for
Transthickness Tensile Strength of CFCCs at Ambient Temperature.) it is surveyed using gluing
Determine Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity, but the case where meeting generating material/viscose glue unsticking, Wu Fajing
Really measurement Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity.Furthermore there is no at present be resistant to it is 1000 DEG C or more high
Temperature and the high-temp glue for keeping higher-strength, therefore the standard is not applied for hot environment.Therefore, it measures continuous under hot environment
Out-draw intensity in fiber reinforced ceramic matrix composites face is a technical problem.
Summary of the invention
A kind of technical problems to be solved: survey of Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity of the present invention
Method for testing solves the problems, such as that out-draw intensity in Continuous Fiber Reinforced Ceramic Matrix Composites face is difficult to measure under hot environment,
The problem of cannot uniformly being torn when being destroyed with test sample.
The technical scheme is that a kind of test of Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity tries
Sample, it is characterised in that: the sample is divided into X plate and Y plate for plate structure with a thickness of 4~10mm；The X plate and Y plate are mutual
Intersect at vertical and center, is in cross structure；Sample center intersection is the cube structure of 3~10mm of width；Institute
It states cube structure and is located at and be provided with first to be parallel to each other on the outside of two relative edges in the sample X plate upper surface face and cut
Mouthful, first cuts parallel is in the Y plate；The cube structure is located at two relative edges of the sample Y plate lower surface
Outside be provided with the second notch being parallel to each other, second cuts parallel is in the X plate；First notch and second is cut
Mouthful it is of same size, and be 0.1~1mm, length is equal to the width of the cube structure, and depth is equal to sample thickness
Half, the bottom surface of first notch and the second notch is in same plane；In the X plate and Y plate center cross-shaped portion of the sample
Divide the demixing zone for being formed in parallel with the sample upper and lower surfaces, the demixing zone is the bottom with first notch, the second notch
In conplane square, it is 3~10mm that width is of same size with the cube structure in face.
A kind of test fixture fixture of Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity, it is characterised in that:
The frock clamp includes upper fixture and lower fixture；The lower fixture is block structure, and surface is provided with and the examination on it
The corresponding cross recess of sample；The sample and the cross recess are clearance fit, and being capable of edge in the cross recess
It is mobile perpendicular to the direction of cross recess bottom surface；The cross recess is divided into groove a ' b ' and groove e two parts, the groove a '
The depth of b ' is greater than the thickness of the sample, and for the positioning of the sample, the depth of the groove e is greater than the groove a ' b '
Depth；When the test specimen is mounted on the partial compression deformation of the groove e, can continue to the bottom the groove e
It is mobile；The depth difference of the groove e and groove a ' b ' is greater than the thickness of the test specimen, can be the demixing zone of the sample
Fracture provides space；
The upper fixture is plate structure, and bottom width is equal to the X plate of the sample or the width of Y plate, bottom surface
Length be greater than the sample X plate or Y plate length, and with the groove e clearance fit, can be along perpendicular to cross recess bottom
The direction in face is mobile；The upper fixture bottom surface is provided with the groove c ' d ' matched with the X plate of the sample or Y plate, for fixed
The position sample is placed on the part in the groove e；Fluted f is set among the groove bottom of the groove c ' d ', it is described recessed
The depth of slot f is greater than the thickness of the sample, can be broken for the demixing zone of the sample and provide space；Table in the upper fixture
Face is convex arc structure, allows what mechanics machine was applied to that the load of upper fixture is uniformly applied to the sample to move down end；
A kind of test method of Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity, it is characterised in that specific step
It is rapid as follows:
Step 1: the Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw strength specimen is accurately processed；
Step 2: the frock clamp of design processing and sample cooperation；
Step 3: the sample is installed in the frock clamp；
Sample notch Y plate directed downwardly is mounted in the groove a ' b ' of the lower fixture, the sample notch is upward
X plate be mounted in the groove e of the lower fixture；By the upper fixture bottom surface towards the lower fixture, the upper fixture it is recessed
The X plate of slot c ' d ' and the sample is fitted in the groove e of the lower fixture；
Step 4: the mounted sample and frock clamp are placed on testing machine for mechanical properties, setting test ginseng
Number；
Step 5: out-draw dullness load in face is applied to the upper fixture of the frock clamp, i.e., to the convex of the upper fixture
Arc active force is F, so that the active force for moving down end c, d and being respectively subjected to 1/2F of the X plate of the sample, can make the sample
Move down end uniform force；It is to sample application face out-draw dullness load until the demixing zone of the sample is destroyed, i.e., described
Sample is uniformly torn；Load-displacement curves are recorded simultaneously；
Step 6: test stops, and takes out the sample；
Step 7: according to formulaCalculating face out-draw intensity,
Wherein, σ is face out-draw intensity, FmaxFor maximal destruction load, b is that sample is layered sector width；
It carries out repeating to test three times, takes the average value of face out-draw intensity three times.
A further technical solution of the present invention is: the Range of measuring temp of the test method is room temperature to 2200 DEG C.
A further technical solution of the present invention is: the test environment of the test method be atmospheric environment, it is vacuum environment, lazy
Property atmosphere or other corrosive environments.
Beneficial effect
The beneficial effects of the present invention are: the present invention proposes a kind of out-draw of Continuous Fiber Reinforced Ceramic Matrix Composites face
The test method of intensity can be suitable for hot environment, and there was only the feelings of 4~10mm range in ceramic matric composite plate
Aspect of measure out-draw intensity under condition.It is tested using cross test sample of the present invention and the frock clamp with cross recess,
It can be realized and carry out test experiments in the environment of room temperature~2200 DEG C；Guarantee that sample moves down end c, d and is respectively subjected to 1/2F simultaneously
Active force, can make the sample moves down end uniform force, so that demixing zone be made uniformly to tear.
Sample processes notch on the two-sided relative edge in intersection, can determine layering zone position, and guarantees equal when being destroyed
Even tearing.
It is 3~10mm for delamination area side length, if width is too small, free side effect can be obvious, tests out
Face out-draw intensity it is smaller, if width is too big, delamination area area is larger necessarily to cause that sample moves down end and fixing end is held
It by biggish load, causes sample foot short, cannot be layered.
Detailed description of the invention
Fig. 1 test sample schematic diagram；
Fig. 2 test sample three-view diagram；
Fixture schematic diagram under Fig. 3；
Fig. 4 upper fixture schematic diagram；
The wide 4mm test sample of Fig. 5 two dimension fibre reinforced C-base composte material；
The wide 5mm test sample of Fig. 6 two dimension fibre reinforced C-base composte material；
The wide 6mm test sample of Fig. 7 two dimension fibre reinforced C-base composte material；
Fig. 8 room temperature environment lower leaf sector width 4mm cross structure and standard test load displacement curve figure；
Fig. 9 room temperature environment lower leaf sector width 5mm cross structure and standard test load displacement curve figure；
Figure 10 room temperature environment lower leaf sector width 6mm cross structure and standard test load displacement curve figure；
1200 DEG C of face out-draw load-displacement curves of Figure 11 vacuum environment；
The out-draw of the face Figure 12 destroys representative pictures.
Specific embodiment
The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to be used to explain the present invention, and cannot understand
For limitation of the present invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
The material used is two-dimentional fibre reinforced C-base composte material, by Northwestern Polytechnical University's superhigh temperature structure composite material
Expect that key lab provides, since chemical vapor deposition process (CVI) is limited, two-dimentional fibre reinforced C-base composte material thickness
Generally several millimeters, selection carries out sample processing using extensive 4mm plate in example.
A kind of test method of Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity of the present invention, test temperature model
It encloses for room temperature~2200 DEG C, test environment is atmospheric environment, vacuum environment, inert ambient environment or other corrosive environments.Tool
Steps are as follows for body:
Step 1: accurate processing Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw strength specimen；
Referring to Figures 1 and 2, the sample is divided into X plate and Y plate for plate structure with a thickness of 4~10mm；The X plate and Y
Plate is mutually perpendicular to and intersects at center, is in cross structure；Sample center intersection is the cube knot of 3~10mm of width
Structure；The cube structure is located at for being provided with and being parallel to each other on the outside of two relative edges in the sample X plate upper surface face
A kerf, first cuts parallel is in the Y plate；The cube structure is located at two phases of the sample Y plate lower surface
The second notch being parallel to each other is provided on the outside of opposite side, second cuts parallel is in the X plate；First notch and
Two incisions it is of same size, and be 0.1~1mm, length is equal to the width of the cube structure, and depth is equal to sample
The bottom surface of the half of thickness, first notch and the second notch is in same plane；The X plate is located at two first notch
Outer both ends are respectively the end c and the end d, and the both ends that the Y plate is located at outside two second notch are respectively the end a and the end b；Institute
The X plate and Y plate center intersection of stating sample are formed in parallel with the demixing zone of the sample upper and lower surfaces, and the demixing zone is
With first notch, the second notch bottom surface in conplane square, side length and the cube structure width phase
It is all 3~10mm, such as the hatching line region of Fig. 1 and Fig. 2；
Step 2: the frock clamp of design processing and sample cooperation；
Referring to Fig. 3 and Fig. 4, the frock clamp includes upper fixture and lower fixture；The lower fixture is cube structure,
Its upper surface is provided with cross recess corresponding with the sample；The sample and the cross recess are clearance fit, and
It can be moved along the direction perpendicular to cross recess bottom surface in the cross recess；The cross recess be divided into groove a ' b ' and
Groove e two parts, the depth of the groove a ' b ' is greater than the thickness of the sample, for the positioning of the sample, the groove e
Depth be greater than the groove a ' b ' depth；It, can when the test specimen is mounted on the partial compression deformation of the groove e
Enough continue mobile to the bottom the groove e；The depth difference of the groove e and groove a ' b ' is greater than the thickness of the test specimen,
It can be broken for the demixing zone of the sample and space is provided；
The upper fixture is plate structure, and bottom width is equal to the width of the X plate of the sample, and the length of bottom surface is big
In the length of the X plate of the sample, and with the groove e clearance fit, can along perpendicular to cross recess bottom surface direction move
It is dynamic；The upper fixture bottom surface is provided with the groove c ' d ' matched with the X plate of the sample, for positioning the X plate of the sample；
Fluted f is set among the groove bottom of the groove c ' d ', and the depth of the groove f is greater than the thickness of the sample, Neng Gouwei
The demixing zone fracture of the sample provides space；The upper fixture upper surface is convex arc structure, is applied to mechanics machine
What the load of fixture can uniformly be applied to the sample moves down end；
Step 3: the sample is installed in the frock clamp；
Sample notch Y plate directed downwardly is mounted in the groove a ' b ' of the lower fixture, the sample notch is upward
X plate be mounted in the groove e of the lower fixture；By the upper fixture bottom surface towards the lower fixture, the upper fixture it is recessed
The X plate of slot c ' d and the sample is fitted in the groove e of the lower fixture；
Step 4: the mounted sample and frock clamp are placed on testing machine for mechanical properties, setting test ginseng
Number；
Step 5: out-draw dullness load in face is applied to the upper fixture of the frock clamp, i.e., to the convex of the upper fixture
Arc active force is F, so that the active force for moving down end c, d and being respectively subjected to 1/2F of the X plate of the sample, can make the sample
Move down end uniform force；It is to sample application face out-draw dullness load until the demixing zone of the sample is destroyed, i.e., described
Sample is uniformly torn, and sample form is referring to Figure 12 after tearing；Load-displacement curves are recorded simultaneously；
Step 6, test stop, and take out the sample.
For delamination area, if width is too small, free side effect can be obvious, the face out-draw intensity tested out
Smaller, if width is too big, delamination area area is larger necessarily to cause sample to move down end and the biggish load of fixing end receiving, makes
It is short at sample foot, it cannot be layered.Delamination area design is square according in ASTM C1468-00 testing standard, the present invention
Sample demixing zone is still designed and is square.Selection for demixing zone square width, the present invention separately designed 4mm,
Tri- kinds of sizes of 5mm, 6mm, specimen length is respectively 16mm, 18mm, 20mm.It is continuously fine in order to verify cross structure Specimen Determination
The accuracy of dimension enhancing ceramic matric composite face out-draw intensity, need to select the standard test of same hierarchical level peak width with
Cross structure compares.Comparing result is as shown in Fig. 8, Fig. 9, Figure 10.
Under room temperature environment, outside cross structure measurement proposed by the present invention Continuous Fiber Reinforced Ceramic Matrix Composites face
Tensile strength result needs are compared with ASTM C1468-00 code test measurement result, find cross under room temperature environment
Structure optimal size, then carries out face out-draw strength detection under high temperature environment, and measurement result could be authentic and valid.Room temperature ring
The sample and standard test load displacement curve figure of tri- kinds of sizes of border lower leaf sector width 4mm, 5mm and 6mm respectively referring to Fig. 8,
Shown in Fig. 9, Figure 10.
Referring to Fig. 8, for the code test of delamination area width 4mm, breaking load 300.0N, delamination area width
The cross structure breaking load of 4mm is respectively 309.1N, 336.5N, 287.9N, average value 311.2N, it is contemplated that ceramic base
Composite material has certain dispersibility, and the test result of code test is distributed between cross structure test result,
Therefore the cross structure of room temperature environment lower leaf peak width 4mm can replace code test.
Referring to Fig. 9, for the code test of delamination area width 5mm, breaking load 483.3N, delamination area width
The cross structure breaking load of 5mm is respectively 519.0N, 450.2N, 520.1N, average value 507.3N, it is contemplated that ceramic base
Composite material has certain dispersibility, and the test result of code test is distributed between cross structure test result,
Therefore the cross structure of room temperature environment lower leaf peak width 5mm can replace code test.
Referring to Figure 10, for the code test of delamination area width 6mm, breaking load 712.7N, demixing zone field width
The cross structure breaking load for spending 6mm is respectively 620.0N, 647.9N, 769.1N, average value 679.0N, it is contemplated that ceramics
Based composites have certain dispersibility, and the test result of code test be distributed in cross structure test result it
Between, therefore the cross structure of room temperature environment lower leaf peak width 6mm can replace code test.
As can be seen from the comparison result, the face out-draw that cross structure and standard test are measured under room temperature environment, which destroys, to be carried
Lotus is close, and the test result of code test is distributed between cross structure test result, therefore can carry out high temperature examination
It tests.
Hot environment testing experiment equipment is that Instron-8801 type electo hydraulic servocontrolled fatigue testing machine is tested with vacuum high-temperature
System, test temperature are 1200 DEG C, and test environment is vacuum (vacuum degree 10-3Pa).Loading speed is 0.5mm/min.Figure 11
Show typical load-displacement curves.
Step 7: according to formulaCalculating face out-draw intensity,
Wherein, σ is face out-draw intensity, FmaxFor maximal destruction load, b is that sample is layered sector width；
The test is repeated 3 times, and the face out-draw intensity of test is respectively: 19.06MPa, 20.0MPa, 21.0MPa, therefore
It can be seen that the centre plane out-draw intensity of the material is 19.83MPa.Standard deviation is 0.58MPa, coefficient of dispersion 2.9%.Figure 12 is aobvious
The photo after face out-draw destroys is shown.Sample is in typical cross directional stretch failure mode.The above results illustrate the test method
Effectively and precision is high.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (5)
1. a kind of test sample of Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity, it is characterised in that: the examination
Sample is plate structure, with a thickness of 4~10mm, is divided into X plate and Y plate；The X plate and Y plate are mutually perpendicular to and intersect at center, are in ten
Word structure；Sample center intersection is the cube structure of 3~10mm of width；The cube structure is located at the examination
The first notch being parallel to each other is provided on the outside of two relative edges of sample X plate upper surface, first cuts parallel is in the Y
Plate；The cube structure, which is located on the outside of two relative edges of the sample Y plate lower surface, is provided with second to be parallel to each other
Notch, second cuts parallel is in the X plate；First notch and the second notch it is of same size, and be 0.1~
1mm, length are equal to the width of the cube structure, and depth is equal to the half of sample thickness, first notch and
The bottom surface of two incisions is in same plane；Be formed in parallel on the sample in the X plate and Y plate center intersection of the sample,
The demixing zone of lower surface, the demixing zone be with first notch, the second notch bottom surface in conplane square,
It is 3~10mm that width is of same size with the cube structure.
2. a kind of frock clamp of test sample described in test claim 1, it is characterised in that: the frock clamp includes upper folder
Tool and lower fixture；The lower fixture is block structure, and surface is provided with cross recess corresponding with the sample on it；Institute
It states sample and the cross recess is clearance fit, and can be along the side perpendicular to cross recess bottom surface in the cross recess
To movement；The cross recess is divided into groove a ' b ' and groove e two parts, and the depth of the groove a ' b ' is greater than the sample
Thickness, for the positioning of the sample, the depth of the groove e is greater than the depth of the groove a ' b '；When the test specimen is installed
In the partial compression deformation of the groove e, can continue mobile to the bottom the groove e；The groove e with it is described recessed
The depth difference of slot a ' b ' is greater than the thickness of the test specimen, can be broken for the demixing zone of the sample and provide space；
The upper fixture is plate structure, and bottom width is equal to the X plate of the sample or the width of Y plate, the length of bottom surface
Greater than the X plate of the sample or the length of Y plate, and with the groove e clearance fit, can be along perpendicular to cross recess bottom surface
Direction is mobile；The upper fixture bottom surface is provided with the groove c ' d ' matched with the X plate of the sample or Y plate, for positioning
State the part that sample is placed in the groove e；Fluted f is set among the groove bottom of the groove c ' d ', the groove f's
Depth is greater than the thickness of the sample, can be broken for the demixing zone of the sample and provide space；The upper fixture upper surface is
Convex arc structure allows what mechanics machine was applied to that the load of upper fixture is uniformly applied to the sample to move down end.
3. a kind of carry out continuous fiber reinforcement pottery using frock clamp described in test sample and claim 2 described in claim 1
The test method of porcelain based composites face out-draw intensity, it is characterised in that specific step is as follows:
Step 1: the Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw strength specimen is accurately processed；
Step 2: the frock clamp of design processing and sample cooperation；
Step 3: the sample is installed in the frock clamp；
Sample notch Y plate directed downwardly is mounted in the groove a ' b ' of the lower fixture, the X plate of the sample notch upward
It is mounted in the groove e of the lower fixture；By the upper fixture bottom surface towards the lower fixture, the groove c ' d ' of the upper fixture
It is fitted to the X plate of the sample in the groove e of the lower fixture；
Step 4: the mounted sample and frock clamp are placed on testing machine for mechanical properties, and test parameters is arranged；
Step 5: out-draw dullness load in face is applied to the upper fixture of the frock clamp, i.e., the convex arc of the upper fixture is made
It is firmly F, so that the active force for moving down end c, d and being respectively subjected to 1/2F of the X plate of the sample, can make moving down for the sample
Hold uniform force；Face out-draw dullness load is applied up to the destruction of the demixing zone of the sample, i.e., the described sample to the sample
Uniformly tearing；Load-displacement curves are recorded simultaneously；
Step 6: test stops, and takes out the sample；
Step 7: according to formulaCalculating face out-draw intensity,
Wherein, σ is face out-draw intensity, FmaxFor maximal destruction load, b is that sample is layered sector width；
It carries out repeating to test three times, takes the average value of face out-draw intensity three times.
4. the test method of Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity according to claim 3, special
Sign is: the Range of measuring temp of the test method is room temperature to 2200 DEG C.
5. the test method of Continuous Fiber Reinforced Ceramic Matrix Composites face out-draw intensity according to claim 3, special
Sign is: the test environment of the test method is atmospheric environment, vacuum environment, inert ambient environment or other corrosivity rings
Border.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811365625.2A CN109507027B (en) | 2018-11-16 | 2018-11-16 | Test sample, clamp and method for out-of-plane tensile strength of continuous fiber reinforced ceramic matrix composite |
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| CN201811365625.2A CN109507027B (en) | 2018-11-16 | 2018-11-16 | Test sample, clamp and method for out-of-plane tensile strength of continuous fiber reinforced ceramic matrix composite |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN116384163A (en) * | 2023-06-05 | 2023-07-04 | 中国航发四川燃气涡轮研究院 | Design method of ceramic matrix composite complex component for aero-engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113334271A (en) * | 2021-05-25 | 2021-09-03 | 中国科学院上海硅酸盐研究所 | Frock clamp is used in preparation of single bundle of fiber reinforcement ceramic matrix composite |
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| CN113702137A (en) * | 2021-09-17 | 2021-11-26 | 信利光电股份有限公司 | Clamp and method for manufacturing hot melt adhesive vertical drawing strength test sample |
| CN116384163A (en) * | 2023-06-05 | 2023-07-04 | 中国航发四川燃气涡轮研究院 | Design method of ceramic matrix composite complex component for aero-engine |
| CN116384163B (en) * | 2023-06-05 | 2023-09-05 | 中国航发四川燃气涡轮研究院 | Design method of ceramic matrix composite complex component for aero-engine |
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