CN110186748A - A kind of test device and test method of lamellar composite plate shear strength - Google Patents
A kind of test device and test method of lamellar composite plate shear strength Download PDFInfo
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- CN110186748A CN110186748A CN201910426985.7A CN201910426985A CN110186748A CN 110186748 A CN110186748 A CN 110186748A CN 201910426985 A CN201910426985 A CN 201910426985A CN 110186748 A CN110186748 A CN 110186748A
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- 238000012360 testing method Methods 0.000 title claims abstract description 58
- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 238000010998 test method Methods 0.000 title description 11
- 210000004907 gland Anatomy 0.000 claims abstract description 38
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000010008 shearing Methods 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 1
- 239000002905 metal composite material Substances 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses the test device and method of a kind of laminar composite shear strength, described device includes: upper die and lower die, gland, formed punch carrier, formed punch, positioning pin, fastening spring, gasket, fastening bolt.Formed punch carrier, formed punch and gland are Elliptic Cylinder, and formed punch carrier, formed punch and gland are opened in identical position there are two bolt hole, and two dowel holes, it is fixed by the alignment of positioning pin, bolt and fastening spring, formed punch carrier, formed punch and gland group are combined into punch die, wherein sample is placed between formed punch and gland, and punch edge is cutting edge.The present invention is compared with the device of existing lamellar composite plate shear strength, have the advantage that sample preparation is simple, the thickness of sample is applied widely, the shear strength of different-thickness can accurately be measured, the assembling of mold is more convenient, simultaneously because eliminating pedestal, cost and material have been saved.
Description
Technical field
The invention belongs to lamellar composite plate mechanical property technical fields, i.e., strong suitable for the shearing of double-level-metal composite plate
Degree test is suitable for three layers even shear strength of multi-layer metal composite plate again.
Background technique
Measure laminated composite plate quality index it is very much, common index have shear strength, adhesion strength, bending,
Peel strength etc., these indexs can effectively reflect the interface quality of laminated composite plate.Wherein, shear strength can have
Effect illustrates the interface bond strength height of laminated composite plate, while being also convenient for measuring, therefore, using relatively broad.
Shear strength is calculated by formula (1):
In formula: τ is shear strength (MPa)；F is shearing force (N)；S is the section of shear (mm2), it is referred in this right
Total section of shear of two samples.
But the stratiform according to specified in GB/T 6396-2008 " clad steel plate mechanics and technological property test method "
The test method and test device of clad steel plate shear strength, the laminated composite plate to thickness greater than 10mm can be using compression shear
Mode is tested, and can be tested in such a way that drawing is cut the laminated composite plate less than or equal to 10mm.Equally, ASTM
264 " Standard Specification for Stainless Chromium-Nickel Steel-Clad Plate " with
And shearing strength test method and survey specified in YS/T485-2005 " test method of sintering bimetallic shear strength "
Trial assembly is set, identical as the test method of GB/T6396-2008 and test device.However, both shearing strength test methods and
Test device all has some limitations, and the test mode of compression shear is generally only suitable for the relatively thick situation of substrate, if
Substrate than it is relatively thin when, under pressure, substrate will occur bending and deformation, and influence measuring accuracy, or even cannot measure completely
Shearing strength value, and the preparation of test sample is more troublesome.Therefore, when compound plate thickness is thinner, (regulation is less than in standard
Equal to 10mm) when need to using draw cut by the way of be tested, but it is relatively thick to draw the test mode cut also to be only suitable for coating
Situation, when coating thickness is thinner, it is easy to constriction and fracture occur in the most weak position of coating, shape rings measuring accuracy, very
To test crash is made, the preparation process of the drawing sample cutting product of same relatively thin composite board is more difficult and cumbersome, meanwhile, it is either thick
Composite board or thin composite board not can avoid micro-crack in the generation of interface according to the preparation of national standard, be based on this
A little disadvantages, many people propose different improvement projects, wherein there is patent (102654440 A of CN) to point out, sample is prepared into
For strip, materials A is clamped by mold a part, another part clamps material B, but the patent is not considered in shear history
The bending of part or compression or the loosening of sample, which may occur, for middle sample leads to the inaccurate of measurement, simultaneously because its punch die
Fixed thread in the centre of formed punch so that the length limited of sample, therefore, it is necessary to develop out it is a kind of be applicable not only to it is relatively thin
Composite plate, but also it is suitable for thicker composite plate, while the preparation of sample also convenient and efficient and must can be avoided micro-crack
Influence to shear strength, while again can be with the device of the composite quality of accurate evaluation laminated composite plate.
Summary of the invention
(1) technical problems to be solved
The technical problem to be solved by the present invention is all had some limitations for above two shearing strength device,
The purpose of the present invention is based on common universal testing machine provide a kind of structure is simple, production is low with maintenance cost, pressure orientation,
The device of different-thickness lamellar composite plate shear strength can be realized very well.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of test device of lamellar composite plate shear strength, packets
It includes:
The present invention provides a kind of test devices of lamellar composite plate shear strength, comprising: upper die and lower die, gland, punching
Head carrier, formed punch, the formed punch and gland group be combined into punch die, be placed between the die body that upper die and lower die are composed, formed punch with
Sample to be processed is set between gland, and one end of the formed punch is provided with formed punch carrier, the other end and sample contacts, the punching
Head and gland are arranged between upper die and lower die by punch die fastening bolt, and the punch die fastening bolt is in one end close to gland
It is provided with the fastening spring being in contact with the gland；The lower die is fixed on the bottom of universal testing machine, utilizes universal test
Compressing head applies pressure above formed punch load, moves down punch die at a predetermined rate, so that sample is in formed punch carrier under
By the effect of shearing force between mould, to test shearing strength value.
The present invention also provides a kind of test methods of lamellar composite plate shear strength, include the following steps:
A. prepare sample to be tested first；
B. sample is clamped, the identical sample of two pieces of thickness is taken, symmetrically specimen holder is placed between gland and formed punch, is clamped
The first side that composite metal plate sample to be measured need to be clamped when sample makes compound boundary line and the side surface of formed punch carrier be in same flat
In face, it is combined into punch die；
C. mould is organized, lower die is fixed on to the bottom of universal testing machine using bolt, punch die is inserted into the aperture of lower die, from
Formed punch upper carrier is inserted in upper mold, is aligned upper mold with lower die using the positioning pin in lower die, clamps after upper die and lower die overlapping
Then second side of composite metal plate sample to be measured locks upper die and lower die using die body fastening bolt, is combined into die body；
D. shearing test applies pressure above formed punch carrier using universal test compressing head after punch die, die body combination,
Move down punch die at a predetermined rate, sample, by the effect of shearing force, is up to being cut between formed punch and lower die
Only；
E. data calculate, and the maximum value generated in reading shear history is as shearing force, the face sheared divided by sample
Product, the data obtained is the shearing strength value of composite plate.
(3) beneficial effect
Above-mentioned technical proposal has the advantages that the present invention provides a kind of tests of lamellar composite plate shearing strength to fill
It sets, using the device, spring can make sample in clamped condition always, because during shearing, formed punch clamping part
The sample divided can be compressed, and be in relaxed state so as to cause formed punch retained part, caused the inaccuracy of test result.Spring
Effect be to spring back during shearing, sample can be kept in clamped condition always, sheared to reduce
Lead to the inaccurate probability of measurement since the bending of part or compression or the loosening of sample may occur for sample in journey.By
It is not all straight line in the compound boundary line of two metals, so can accurately test out difference by replacing various sizes of formed punch and cover
The shearing strength value of the layer metal composite plate material of thickness degree.
Present invention substantive distinguishing features outstanding and significant progress are mainly reflected in:
1. it is wider that the present apparatus can accurately test out range compared with existing composite metal plate shearing strength test device
The shearing strength of the composite metal plate of coating thickness, meanwhile, when sample is with a thickness of " the clad steel plate mechanics of GB/T6396-2008
And technological property test method " in cut using compression shear and drawing in the way of metal of the composite plate overall thickness less than 4~5mm that cannot test
When laminated composite plate, different formed punches is replaced by observing the thickness of composite layer, and then realize cutting for different-thickness composite plate
The test of shearing stress.
2. sample needed for this method and device is simple, easy compared with existing composite metal plate shearing strength test device
It is convenient for the polishing of sample in the preparation process of sample, this allows for specimen surface simultaneously because sample is strip in processing
Crackle quantity reduce, by the mechanics of materials it is found that the crackle of specimen surface can be generated in sample stress stress concentrate cause
Crack propagation is so that the more actual numerical value of data of test is low, therefore passes through the polishing of sample so that splitting for specimen surface
Line quantity reduces so as to avoid crizzle during the test to the influence of measuring accuracy.
Detailed description of the invention
Fig. 1 is layer metal composite plate shearing strength test device main view.
Fig. 2 is layer metal composite plate shearing strength test device top view.
Fig. 3 is layer metal composite plate shearing strength test device left view.
Fig. 4 is the punch die of layer metal composite plate shearing strength test device.
Fig. 5 a, b, c are the formed punches of layer metal composite plate shearing strength test device.
In figure: 1- punch die fastening bolt, 2- formed punch carrier, 3- die body fastening bolt, 4- upper mold, 5- formed punch, 6- sample, 7-
Gland, 8- lower die, 9- fastening spring, 10- gasket, 11- punch die fastening nut, 12- positioning pin, 13- lower die fastening bolt holes.
Specific embodiment
With embodiment, the invention will be further described with reference to the accompanying drawing:
As shown in Figs. 1-5, layer metal composite plate shearing strength test device includes: punch die fastening bolt 1, formed punch carrier
2, die body fastening bolt 3, upper mold 4, formed punch 5, sample 6, gland 7, lower die 8, fastening spring 9, gasket 10, punch die fastening nut
11, positioning pin 12, lower die fastening bolt holes 13.
There are two bolts hole, gland 7 to be placed in the lower section of formed punch 5, two bolts hole are processed on formed punch 5 for band on gland 7, presses
By two positioning pin alignment between lid 7, formed punch 5 and formed punch carrier 2, composite metal plate to be measured is folded up between gland 7 and formed punch 5
The coating side of sample is locked between gland 7, formed punch 5 and formed punch carrier 2 using punch die fastening bolt 1 and punch die fastening nut 11,
It is combined into punch die；The punch die fastening bolt 1 is provided with the fastening spring being in contact with the gland in one end close to gland.
Lower die 8 is fixed on to the bottom of universal testing machine using bolt across lower die fastening bolt holes 13, by the hole of punch die insertion lower die
In mouthful, it is inserted in upper mold 4 from formed punch upper carrier, is aligned upper mold with lower die using the positioning pin 12 in lower die, upper die and lower die
The matrix side that the composite metal plate sample to be measured of gland and the clamping of formed punch carrier is clamped after overlapping, then uses die body fastening bolt
3 locking upper die and lower die, are combined into die body.
Fastening spring 9 of the invention is equipped with gasket 10, gland 7, formed punch 5 and formed punch carrier in one end far from the gland
It is locked between 2 using punch die fastening bolt 1 and punch die fastening nut 11, spring can make sample in clamped condition always,
Because the sample of formed punch retained part can be compressed during shearing, relaxation shape is in so as to cause formed punch retained part
State causes the inaccuracy of test result.The effect of spring is to spring back during shearing, can keep at sample always
In clamped condition, to reduce in shear history since bending or compression or the sample of part may occur for sample
Loosen the inaccurate probability for leading to measurement.
The formed punch carrier 2 of the invention, formed punch 5 open that there are two spiral shells for fixing with gland 7 in corresponding position
Keyhole is locked using punch die fastening bolt 1 between gland 7, formed punch 5 and formed punch carrier 2, is combined into punch die.
The formed punch 5 and gland 7 of the invention is Elliptic Cylinder, and punch edge is cutting edge.
Oval post holes identical with punch die profile is provided among upper mold 4 of the invention and lower die 8, upper mold is with lower die also in phase
With position open there are four bolt hole, open that there are two location holes between upper and lower mould, be aligned by positioning pin.
Sample of the invention forms for two or more metallic combination, such as Al, Mg or other multilayers gold
Belong to.Faying face between metal layer is non-linear shapes.Since the compound boundary line of two metals is not all straight line, so passing through replacement
Various sizes of formed punch can accurately test out the shearing strength value of the layer metal composite plate material of different coating thicknesses.
As shown in Fig. 5 a, b, c, formed punch of the present invention is divided into three kinds of sizes, and the formed punch is detachably connected with formed punch carrier 2.
The part dimension and test method of layer metal composite plate shearing strength test device provided by the invention are as follows:
A. prepare sample to be tested first, using wire cutting machine from the Al/Mg that overall thickness is 4.0mm, coating thickness is 1.5mm
The sample to be tested for being 4.0mm with a thickness of 2.0mm, length 30mm, width is cut in composite plate along end face, sample is pasted onto flat
On plate, the cutting trace of specimen surface is polished using waterproof abrasive paper, every face grinds off 0.2mm, when surface smoothness Ra < 3.2, sample
Residual thickness is 1.6mm, length and width is constant, using picric acid solution etch specimen surface, exposes compound boundary line；
B. sample is clamped, the identical sample of two pieces of thickness is taken, symmetrically specimen holder is placed between gland and formed punch.Clamping
The side Al that composite metal plate sample to be measured need to be clamped when sample makes compound boundary line and the side surface of formed punch carrier be in same plane
It is interior, by two positioning pin alignment between gland, formed punch and formed punch carrier, is locked using punch die fastening bolt, be combined into punch die；
C. mould is organized, lower die is fixed on to the bottom of universal testing machine using bolt, punch die is inserted into the aperture of lower die, from
Formed punch upper carrier is inserted in upper mold, is aligned upper mold with lower die using the positioning pin in lower die, clamps after upper die and lower die overlapping
Then the side Mg of composite metal plate sample to be measured locks upper die and lower die using die body fastening bolt, is combined into die body.
D. shearing test applies pressure above formed punch carrier using universal test compressing head after punch die, die body combination,
Move down punch die with the speed of 2mm/min, sample between formed punch carrier and lower die by the effect of shearing force, until quilt
Until cutting；
E. data calculate, and the maximum value generated in reading shear history is as shearing force, the face sheared divided by sample
Product, the data obtained is the shearing strength value of Al/Mg composite plate.
Finally, it should be noted that be not intended to restrict the invention the foregoing is merely embodiments of the present invention are illustrated, it is right
For those skilled in the art, all within the spirits and principles of the present invention, made any modification, changes equivalent replacement
Into etc., it should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of test device of lamellar composite plate shear strength characterized by comprising upper mold (4), lower die (8), gland
(7), formed punch carrier (2), formed punch (5), the formed punch (5) and gland (7) group are combined into punch die, are placed in upper mold (4) and lower die (8) group
Sample to be processed is set between die body made of conjunction, between formed punch and gland, and one end of the formed punch is provided with formed punch carrier
(2), the other end and sample contacts, the formed punch (5) and gland (7) by punch die fastening bolt (1) be arranged upper mold (4) and under
Between mould (8), the punch die fastening bolt (1) is provided with the fastening spring being in contact with the gland in one end close to gland
(9)；The lower die is fixed on the bottom of universal testing machine, applies pressure above formed punch load using universal test compressing head, makes
Punch die moves down at a predetermined rate so that sample between formed punch and lower die by the effect of shearing force, to test shearing resistance
Intensity value.
2. a kind of test device of lamellar composite plate shear strength according to claim 1, which is characterized in that described tight
Gu spring (9) is equipped with gasket in one end far from the gland.
3. a kind of test device of lamellar composite plate shear strength according to claim 1, which is characterized in that the punching
Head carrier, formed punch and gland open that there are two bolts hole for fixing in corresponding position.
4. a kind of test device of lamellar composite plate shear strength according to claim 1, which is characterized in that the punching
Head (5) and gland are Elliptic Cylinder, and punch edge is cutting edge.
5. a kind of test device of lamellar composite plate shear strength according to claim 1, which is characterized in that upper mold with
Oval post holes identical with punch die profile is provided among lower die, upper mold and lower die are also opened in identical position there are four bolt hole,
Location hole there are two opening between upper and lower mould, is aligned by positioning pin.
6. a kind of test device of lamellar composite plate shear strength according to claim 1, which is characterized in that the examination
Sample is that two or more metallic combination forms, and the faying face between metal layer is non-linear shapes.
7. a kind of test device of lamellar composite plate shear strength according to claim 1, which is characterized in that the punching
Head is divided into three kinds of sizes, and the formed punch is detachably connected with formed punch carrier (2).
8. a kind of test side using the test device of lamellar composite plate shear strength described in claim 1-7 any one
Method, which comprises the steps of:
A. prepare sample to be tested first；
B. sample is clamped, the identical sample of two pieces of thickness is taken, symmetrically specimen holder is placed between gland and formed punch, clamps sample
When need to clamp the first side of composite metal plate sample to be measured, so that compound boundary line and the side surface of formed punch carrier is in same plane
It is interior, it is combined into punch die；
C. mould is organized, lower die is fixed on to the bottom of universal testing machine using bolt, punch die is inserted into the aperture of lower die, from formed punch
Upper carrier is inserted in upper mold, is aligned upper mold with lower die using the positioning pin in lower die, clamps sample after upper die and lower die overlapping
Second side, then using die body fastening bolt lock upper die and lower die, be combined into die body；
D. shearing test applies pressure above formed punch carrier using universal test compressing head, makes to rush after punch die, die body combination
Mould moves down at a predetermined rate, sample between formed punch and lower die by the effect of shearing force, until by until cutting；
E. data calculate, and the maximum value generated in reading shear history is as shearing force, the area sheared divided by sample, institute
Obtain the shearing strength value that data are composite plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426985.7A CN110186748A (en) | 2019-05-22 | 2019-05-22 | A kind of test device and test method of lamellar composite plate shear strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426985.7A CN110186748A (en) | 2019-05-22 | 2019-05-22 | A kind of test device and test method of lamellar composite plate shear strength |
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| CN110186748A true CN110186748A (en) | 2019-08-30 |
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| US20080092711A1 (en) * | 2006-10-19 | 2008-04-24 | Mate Precision Tooling, Inc. | Multiple punch and die assembly providing hand disassembly, punch length adjustment and replacement |
| US20110107888A1 (en) * | 2009-11-10 | 2011-05-12 | Bruce Thielges | Multiple Punch and Die Assembly |
| CN202002855U (en) * | 2011-03-01 | 2011-10-05 | 辽宁科技大学 | Shearing strength testing device for bimetal composite plate |
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