CN112098192A - Clamp and method for testing tensile shear creep of adhesive by cross method - Google Patents
Clamp and method for testing tensile shear creep of adhesive by cross method Download PDFInfo
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- CN112098192A CN112098192A CN202011129550.5A CN202011129550A CN112098192A CN 112098192 A CN112098192 A CN 112098192A CN 202011129550 A CN202011129550 A CN 202011129550A CN 112098192 A CN112098192 A CN 112098192A
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- 238000012360 testing method Methods 0.000 title claims abstract description 66
- 239000000853 adhesive Substances 0.000 title claims abstract description 64
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims description 32
- 239000000758 substrate Substances 0.000 claims description 20
- 238000005452 bending Methods 0.000 claims description 11
- 239000012790 adhesive layer Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims 1
- 238000010008 shearing Methods 0.000 abstract 2
- 238000010998 test method Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
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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
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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 invention discloses a clamp and a method for testing tensile shear creep of an adhesive by a cross method, and belongs to the field of adhesive shear creep testing. The invention uses a U-shaped first clamping plate with two J-shaped hook grooves at one end and a rectangular second clamping plate with one J-shaped hook groove at one end to form a clamp, and a cross sample is effectively fixed in the clamp. The invention can fix the cross sample, utilize the tensile load to carry out the shearing creep test, eliminate the rotation generated by the test piece pulled by the bonding layer, thereby more accurately measuring the shearing creep property of the adhesive, being applicable to the test pieces with different bonding layer thicknesses, needing no preparation of clamps with different specifications, reducing the test cost and improving the test efficiency.
Description
Technical Field
The invention relates to the field of adhesive shear creep testing, in particular to a clamp and a method for testing adhesive tensile shear creep by a cross method.
Background
The adhesive is widely applied to connection of various materials and components. As the adhesive has long service time and is continuously stressed, the adhesive inevitably generates creep deformation. Therefore, it is necessary to perform test characterization of the creep performance of the adhesive. A test method for tensile shear creep performance of an adhesive (metal-to-metal) is disclosed in the current Chinese national standard GB/T7750-1987 test method for tensile shear creep performance of the adhesive, and a test sample is shown in FIG. 1. The method is only suitable for the condition that the bonding layer is thin, and for the adhesive with a certain thickness when the silicone weather-resistant adhesive, the silicone structural sealant and the like are used, the shear creep property of the adhesive cannot be accurately measured by the method. On the other hand, the method needs to punch a connecting hole on the test piece, is only suitable for metal material test pieces, and for brittle materials such as ceramics, glass and the like, the punching easily causes the damage of the test piece, causes unnecessary waste and reduces the test efficiency.
Chinese patent document CN1512161A discloses a method for testing shear strength of solid material bonding interface, which can perform shear creep test of material by compressive load, as shown in fig. 2. Two strip-shaped base materials are adhered into a vertical cross test piece by using a tested adhesive, a horizontal base material is placed on a support piece during testing, the upper part of the vertical base material is vertically pressed down to bear load, and the lower part of the vertical base material can be connected with a displacement sensor (such as a dial indicator) to collect creep displacement. However, the test method has the following disadvantages: because the supporting force and the pressing load are not on the same line, the tested piece tends to rotate towards the vertical base material direction, so that errors are caused, and the phenomenon is more obvious when the bonding layer is thick. On the other hand, this method can only perform a test by a pressing load, and cannot perform a shear creep test by a tensile load.
Disclosure of Invention
In order to solve the technical problems, the invention provides the clamp and the method for testing the tensile shear creep of the adhesive by the cross method.
The technical scheme provided by the invention is as follows:
a fixture for cross-hatch testing of adhesive tensile shear creep, the fixture comprising a first holding plate and a second holding plate, wherein:
the first clamping plate comprises a first connecting part, a first connecting structure used for being connected with a tension instrument is arranged on the first connecting part, two rectangular first clamping parts which are parallel to each other and are spaced at a certain distance are fixedly arranged on the first connecting part, the first connecting part and the two first clamping parts form a U-shaped structure, and a first J-shaped hook groove used for clamping a transverse base material in a cross sample is arranged at the tail end of each first clamping part;
the shape of second grip block is the rectangle, the one end of second grip block is the second connecting portion, be provided with the second connection structure who is used for being connected with the tensile instrument on the second connecting portion, the other end of second grip block is the second clamping part, the end of second clamping part is provided with the second J type hook groove that is arranged in the vertical substrate of centre gripping cross sample.
Furthermore, the second connecting part is bent for a certain distance relative to the second clamping part towards one side where the second J-shaped hook groove is located.
Furthermore, a first threaded hole is formed in the position, located at the first J-shaped hook groove, of the tail end of the first clamping portion, a second threaded hole is formed in the position, located at the second J-shaped hook groove, of the tail end of the second clamping portion, and the first threaded hole and the second threaded hole are both provided with screws.
Furthermore, the first connecting structure is a first pin hole formed in the first connecting portion, and the second connecting structure is a second pin hole formed in the second connecting portion.
Furthermore, the first connecting part and the two first clamping parts are of an integral structure.
Further, the length of the first connecting portion is 24mm, the width of the first connecting portion is 70mm, the height of the first connecting portion is 3.5mm, the diameter of the first pin hole is 7.5mm, the center of the first pin hole is located on the central line of the first clamping plate in the width direction, and the distance between the center of the first pin hole and the long side of the outer side of the first connecting portion is 8.75 mm;
the length of the first clamping parts is 96mm, the width of the first clamping parts is 24mm, the height of the first clamping parts is 2mm, the length of a groove space formed by the first J-shaped hook grooves is 15mm, the width of the groove space is 24mm, the height of the groove space is 4mm, the two first clamping parts are symmetrical about the center line of the first connecting part in the length direction, and the distance between the two first clamping parts is 22 mm;
the diameter of the first threaded hole is 3mm, the circle center of the first threaded hole is located on the center line of the first clamping portion in the width direction, and the distance between the circle center of the first threaded hole and the short side of the outer side of the first clamping portion is 5 mm.
Further, the length of the second connecting part is 57mm, the width of the second connecting part is 15mm, the height of the second connecting part is 3.5mm, the diameter of the second pin hole is 7.5mm, the center of the second pin hole is located on the width direction central line of the second connecting part, and the distance between the center of the second pin hole and the outer short side of the second connecting part is 8.75 mm;
the length of the second clamping part is 63mm, the width of the second clamping part is 15mm, the height of the second clamping part is 2mm, the length of a groove space formed by the second J-shaped hook groove is 10mm, the width of the groove space is 15mm, and the height of the groove space is 4 mm;
the second connecting part is bent by 90 degrees relative to the second clamping part to one side where the second J-shaped hook groove is located, the height of an inner side bending angle formed by bending is 6.5mm, and the height of an outer side bending angle formed by bending is 5 mm;
the diameter of the second threaded hole is 3mm, the circle center of the second threaded hole is located on the central line of the second clamping portion in the width direction, and the distance between the circle center of the second threaded hole and the short side of the outer side of the second clamping portion is 5 mm.
A method of using the aforementioned fixture for adhesive tensile shear creep testing, the method comprising:
s1: measuring the bonding interface area S of the adhesive in the cross sample and the length dimension X of the adhesive in the direction of tensile load;
s2: connecting the first connecting structure of the first clamping plate with the upper connecting mechanism of the tensile instrument, embedding the transverse base material in the cross sample into the first J-shaped hook groove, and enabling the adhesive layer in the cross sample to penetrate through a gap between the two first connecting parts;
s3: arranging a second clamping plate and the first clamping plate oppositely, embedding the vertical base material in the cross sample into a second J-shaped hook groove, and connecting a second connecting structure of the second clamping plate with a lower connecting mechanism of a tension instrument;
s4: starting the tension instrument to enable an upper connecting mechanism and a lower connecting mechanism of the tension instrument to be away from each other, and applying a tension load F to the cross sample;
s5: keeping the tensile load F for a period of time, recording the deformation quantity delta X (t) of the adhesive in the tensile direction along with the time, and calculating the tensile shear creep compliance J (t) of the adhesive by using the following formula
Further, the S2 further includes: screwing a screw in the first threaded hole to tightly press the transverse base material on the inner wall of the first J-shaped hook groove;
the S3 further includes: and screwing a screw in the second threaded hole to tightly press the vertical base material on the inner wall of the second J-shaped hook groove.
The invention has the following beneficial effects:
the invention uses the U-shaped first clamping plate with two J-shaped hook grooves at one end and the rectangular second clamping plate with one J-shaped hook groove at one end to form the clamp, so that the cross sample is effectively fixed in the clamp, the shear creep test can be carried out by using tensile load, the possibility of rotation of a test piece is avoided, and the error in the test process is reduced. In addition, the invention can clamp the cross-shaped samples made of different materials and with different adhesive layer thicknesses without manufacturing or replacing clamps with different specifications, thereby saving the test cost and improving the test efficiency.
Drawings
FIG. 1 is a schematic diagram of an adhesive tensile shear creep test specimen disclosed in the Chinese national standard GB/T7750-1987;
FIG. 2 is a schematic diagram of a cross shear strength test method disclosed in Chinese patent document CN 1512161A;
FIG. 3 is a schematic view of one embodiment of a first clamping plate of the fixture for criss-cross test of adhesive tensile shear creep of the present invention;
FIG. 4 is a schematic view of one embodiment of a second clamping plate of the fixture for criss-cross test of adhesive tensile shear creep of the present invention;
FIG. 5 is a schematic view of a cross sample;
FIG. 6 is a schematic view of another embodiment of a first clamping plate of the fixture for criss-cross test of adhesive tensile shear creep of the present invention;
FIG. 7 is a schematic view of another embodiment of a second clamping plate of the fixture for criss-cross test of adhesive tensile shear creep of the present invention;
FIG. 8 is a schematic view of the first clamping plate coupled to a tensile instrument;
FIG. 9 is a front view of an adhesive tensile shear creep test using the fixture of the present invention;
FIG. 10 is a perspective view of an adhesive tensile shear creep test using the fixture of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Example 1:
the embodiment of the invention provides a clamp for testing the tensile shear creep of an adhesive by a cross method, which is matched with an instrument capable of providing tension for use and used for clamping and fixing a cross sample when testing the tensile shear creep compliance of the adhesive.
As shown in fig. 5, the cross-shaped test sample 100 includes two bonded substrates and an adhesive, which are arranged in a cross shape, for convenience of description, the two bonded substrates are a horizontal substrate 200 and a vertical substrate 300, respectively, the horizontal substrate 200 and the vertical substrate 300 are vertically bonded by the adhesive 400, the horizontal substrate 200 and the vertical substrate 300 may have the same or different dimensions, and may have the same or different materials, and the materials may be rigid solids such as metal, ceramic, glass, plastic, wood, and the like.
As shown in fig. 3 and 4, the clamp includes a first clamping plate 1 and a second clamping plate 2, wherein:
the overall shape of the first clamping plate is a U-shaped plate with two J-shaped hook grooves at one end: the first clamping plate 1 comprises a first connecting portion 11, a first connecting structure 12 used for being connected with a tension instrument is arranged on the first connecting portion 11, two rectangular first clamping portions 13 which are parallel to each other and spaced at a certain distance are fixedly arranged on the first connecting portion 11, the first connecting portion 11 and the two first clamping portions 13 form a U-shaped structure, and a first J-shaped hook groove 14 used for clamping a transverse substrate 200 in a cross sample 100 is arranged at the tail end of each first clamping portion 13.
The overall shape of the second clamping plate is a rectangular plate with a J-shaped hook groove at one end: the shape of the second clamping plate 2 is rectangular, one end of the second clamping plate 2 is a second connecting portion 21, a second connecting structure 22 for connecting with a tension instrument is arranged on the second connecting portion 21, the other end of the second clamping plate 2 is a second clamping portion 23, and a second J-shaped hook groove 24 for clamping the vertical substrate 400 in the cross sample 100 is arranged at the tail end of the second clamping portion 23.
The using process of the invention is as follows:
the first attachment structure of the first clamping plate is attached to the upper attachment structure of the tensile machine as shown in fig. 8. The cross substrate in the cross sample was inserted into the first J-hook slot and the adhesive layer in the cross sample was allowed to pass through the gap between the two first connectors, as shown in fig. 9 and 10.
Then, the second clamping plate and the first clamping plate are arranged oppositely, the vertical base material in the cross sample is embedded in the second J-shaped hook groove, and the second connecting structure of the second clamping plate is connected with the lower connecting mechanism of the tension instrument, as shown in fig. 9 and 10.
And starting the tension instrument to enable the upper connecting mechanism and the lower connecting mechanism of the tension instrument to be away from each other, applying a tensile load to the cross sample, and recording the deformation of the adhesive in the tensile direction along with time.
And calculating the tensile-shear creep compliance of the adhesive according to the size, the applied load and the deformation of the adhesive.
The invention uses the U-shaped first clamping plate with two J-shaped hook grooves at one end and the rectangular second clamping plate with one J-shaped hook groove at one end to form the clamp, so that the cross sample is effectively fixed in the clamp, the shear creep test can be carried out by using tensile load, the possibility of rotation of a test piece is avoided, and the error in the test process is reduced. In addition, the invention can clamp the cross-shaped samples made of different materials and with different adhesive layer thicknesses without manufacturing or replacing clamps with different specifications, thereby saving the test cost and improving the test efficiency.
As a modification of the present invention, the second connecting portion 21 of the second clamping plate is bent at a certain distance to the side of the second J-shaped hook groove 24 with respect to the second clamping portion 22.
As shown in FIG. 4, the middle of the second clamping plate is provided with a section bent perpendicular to the length direction, which is suitable for the condition that the adhesive of the test piece is thick. The upper and lower connecting rods of the tension instrument such as a tension machine are generally positioned on a straight line in the vertical direction, and the return bending of the second clamping plate can correct the position deviation of two bonded substrates in the horizontal direction caused by the thickness of the adhesive layer, so that the two clamping plates can be conveniently and smoothly connected to the tension instrument.
As another modification of the present invention, as shown in fig. 6 and 7, a first threaded hole 15 is opened at a position of the end of the first clamping portion 13, which is located at the first J-shaped hook groove 14, a second threaded hole 25 is opened at a position of the end of the second clamping portion 23, which is located at the second J-shaped hook groove 24, and both the first threaded hole 15 and the second threaded hole 25 are provided with screws.
The J-shaped hook groove ends of the two clamping plates are provided with threaded holes which are matched with screws for use. Can be with the screw precession hook groove in, will be pressed on hook inslot wall by the bonding substrate, realize the fixed of not equidimension by bonding substrate test piece to improve and prevent the rotatory effect of test piece. On the other hand, even if the cross-shaped test sample is broken due to the damage of the bonding layer in the test process, the bonded base material is still pressed in the hook groove by the screw and cannot fall off, and the damage of the bonded base material is avoided.
In the present invention, the first connection portion and the second connection portion connected to the tensile machine may have various structures, such as a plate-like shape clamped on the tensile machine and screwed to the tensile machine, and preferably, the first connection portion 12 is a first pin hole opened on the first connection portion 11, and the second connection portion 22 is a second pin hole opened on the second connection portion 21.
As shown in fig. 3, 4, 6 and 7, the first connecting part and the second connecting part are thin plates, pin holes are formed in the thin plates, and the thickness and the size of the pin holes of the thin plates are matched with a tensile machine. The thin plate is inserted into the slit of the connecting rod of the tensile machine and fixed by the positioning pin 3 passing through the pin hole, as shown in fig. 8.
The size of the invention can be determined according to the sizes of the tested cross sample and the tensile machine for testing. The length, width and height directions are defined as the directions shown in fig. 3 for the sake of unifying the references of the respective directions, and the length, width and height directions of all the components in the present invention are identical to the length, width and height directions defined in fig. 3.
It should be ensured that: the first/second connecting part is matched with the tensile machine in size and can be tightly connected with the tensile machine; the length of the first clamping plate/the second clamping plate is enough to accommodate the tested cross sample and enough margin is reserved, so that the adhesive can be fully deformed in the test, and the second clamping plate is not contacted with the horizontal base material which is horizontally placed; the height of the first/second J-shaped hook groove is larger than the thickness of the bonded base material, so that the bonded base material can be smoothly placed into the first/second J-shaped hook groove; the gap between the two hook grooves of the first clamping plate is large enough to enable the adhesive layer to penetrate through without contacting with the first clamping plate so as to generate friction; the length of the first/second J-shaped hook groove is long enough to enable the bonded substrate to cling to the inner wall of the first/second J-shaped hook groove, and the bonded substrate has a certain contact area and does not rotate.
Preferably, the first connecting portion 11 of the first clamping plate and the two first clamping portions 13 are of an integral structure.
The first clamping plate is a rectangular thin plate with the length of 120mm and the width of 70mm, a rectangular through hole with the length of 96mm and the width of 22mm is formed in the middle of the first clamping plate, and the through hole is symmetrical about the central axis of the first clamping plate.
The length of the first connecting portion is 24mm, the width is 70mm, the height is 3.5mm, a first pin hole is formed in the middle, the diameter of the first pin hole is 7.5mm, the circle center of the first pin hole is located on the width direction central line of the first clamping plate, and the distance between the circle center of the first pin hole and the long edge of the outer side of the first connecting portion is 8.75 mm.
The length of first clamping part is 96mm, and the width is 24mm, highly is 2mm along the first clamping plate of two long edges respectively of a rectangle sheet metal, first clamping plate is buckled 90 twice in the end, forms first J type hook groove, and the length in the recess space that first J type hook groove formed is 15mm, and the width is 24mm, highly is 4mm, and two first clamping parts are symmetrical about the length direction central line of first connecting portion, and the interval of two first clamping parts is 22 mm.
A first threaded hole is formed in each of the two first clamping plates, the diameter of each first threaded hole is 3mm, the circle center of each first threaded hole is located on the central line of the first clamping portion in the width direction, and the distance between the circle center of each first threaded hole and the short edge of the outer side of each first clamping portion is 5 mm.
The second clamping plate is a rectangular thin plate with the length of 120mm and the width of 15mm, the length of the second connecting portion is 57mm, the width of the second connecting portion is 15mm, the height of the second connecting portion is 3.5mm, a second pin hole is formed in the middle of the second clamping plate, the diameter of the second pin hole is 7.5mm, the circle center of the second pin hole is located on the width direction central line of the second connecting portion, and the distance between the circle center of the second pin hole and the outer short side of the second connecting portion is 8.75 mm.
The length of second clamping part is 63mm, and the width is 15mm, and highly is 2mm, the second grip block is in terminal 90 degrees two times of buckling, forms second J type hook groove, and the length of the recess space that second J type hook groove formed is 10mm, and the width is 15mm, and the height is 4 mm.
The second connecting part is bent by 90 degrees relative to the second clamping part to one side where the second J-shaped hook groove is located, the height of an inner bent angle formed by bending (namely the height of the upper edge formed after the bent part is bent) is 6.5mm, the height of an outer bent angle formed by bending (namely the height of the lower edge formed after the bent part is bent) is 5mm, and the height of the second clamping part at the bent part is 2 mm.
A second threaded hole is formed in the second clamping plate, the diameter of the second threaded hole is 3mm, the circle center of the second threaded hole is located on the width direction center line of the second clamping portion, and the distance between the circle center of the second threaded hole and the outer side short edge of the second clamping portion is 5 mm.
Example 2:
the embodiment of the invention provides a method for testing tensile shear creep of an adhesive by using the clamp in the embodiment 1, which comprises the following steps:
s1: the bonding interface area S of the adhesive and the length dimension X of the adhesive in the direction of the tensile load in the criss-cross test piece were measured.
S is the bonding interface area of the bonded substrate and the adhesive, X is the length size of the adhesive in the direction to be subjected to tensile load, and S and X can be measured by a steel ruler or a vernier caliper.
S2: the first connecting structure of the first clamping plate is connected with the upper connecting mechanism of the tensile instrument, the transverse base material in the cross sample is embedded in the first J-shaped hook groove, and the adhesive layer in the cross sample penetrates through the gap between the two first connecting parts, as shown in fig. 9 and 10.
S3: the second clamping plate and the first clamping plate are arranged oppositely, the vertical base material in the cross sample is embedded in the second J-shaped hook groove, so that the cross sample is fixed, and the second connecting structure of the second clamping plate is connected with the lower connecting mechanism of the tension instrument, as shown in fig. 9 and 10.
S4: and starting the tension instrument to enable the upper connecting mechanism and the lower connecting mechanism of the tension instrument to be away from each other, and applying a tensile load F to the cross-shaped test sample.
The tension instrument is preferably a tension machine, and the upper connecting mechanism and the lower connecting mechanism of the tension instrument are connecting rods. Can set up the loading load through the computer, perhaps exert the weight loading, make tensile machine upper and lower connecting rod keep away from each other in vertical direction to produce tensile load F on the test piece, cause the shear deformation of adhesive linkage.
S5: keeping the tensile load F for a period of time, recording the deformation quantity delta X (t) of the adhesive in the tensile direction along with the time, and calculating the tensile shear creep compliance J (t) of the adhesive by using the following formula
In the above formula:
j (t) is the shear creep compliance of the adhesive in MPa-1；
X is the length size of the adhesive in the stretching direction and the unit is mm;
Δ x (t) is the amount of deformation of the adhesive in the direction of stretching, in mm;
f is a vertical load applied to the test piece by a tensile machine, and the unit is N;
s is the area of the bonding interface of the bonded substrate and the adhesive, and the unit is mm2。
If the first/second clamping plate is provided with the first/second threaded holes and screws, S2 further includes: and screwing a screw in the first threaded hole to press the transverse base material on the inner wall of the first J-shaped hook groove so as to adapt to samples with different sizes.
Likewise, S3 further includes: and screwing a screw in the second threaded hole to tightly press the vertical base material on the inner wall of the second J-shaped hook groove so as to adapt to samples of different sizes.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A fixture for cross-hatch testing of adhesive tensile shear creep, said fixture comprising a first holding plate and a second holding plate, wherein:
the first clamping plate comprises a first connecting part, a first connecting structure used for being connected with a tension instrument is arranged on the first connecting part, two rectangular first clamping parts which are parallel to each other and are spaced at a certain distance are fixedly arranged on the first connecting part, the first connecting part and the two first clamping parts form a U-shaped structure, and a first J-shaped hook groove used for clamping a transverse base material in a cross sample is arranged at the tail end of each first clamping part;
the shape of second grip block is the rectangle, the one end of second grip block is the second connecting portion, be provided with the second connection structure who is used for being connected with the tensile instrument on the second connecting portion, the other end of second grip block is the second clamping part, the end of second clamping part is provided with the second J type hook groove that is arranged in the vertical substrate of centre gripping cross sample.
2. The fixture for criss-cross test of adhesive tensile shear creep of claim 1, wherein the second connecting portion is bent a distance to a side of the second J-hook slot with respect to the second clamping portion.
3. The clamp for testing tensile shear creep of an adhesive according to claim 2, wherein the first clamping portion has a first threaded hole at a position where the first J-shaped hook groove is located at a terminal end thereof, the second clamping portion has a second threaded hole at a position where the second J-shaped hook groove is located at a terminal end thereof, and the first threaded hole and the second threaded hole are both provided with screws.
4. The fixture for criss-cross test of adhesive tensile shear creep according to claim 3, wherein the first connecting structure is a first pin hole formed in the first connecting portion and the second connecting structure is a second pin hole formed in the second connecting portion.
5. The fixture for criss-cross test of adhesive tensile shear creep according to claim 4, wherein the first connecting portion is of unitary construction with the two first clamping portions.
6. The fixture for cross-over test of tensile shear creep of an adhesive according to claim 5, wherein the first connecting portion has a length of 24mm, a width of 70mm and a height of 3.5mm, the first pin hole has a diameter of 7.5mm, the center of the first pin hole is located on the width-direction center line of the first clamping plate, and the distance between the center of the first pin hole and the outer long side of the first connecting portion is 8.75 mm;
the length of the first clamping parts is 96mm, the width of the first clamping parts is 24mm, the height of the first clamping parts is 2mm, the length of a groove space formed by the first J-shaped hook grooves is 15mm, the width of the groove space is 24mm, the height of the groove space is 4mm, the two first clamping parts are symmetrical about the center line of the first connecting part in the length direction, and the distance between the two first clamping parts is 22 mm;
the diameter of the first threaded hole is 3mm, the circle center of the first threaded hole is located on the center line of the first clamping portion in the width direction, and the distance between the circle center of the first threaded hole and the short side of the outer side of the first clamping portion is 5 mm.
7. The fixture for criss-cross test of adhesive tensile shear creep according to claim 6, wherein the second connection portion has a length of 57mm, a width of 15mm, and a height of 3.5mm, the second pin hole has a diameter of 7.5mm, the center of the second pin hole is located on the width-direction center line of the second connection portion, and the distance between the center of the second pin hole and the outer short side of the second connection portion is 8.75 mm;
the length of the second clamping part is 63mm, the width of the second clamping part is 15mm, the height of the second clamping part is 2mm, the length of a groove space formed by the second J-shaped hook groove is 10mm, the width of the groove space is 15mm, and the height of the groove space is 4 mm;
the second connecting part is bent by 90 degrees relative to the second clamping part to one side where the second J-shaped hook groove is located, the height of an inner side bending angle formed by bending is 6.5mm, and the height of an outer side bending angle formed by bending is 5 mm;
the diameter of the second threaded hole is 3mm, the circle center of the second threaded hole is located on the central line of the second clamping portion in the width direction, and the distance between the circle center of the second threaded hole and the short side of the outer side of the second clamping portion is 5 mm.
8. A method of performing an adhesive tensile shear creep test using the fixture of any of claims 1-7, the method comprising:
s1: measuring the bonding interface area S of the adhesive in the cross sample and the length dimension X of the adhesive in the direction of tensile load;
s2: connecting the first connecting structure of the first clamping plate with the upper connecting mechanism of the tensile instrument, embedding the transverse base material in the cross sample into the first J-shaped hook groove, and enabling the adhesive layer in the cross sample to penetrate through a gap between the two first connecting parts;
s3: arranging a second clamping plate and the first clamping plate oppositely, embedding the vertical base material in the cross sample into a second J-shaped hook groove, and connecting a second connecting structure of the second clamping plate with a lower connecting mechanism of a tension instrument;
s4: starting the tension instrument to enable an upper connecting mechanism and a lower connecting mechanism of the tension instrument to be away from each other, and applying a tension load F to the cross sample;
s5: keeping the tensile load F for a period of time, recording the deformation quantity delta X (t) of the adhesive in the tensile direction along with the time, and calculating the tensile shear creep compliance J (t) of the adhesive by using the following formula
9. The method according to claim 8, wherein the S2 further comprises: screwing a screw in the first threaded hole to tightly press the transverse base material on the inner wall of the first J-shaped hook groove;
the S3 further includes: and screwing a screw in the second threaded hole to tightly press the vertical base material on the inner wall of the second J-shaped hook groove.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447367A (en) * | 2021-06-21 | 2021-09-28 | 广东省科学院工业分析检测中心 | Device for detecting creep property of heat insulation section bar and detection method thereof |
| CN114459993A (en) * | 2022-01-14 | 2022-05-10 | 奇瑞汽车股份有限公司 | Auxiliary device and method for testing shear strength |
| CN116735311A (en) * | 2023-06-12 | 2023-09-12 | 西安交通大学 | Manufacturing method and testing method of tensile shear sample |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000009621A (en) * | 1998-06-23 | 2000-01-14 | Masaki Shiratori | Shearing jig |
| JP3130550U (en) * | 2007-01-18 | 2007-03-29 | 株式会社島津製作所 | Weld spot shear test jig and weld spot shear test equipment |
| CN201138326Y (en) * | 2008-01-10 | 2008-10-22 | 桂林工学院 | Simple apparatus for measuring stretching and shearing strength of cementing compound |
| CN101477111A (en) * | 2008-12-08 | 2009-07-08 | 杭州中策橡胶有限公司 | Method for testing tire rubber complex stress condition mechanical performance and its special equipment |
| CN104132856A (en) * | 2014-08-13 | 2014-11-05 | 中国建材检验认证集团股份有限公司 | Device and method for testing bonding shearing strength of structural adhesive interface |
| CN105067518A (en) * | 2015-09-18 | 2015-11-18 | 吉林大学 | Device and method for testing adhesion performance of adhesive for sheet substrate |
| CN105891111A (en) * | 2016-05-30 | 2016-08-24 | 三友（天津）高分子技术有限公司 | Structure adhesive tensile shear property testing fixture and using method |
| CN206556995U (en) * | 2017-03-15 | 2017-10-13 | 中国建材检验认证集团股份有限公司 | For fixture of the crossing method test architecture with sealant interface tensile strength |
| CN108254307A (en) * | 2017-12-01 | 2018-07-06 | 中航复合材料有限责任公司 | Prepreg stickiness quantitative measuring method |
| AT521815A1 (en) * | 2018-10-31 | 2020-05-15 | Univ Wien Tech | Method and means for testing the connection strength between two sample elements |
| CN211148263U (en) * | 2019-10-11 | 2020-07-31 | 东莞市奥能工程塑料有限公司 | Cross-shaped section tensile test fixture |
| CN211602685U (en) * | 2019-12-10 | 2020-09-29 | 育材堂（苏州）材料科技有限公司 | Clamp for cross stretching of welding spots |
-
2020
- 2020-10-21 CN CN202011129550.5A patent/CN112098192A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000009621A (en) * | 1998-06-23 | 2000-01-14 | Masaki Shiratori | Shearing jig |
| JP3130550U (en) * | 2007-01-18 | 2007-03-29 | 株式会社島津製作所 | Weld spot shear test jig and weld spot shear test equipment |
| CN201138326Y (en) * | 2008-01-10 | 2008-10-22 | 桂林工学院 | Simple apparatus for measuring stretching and shearing strength of cementing compound |
| CN101477111A (en) * | 2008-12-08 | 2009-07-08 | 杭州中策橡胶有限公司 | Method for testing tire rubber complex stress condition mechanical performance and its special equipment |
| CN104132856A (en) * | 2014-08-13 | 2014-11-05 | 中国建材检验认证集团股份有限公司 | Device and method for testing bonding shearing strength of structural adhesive interface |
| CN105067518A (en) * | 2015-09-18 | 2015-11-18 | 吉林大学 | Device and method for testing adhesion performance of adhesive for sheet substrate |
| CN105891111A (en) * | 2016-05-30 | 2016-08-24 | 三友（天津）高分子技术有限公司 | Structure adhesive tensile shear property testing fixture and using method |
| CN206556995U (en) * | 2017-03-15 | 2017-10-13 | 中国建材检验认证集团股份有限公司 | For fixture of the crossing method test architecture with sealant interface tensile strength |
| CN108254307A (en) * | 2017-12-01 | 2018-07-06 | 中航复合材料有限责任公司 | Prepreg stickiness quantitative measuring method |
| AT521815A1 (en) * | 2018-10-31 | 2020-05-15 | Univ Wien Tech | Method and means for testing the connection strength between two sample elements |
| CN211148263U (en) * | 2019-10-11 | 2020-07-31 | 东莞市奥能工程塑料有限公司 | Cross-shaped section tensile test fixture |
| CN211602685U (en) * | 2019-12-10 | 2020-09-29 | 育材堂（苏州）材料科技有限公司 | Clamp for cross stretching of welding spots |
Non-Patent Citations (1)
| Title |
|---|
| 林立尘: "基于十字交叉法的陶瓷粘结层剪切蠕变力学行为研究", 中国优秀硕士学位论文全文数据库工程科技Ⅰ辑, no. 2022, 16 January 2022 (2022-01-16) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447367A (en) * | 2021-06-21 | 2021-09-28 | 广东省科学院工业分析检测中心 | Device for detecting creep property of heat insulation section bar and detection method thereof |
| CN114459993A (en) * | 2022-01-14 | 2022-05-10 | 奇瑞汽车股份有限公司 | Auxiliary device and method for testing shear strength |
| CN116735311A (en) * | 2023-06-12 | 2023-09-12 | 西安交通大学 | Manufacturing method and testing method of tensile shear sample |
| CN116735311B (en) * | 2023-06-12 | 2024-04-16 | 西安交通大学 | Manufacturing method and testing method of tensile shear sample |
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