CN117804933B - Tool and method for shearing test of metal composite material - Google Patents
Tool and method for shearing test of metal composite material Download PDFInfo
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- CN117804933B CN117804933B CN202410225244.3A CN202410225244A CN117804933B CN 117804933 B CN117804933 B CN 117804933B CN 202410225244 A CN202410225244 A CN 202410225244A CN 117804933 B CN117804933 B CN 117804933B
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- 238000012360 testing method Methods 0.000 title claims abstract description 129
- 239000002905 metal composite material Substances 0.000 title claims abstract description 35
- 238000010008 shearing Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004154 testing of material Methods 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007660 shear property test Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013142 basic testing Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The invention discloses a tool and a method for a metal composite material shear test, which belong to the technical field of metal shear tests and comprise the following steps: the jig comprises a universal assembly and a jig assembly, wherein the universal assembly is provided with a jig mounting groove; the jig assembly comprises a containing piece and a fixing piece, one end of the containing piece is detachably arranged in the jig mounting groove, a clamping hole, a primary containing groove and a secondary containing groove are formed in the containing piece, the primary containing groove is located between the clamping hole and the secondary containing groove, the primary containing groove is formed in the central position of the containing piece, and the fixing piece is detachably arranged in the secondary containing groove; the center alignment of the metal composite material shearing test tool and the universal material testing machine is guaranteed, the center position of the sample in the tool assembly is guaranteed, the friction force between the sample and the primary accommodating groove is reduced, and the friction force between the sample and the L-shaped locking plate is also reduced, so that the accuracy and the reliability of the test are improved.
Description
Technical Field
The invention belongs to the technical field of metal shear tests, and particularly relates to a tool and a method for a metal composite material shear test.
Background
In order to ensure the composite strength of the metal composite material, the metal composite material needs to be subjected to a shear force test, wherein the shear force test is used for measuring the resistance performance of the metal composite material under the action of the shear force, is one of basic test methods for testing the mechanical performance of the metal composite material, and is realized by a special shear force test device arranged on a clamping head of a universal material tester. The common detection method is that a metal composite material sample is extracted and cut by a wire to prepare a tensile shear test sample, two ends of the tensile shear test sample are respectively clamped and fixed on a chuck of a universal material tester, and then a test force is applied to the longitudinal end of the tensile shear test sample to detect the shearing force resistance of the tensile shear test sample.
The currently adopted tool or fixture comprises a fixed block and a movable block, and can be specifically referred to a universal material testing machine sample loading fixture with the prior patent publication number of CN217845861U, wherein the test flow is as follows: and loading a shear test sample into the space between the two blocks, pressing the shear test sample onto the shear test sample by a push head of a universal material tester, or stretching the shear test sample on a tool or a clamp by the push head of the universal material tester, and finally obtaining a shear test result. However, the center alignment of the shearing test sample in the shearing test sample area cannot be ensured by the test method and the tool, the friction force between the sample and the tool is large, the problem that the sample is unstable in the tool can occur, and the accuracy and the reliability of the test are reduced.
Disclosure of Invention
In order to solve the problems, the invention provides a metal composite material shear test tool and a method capable of guaranteeing the alignment of the center of a shear sample in a shear test sample area, reducing friction force between the sample and a jig and reducing deflection instability of the sample in the jig.
The technical scheme of the invention is as follows:
The invention relates to a shear test tool for a metal composite material, which comprises the following components:
the universal assembly is provided with a jig mounting groove;
The jig assembly comprises a containing piece and a fixing piece, one end of the containing piece is detachably arranged in the jig installation groove, a clamping hole, a primary containing groove and a secondary containing groove are formed in the containing piece, the primary containing groove is located between the clamping hole and the secondary containing groove, the primary containing groove is formed in the central position of the containing piece, and the fixing piece is detachably arranged in the secondary containing groove.
Further, the universal assembly comprises a straight male head, a female head and a mounting seat, the jig mounting groove is formed in one end of the female head, the other end of the female head is movably clamped in the mounting seat, the mounting seat is detachably connected with one end of the straight male head, and the straight male head is abutted against the female head.
Further, the universal assembly further comprises a limiting piece, and the limiting piece is detachably connected with the straight male head.
Further, the fixture mounting groove is provided with a through hole, and the fixture mounting groove is penetrated on the through hole.
Further, the mounting is L type locking plate and screw, L type locking plate with the holding piece all is equipped with the connecting hole, L type locking plate is located second grade holding tank, the screw penetrates L type locking plate with the connecting hole of holding piece.
The invention relates to a metal composite material shear test method, which is executed by adopting the metal composite material shear test tool and comprises the following steps:
step S1, assembling and installing a universal assembly:
putting the female head into the mounting seat, rotationally fixing the straight male head and the mounting seat by threads, sleeving the limiting piece into the straight male head, rotationally fixing the limiting piece and the straight male head by threads, completing the assembly of the universal assembly, and fixedly connecting the other end of the straight male head with the universal material testing machine;
Step S2, preparing a tensile shear test sample:
Extracting a metal composite material sample, and performing linear cutting on the metal composite material sample, wherein a cut tensile shear test sample comprises a boss and a rod body;
S3, installing a fixed tensile shear test sample:
Aligning a boss of a tensile shear test sample with a clamping hole, installing a rod body of the tensile shear test sample in a primary accommodating groove, installing an L-shaped locking plate in a secondary accommodating groove, penetrating the L-shaped locking plate and the connecting hole of the accommodating piece by using a screw, and fixing the tensile shear test sample in a jig assembly;
step S4, installing a jig assembly with a tensile shear test sample:
Placing the accommodating part in the jig mounting groove, penetrating the clamping part into the through hole, and fixing the jig assembly with the tensile shear test sample on a universal assembly fixedly connected with the universal material testing machine;
Step S5, entering a shear force test:
The other end of the tensile-shear test sample is clamped by the clamping head of the universal material testing machine, the shearing speed is set to be 35mm/min, the start button is executed, the clamping head of the universal material testing machine moves longitudinally until the boss of the tensile-shear test sample is bonded and separated from the rod body, the maximum force F max is recorded, the cross section area S of the bonding part of the boss of the tensile-shear test sample and the rod body is calculated before testing, and then the shearing force intensity T is calculated.
Further, in the step S2, it is necessary to measure the width W of the boss of the pull-shear test sample and the thickness H of the boss of the pull-shear test sample, and calculate the cross-sectional area S of the bonding portion between the boss of the pull-shear test sample and the shaft, where the calculation formula of the cross-sectional area S is as follows:
S=W*H；
Wherein W is the width of the boss of the tensile shear test sample, and H is the thickness of the boss of the tensile shear test sample;
The calculation formula of the shear force intensity T in the step S5 is as follows:
T=Fmax÷S；
Wherein F max is the maximum tensile force of the current tensile shear test sample, and S is the cross-sectional area of the bonding part of the boss of the tensile shear test sample and the rod body.
Further, the step S2 further includes: dividing the tensile-shear test sample into a first area, a second area and a third area, measuring and recording thickness values of the first area, the second area and the third area, and calculating and confirming that three thickness differences are within 0.2 mm.
Further, the step S3 further includes: and (3) selecting a corresponding L-shaped locking plate according to the thickness h max according to the thickness h max of the third region of the tensile-shear test sample obtained in the step (S2).
Further, the step S3 further includes: and checking the fixture component for installing the fixed tensile shear test sample, checking the gap G1 between the L-shaped locking plate and the secondary accommodating groove with a feeler gauge to be not more than 0.10mm, and checking the gap G2 between the L-shaped locking plate and the tensile shear test sample to be not more than 0.20mm.
The invention has the beneficial effects that:
(1) The center alignment of the metal composite material shearing test tool and the universal material testing machine is ensured, namely, a universal assembly is designed, the universal assembly can enable the tool assembly to freely rotate in the universal assembly around the center point by 360 degrees, and in the process of stretching a sample, if the sample is in deflection instability, the tool assembly can move along the deflection direction due to the universal assembly, and the sample and the tool assembly are aligned with the center of the universal material testing machine, so that the problem of deflection instability of the sample is solved;
(2) The center position of the sample in the jig assembly is ensured, namely, a primary accommodating groove of the jig assembly is designed to be arranged at the center position of the accommodating piece, the sample is arranged in the primary accommodating groove, and the sample is naturally arranged on a center alignment line of the universal material testing machine;
(3) The friction force between the sample and the primary accommodating groove is reduced, namely the sample is arranged in the primary accommodating groove, the fixing piece is arranged in the secondary accommodating groove, the width of the primary accommodating groove is larger than that of the sample, and the fixing piece is not clung to the sample, so that when the chuck of the universal material testing machine stretches the sample, the sample has a movable space in the primary accommodating groove, compared with a compact structure, the friction force between the sample and the primary accommodating groove is reduced, and the friction force between the sample and the L-shaped locking plate is also reduced, thereby improving the accuracy and reliability of the test.
Drawings
FIG. 1 is a schematic diagram of an exploded structure of a tool for shear testing of a metal composite material according to the present invention;
FIG. 2 is an enlarged schematic view of the accommodating member of the metal composite shear test tool according to the present invention;
FIG. 3 is a schematic sectional view of a combined state of a receiving member, a fixing member and a tensile shear test sample of the metal composite material shear test tool of the present invention;
FIG. 4 is a schematic diagram of the overall structure of the tool for shear test of the metal composite material of the present invention;
FIG. 5 is a schematic view of an exploded view of another embodiment of a gimbal assembly of a metal composite shear test tooling of the present invention;
FIG. 6 is a schematic diagram of the structure of a tensile shear test specimen according to the present invention;
FIG. 7 is a label of a first region, a second region, and a third region of a tensile shear test specimen according to the present invention;
FIG. 8 is a view of a metal composite shear test tooling of the present invention;
FIG. 9 is a bottom view of the receiver, fixture and tensile shear test specimen of the metal composite shear test tooling of the present invention;
fig. 10 is an enlarged schematic structural view of an L-shaped locking plate of the metal composite shear test tool of the present invention.
Reference numerals: 1. universal component, 11, straight male, 12, female, 13, mount pad, 14, spacing piece, 15, tool mounting groove, 151, through-hole, 16, a letter head, 17, male, 18, bottom ring, 2, tool component, 21, holding piece, 21a, head, 21b, body, 211, card hole, 212, first level holding groove, 213, second level holding groove, 22, mounting, 221, L type locking piece, 2211, protruding portion, 222, screw, 3, card and establish piece, 4, connecting hole, 5, tensile shear test sample, 51, boss, 52, shaft, 53, first region, 54, second region, 55, third region.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 10, the metal composite shear test tooling of the present invention includes:
the universal assembly 1 is used for being connected with a universal material testing machine and also used for installing a jig assembly 2 of a tensile shear test sample to be tested, and can freely rotate and move in 360 degrees, and the universal assembly 1 is provided with a jig installation groove 15;
Preferably, the universal assembly 1 includes a male end 11, a female end 12, and a mounting seat 13, the male end 11 is a fixed end, the female end 12 is a movable end, the mounting seat 13 provides a movable space for the female end 12, the female end 12 can freely rotate for 360 degrees in the mounting seat 13 by taking the male end 11 as a center, the jig mounting groove 15 is arranged at one end of the female end 12, the other end of the female end 12 is movably clamped in the mounting seat 13, the mounting seat 13 is detachably connected with one end of the male end 11, and the male end 11 is abutted against the female end 12; the male head 11 is provided with external threads, the mounting seat 13 is internally provided with internal threads, the male head 11 and the mounting seat 13 are fixedly connected through threads, the male head 11 is provided with a hemispherical bulge, and the female head 12 is provided with a hemispherical concave surface, so that the hemispherical concave surface can freely rotate for 360 degrees by taking the hemispherical bulge as the center; referring to fig. 8, in the process of stretching the sample, if the sample is deflected and unstable, the universal assembly 1 enables the jig assembly 2 to move along the deflection direction, so that the sample and the jig assembly 2 are aligned with the center of the universal material testing machine, and the problem of deflection and instability of the sample is solved.
The jig assembly 2 is used for installing a tensile shear test sample, the jig assembly 2 comprises an accommodating part 21 and a fixing part 22, one end of the accommodating part 21 is detachably installed in the jig installation groove 15, a clamping hole 211, a primary accommodating groove 212 and a secondary accommodating groove 213 are formed in the accommodating part 21, the primary accommodating groove 212 is located between the clamping hole 211 and the secondary accommodating groove 213, fig. 9 shows that the primary accommodating groove 212 is arranged at the central position of the accommodating part 21, and the fixing part 22 is detachably installed in the secondary accommodating groove 213; referring to fig. 6, the tensile-shear test sample includes a boss 51 and a shaft 52, the boss 51 is clamped in the clamping hole 211, the shaft 52 is positioned in the primary accommodating groove 212, and since the shaft 52 is installed in the primary accommodating groove 212, the sample is naturally placed on the center alignment line of the universal material tester, and the shaft 52 and the straight male head 11 are in the same straight line in combination with the straight male head 11 of the universal assembly 1;
Specifically, the accommodating member 21 includes a head 21a and a body 21b, the head 21a is clamped in the jig mounting groove 15, and the clamping hole 211, the primary accommodating groove 212 and the secondary accommodating groove 213 are provided in the body 21 b. The mounting 22 is L type locking plate 221 and screw 222, L type locking plate 221 with hold the piece 21 and all be equipped with connecting hole 4, L type locking plate 221 is located second grade holding tank 213, screw 222 penetrates L type locking plate 221 with hold the piece 21 connecting hole 4, connecting hole 4 is the screw hole, connecting hole 4 and screw hole screw-thread fit cover one-level holding tank 212 through L type locking plate 221.
Referring to fig. 1, the L-shaped locking piece is designed because the bottom of the L-shaped locking piece can be abutted against the bottom of the accommodating member 21, and the L-shaped locking piece 221 needs to be ensured to be in the secondary accommodating groove 213 only by the screw 222 to be fixed, and the L-shaped bottom and the screw 222 are double fixed to the locking piece, so that the locking piece cannot fall off due to the influence of external force.
Referring to fig. 2, the body 21b of the accommodating member 21 is cylindrical, the first-stage accommodating groove 212 and the second-stage accommodating groove 213 are both opened in the body 21b, and the sample and the L-shaped locking piece 221 are slidably disposed at corresponding positions along the corresponding accommodating grooves, so that the width of the first-stage accommodating groove 212 is slightly larger than the width of the sample, and the width of the second-stage accommodating groove 213 is slightly larger than the width of the L-shaped locking piece 221, so that when the sample is mounted in the jig assembly 2, referring to fig. 3, a gap G1 exists between the L-shaped locking piece 221 and the second-stage accommodating groove 213, and a gap G2 exists between the tensile-shear test sample 5 and the L-shaped locking piece 221. Preferably, G1 is not greater than 0.10mm and G2 is not greater than 0.20mm; the L-shaped locking piece 221 of the fixing piece 22 is not tightly attached to the tensile shear test sample 5, so that when the chuck of the universal material testing machine stretches the sample, the tensile shear test sample 5 has a movable space in the primary accommodating groove 212, compared with a compact structure, the friction force between the tensile shear test sample 5 and the primary accommodating groove 212 is reduced, the friction force between the tensile shear test sample 5 and the L-shaped locking piece 221 of the fixing piece 22 is also reduced, the accuracy and reliability of the test are improved, in addition, the primary accommodating groove 212 and the L-shaped locking piece 221 also limit the movable space of the sample, and the sample deflection instability can be prevented.
Further, the universal assembly 1 further includes a limiting member 14, the limiting member 14 is detachably connected with the male end 11, the limiting member 14 is located above the mounting seat 13 and is used for limiting the position of the mounting seat 13, the limiting member 14 is a nut, the limiting member 14 is in threaded connection with the male end 11, and the mounting seat 13 can be prevented from moving or loosening on the male end 11 through the limiting member 14.
Further, still include the card and establish the piece 3, refer to fig. 1, the card is established the piece 3 and is the abnormal shape pin, be equipped with through-hole 151 of tool mounting groove 15, the card is established the piece 3 and is worn to locate on the through-hole 151 to block the export of tool mounting groove 15, prevent that tool subassembly 2 from leaving universal subassembly 1.
Referring to fig. 5, a second embodiment of the gimbal assembly 1: the universal assembly 1 comprises a letter head 16, a male head 17, a mounting seat 13 and a bottom ring 18, wherein the letter head 16 is provided with a hemispherical concave surface, and the male head 17 is provided with a hemispherical protrusion. The round holes at two ends of the mounting seat 13 are as large as each other, the diameters of the round holes at two ends of the mounting seat 13 are larger than the diameters of the round holes at two ends of the mounting seat 13 and the diameters of the hemispherical protrusions, the bottom ring 18 is of a structure with unequal diameters at two ends, the bottom ring 18 is in threaded connection with the mounting seat 13, the jig mounting groove 15 is formed in one end of the male head 17, the other end of the male head 17 is movably clamped in the mounting seat 13 through the bottom ring 18, the mounting seat 13 is detachably connected with one end of the letter head 16, the letter head 16 is in butt joint with the male head 17, namely, the hemispherical protrusions rotate around the circle center of the hemispherical inner concave surface.
The invention relates to a metal composite material shear test method which is characterized by being implemented by adopting the metal composite material shear test tool and comprising the following steps of:
Step S1, assembling and installing the universal assembly 1:
Putting the female head 12 into the mounting seat 13, rotationally fixing the straight male head 11 and the mounting seat 13 by screw threads, sleeving the limiting piece 14 into the straight male head 11, rotationally fixing the limiting piece 14 and the straight male head 11 by screw threads, completing the assembly of the universal assembly 1, fixedly connecting the other end of the straight male head 11 with a universal material testing machine, arranging a plurality of round holes at the end of the straight male head 11 connected with the universal material testing machine, penetrating the round holes by cylindrical pins, and fixedly connecting the straight male head 11 with the universal material testing machine;
Step S2, preparing a tensile shear test sample:
extracting a metal composite material sample, performing linear cutting on the metal composite material sample, wherein the cut tensile-shear test sample comprises a boss 51 and a rod body 52, and the shape of the sample is designed to be matched with that of the jig assembly 2;
S3, installing a fixed tensile shear test sample:
Aligning the boss 51 of the tensile and shear test sample with the clamping hole 211, installing the rod 52 of the tensile and shear test sample in the first-stage accommodating groove 212, installing the L-shaped locking plate 221 in the second-stage accommodating groove 213, sliding the rod 52 and the L-shaped locking plate 221 in the first-stage accommodating groove 212 and the second-stage accommodating groove 213, penetrating the L-shaped locking plate 221 and the connecting hole 4 of the accommodating part 21 by using a screw 222, and fixing the tensile and shear test sample in the jig assembly 2;
step S4, installing a jig assembly 2 with a tensile shear test sample:
the head of the accommodating part 21 is placed in the jig mounting groove 15, the clamping part 3 is penetrated in the through hole 151, and the jig assembly 2 with the tensile and shearing test sample is fixed on the universal assembly 1 fixedly connected with the universal material testing machine;
Step S5, entering a shear force test:
The other end of the tensile-shear test sample is clamped by the chuck of the universal material testing machine, the shearing speed is set to be 35mm/min, the start button is executed, the chuck of the universal material testing machine moves longitudinally until the boss 51 of the tensile-shear test sample is bonded and separated from the rod body 52, the maximum force F max is recorded, and then the shearing force intensity T is calculated.
Further, in the step S2, the width W of the boss 51 of the tensile-shear test sample and the thickness H of the boss 51 of the tensile-shear test sample need to be measured, and a digital micrometer caliper is used to measure the width W and the thickness H of the boss 51 of the tensile-shear test sample, and calculate the cross-sectional area S of the bonding portion between the boss 51 and the shaft 52 of the tensile-shear test sample, where the calculation formula of the cross-sectional area S is as follows:
S=W*H；
Wherein W is the width of the boss 51 of the tensile shear test sample, and H is the thickness of the boss 51 of the tensile shear test sample;
The calculation formula of the shear force intensity T in the step S5 is as follows:
T=Fmax÷S；
Wherein F max is the maximum tensile force of the current tensile test sample, and S is the cross-sectional area of the bonding part of the boss 51 and the rod body 52 of the tensile test sample.
Further, the step S2 further includes: dividing a tensile shear test sample into a first area 53, a second area 54 and a third area 55, wherein the first area 53 is positioned above the boss 51, the second area 54 and the third area 55 are positioned below the boss 51, measuring and recording thickness values of the first area 53, the second area 54 and the third area 55, and calculating and confirming that three thickness differences are within 0.2 mm; because the sample belongs to rectangular shape, there is thickness difference in the cutting process, so thickness difference control is in 0.2mm, and thickness difference is in 0.2mm, has guaranteed that the thickness of the sample that cuts out can not differ too greatly.
Further, the step S3 further includes: according to the thickness h max of the third region 55 of the tensile and shear test sample 5 obtained in the step S2, a corresponding L-shaped lock piece is selected according to the interval value where the thickness h max falls, and as more than one L-shaped lock piece 221 is provided, referring to fig. 10, the back surface of the L-shaped lock piece 221 is provided with a protruding portion 2211, the protruding portion 2211 has different thicknesses, and the protruding portion includes an L-shaped lock piece K 1 with a protruding portion thickness of 0.15mm, an L-shaped lock piece K 2 with a protruding portion thickness of 0.20mm, and an L-shaped lock piece K 3 with a protruding portion thickness of 0.25 mm. In order to control h max + the protrusion thickness=2.1 mm-2.15mm section, the gap G1 and the gap G2 are ensured, and the clearance G1 and the gap G2 can be measured by the feeler gauge, the thickness is divided into three section values, the first section value is not less than 1.95mm, the second section value is 1.9mm-1.95mm, and the third section value is 1.85mm-1.90mm, referring to the following table.
| H max actual measurement range | L-shaped locking plate selection |
| hmax≥1.95mm | K1=0.15mm |
| 1.90mm≤hmax≤1.95mm | K2=0.20mm |
| 1.85mm≤hmax≤1.90mm | K3=0.25mm |
Further, the step S3 further includes: checking the fixture assembly 2 for installing the fixed tensile shear test sample, checking that a gap G1 between the L-shaped locking plate 221 and the secondary accommodating groove 213 is not more than 0.10mm by using a feeler gauge, and checking that a gap G2 between the tensile shear test sample 5 and the L-shaped locking plate 221 is not more than 0.20mm. The gap G1 and the gap G2 are checked for checking whether the sample has a movable space in the primary receiving groove 212, preventing too tight connection, preventing generation of a large friction force between the shear test process sample and the primary receiving groove 212, and preventing generation of a large friction force between the shear test process sample and the L-shaped locking piece 221, thereby further improving accuracy and reliability of the test.
The above examples illustrate only one embodiment of the invention, which is described in more detail and is not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. Metal composite shear test frock, its characterized in that includes:
the universal assembly (1), the universal assembly (1) is provided with a jig mounting groove (15);
The jig assembly (2), the jig assembly (2) comprises a containing piece (21) and a fixing piece (22), one end of the containing piece (21) is detachably arranged in the jig mounting groove (15), a clamping hole (211), a primary containing groove (212) and a secondary containing groove (213) are formed in the containing piece (21), the primary containing groove (212) is located between the clamping hole (211) and the secondary containing groove (213), the primary containing groove (212) is formed in the central position of the containing piece (21), and the fixing piece (22) is detachably arranged in the secondary containing groove (213);
The universal assembly (1) comprises a straight male head (11), a female head (12) and an installation seat (13), wherein the jig installation groove (15) is formed in one end of the female head (12), the other end of the female head (12) is movably clamped in the installation seat (13), the installation seat (13) is detachably connected with one end of the straight male head (11), and the straight male head (11) is abutted against the female head (12);
The universal assembly (1) further comprises a limiting piece (14), and the limiting piece (14) is detachably connected with the straight male head (11);
the fixture comprises a fixture mounting groove (15), and is characterized by further comprising a clamping piece (3), wherein the fixture mounting groove (15) is provided with a through hole (151), and the clamping piece (3) is arranged on the through hole (151) in a penetrating manner;
The fixing piece (22) is an L-shaped locking piece (221) and a screw (222), the L-shaped locking piece (221) and the accommodating piece (21) are both provided with a connecting hole (4), the L-shaped locking piece (221) is arranged in the secondary accommodating groove (213), and the screw (222) penetrates into the L-shaped locking piece (221) and the connecting hole (4) of the accommodating piece (21);
The width of the primary accommodating groove (212) is larger than that of the sample, and the width of the secondary accommodating groove (213) is larger than that of the L-shaped locking plate (221).
2. The method for testing the shearing of the metal composite material is characterized by being carried out by adopting the tool for testing the shearing of the metal composite material according to claim 1 and comprises the following steps:
step S1, assembling and installing the universal assembly (1):
Putting a female head (12) into a mounting seat (13), rotationally fixing a straight male head (11) and the mounting seat (13) through threads, sleeving a limiting piece (14) into the straight male head (11), rotationally fixing the limiting piece (14) and the straight male head (11) through threads, completing the assembly of the universal assembly (1), and fixedly connecting the other end of the straight male head (11) with a universal material testing machine;
step S2, preparing a tensile shear test sample (5):
Extracting a metal composite material sample, and performing linear cutting on the metal composite material sample, wherein a cut tensile shear test sample (5) comprises a boss (51) and a rod body (52);
step S3, installing a fixed tensile shear test sample (5):
Aligning a boss (51) of a tensile shear test sample (5) with a clamping hole (211), installing a rod body (52) of the tensile shear test sample (5) in a first-stage accommodating groove (212), installing an L-shaped locking plate (221) in a second-stage accommodating groove (213), penetrating the L-shaped locking plate (221) and the connecting hole (4) of the accommodating piece (21) by using a screw (222), and fixing the tensile shear test sample (5) in a jig assembly (2);
S4, installing a jig assembly (2) with a tensile shear test sample (5):
The accommodating part (21) is placed in the jig mounting groove (15), the clamping part (3) is arranged in the through hole (151) in a penetrating mode, and the jig assembly (2) with the tensile shear test sample (5) is fixed on the universal assembly (1) fixedly connected with the universal material testing machine;
Step S5, entering a shear force test:
The chuck of the universal material testing machine clamps the other end of the tensile shear test sample (5), the shearing speed is set to be 35mm/min, a start button is executed, the chuck of the universal material testing machine moves longitudinally until a boss (51) of the tensile shear test sample (5) is bonded and separated from a rod body (52), the maximum force F max is recorded, and then the shearing force intensity T is calculated;
in the step S2, it is necessary to measure the width W of the boss (51) of the tensile-shear test sample (5) and the thickness H of the boss (51) of the tensile-shear test sample (5), and calculate the cross-sectional area S of the bonding portion between the boss (51) of the tensile-shear test sample (5) and the shaft (52), where the calculation formula of the cross-sectional area S is as follows:
S=W*H；
Wherein W is the width of the boss of the tensile shear test sample, and H is the thickness of the boss of the tensile shear test sample;
The calculation formula of the shear force intensity T in the step S5 is as follows:
T=Fmax÷S；
Wherein F max is the maximum tensile force of the current tensile shear test sample, and S is the cross-sectional area of the bonding part of the boss of the tensile shear test sample and the rod body.
3. The method according to claim 2, wherein the step S2 further comprises: dividing the tensile-shear test sample (5) into a first area (53), a second area (54) and a third area (55), measuring and recording thickness values of the first area (53), the second area (54) and the third area (55), and calculating and confirming that three thickness differences are within 0.2 mm.
4. The method according to claim 3, wherein the step S3 further comprises: and (3) selecting a corresponding L-shaped locking plate (221) according to the thickness h max according to the thickness h max of the third region (55) of the tensile-shear test sample (5) obtained in the step S2.
5. The method according to claim 2, wherein the step S3 further comprises: and checking the fixture component (2) for finishing the installation of the fixed tensile shear test sample (5), checking the gap G1 between the L-shaped locking plate (221) and the secondary accommodating groove (213) with a feeler gauge to be not more than 0.10mm, and checking the gap G2 between the L-shaped locking plate (221) and the tensile shear test sample (5) to be not more than 0.20mm.
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