CN115219245A - Tire bump test method and device - Google Patents
Tire bump test method and device Download PDFInfo
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- CN115219245A CN115219245A CN202111575129.1A CN202111575129A CN115219245A CN 115219245 A CN115219245 A CN 115219245A CN 202111575129 A CN202111575129 A CN 202111575129A CN 115219245 A CN115219245 A CN 115219245A
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- 238000010998 test method Methods 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 82
- 238000009778 extrusion testing Methods 0.000 claims abstract description 31
- 230000003068 static effect Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 238000012669 compression test Methods 0.000 claims description 12
- 230000003116 impacting effect Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000011160 research Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000009863 impact test Methods 0.000 description 3
- 238000011076 safety test Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 230000002277 temperature effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0078—Shock-testing of vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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Abstract
The invention relates to the technical field of automobile tire performance testing, and discloses a tire crash test method and a tire crash test device, wherein the test method comprises the following steps: performing at least one of a static extrusion test, a peeling test and a dynamic extrusion test on the tire, wherein the tire tread is extruded by a pressure head at a constant speed in the static extrusion test, the side surface of the tire tread is extruded by the pressure head at a constant speed in the peeling test, and the tire tread is impacted by the pressure head in the dynamic extrusion test; recording the pressure-displacement curve of the tire in said at least one test. The test method and the test device of the invention are used for carrying out the research on the collision dynamics and the air leakage characteristics aiming at the complete tire structure, can quickly obtain the characteristics of the pneumatic tire including air leakage, and can more comprehensively understand the dynamics characteristics of the tire in the collision process.
Description
Technical Field
The invention relates to the technical field of automobile tire performance testing, in particular to a tire crash test method and device.
Background
An automobile tire is a circular elastic rubber product which is assembled on an automobile and rolls in a grounding mode, is usually installed on a metal rim, plays a role in supporting an automobile body and buffering external impact, achieves contact with a road surface and guarantees the running performance of the automobile. Tires are often used under complex and severe conditions, which are subjected to various deformations, loads, forces and high and low temperature effects during running, and therefore must have high load-bearing, traction and cushioning properties.
At present, the research on the dynamic characteristics of the automobile tire mainly aims at the dynamic test of a single wheel hub, namely only the failure characteristics of the wheel hub are considered aiming at the dynamic problem of the tire in the collision simulation process, and the influence of the tread and the internal gas pressure of the tread on the tire in the collision process is not considered. The wheel hub, the tread and the internal gas pressure of the tread form a complete tire structure, so that a collision dynamic test scheme for the whole structure of the tire is urgently needed to understand the dynamic characteristics of the tire in a collision process more comprehensively.
Disclosure of Invention
The invention aims to provide a crash dynamics test scheme for the overall structure of a tire, so that the dynamics characteristics of the tire in the crash process can be more comprehensively understood, and further direct structural rigidity information can be provided for the analysis and early-stage structural design of a crash safety test.
In order to achieve the above object, an aspect of the present invention provides a tire crash test method, including the steps of:
performing at least one test of a static extrusion test, a peeling test and a dynamic extrusion test on the tire, wherein the tire tread is extruded by a pressure head at a constant speed in the static extrusion test, the side surface of the tire tread is extruded by the pressure head at a constant speed in the peeling test, and the tire tread is impacted by the pressure head in the dynamic extrusion test;
recording the pressure-displacement curve of the tire in said at least one test.
Further, the step of the static extrusion test comprises: the tire tread is extruded at a constant speed by a first pressure head until the tire tread is extruded to be in contact with the hub, and the first pressure head stops moving;
during the pressing of the first ram against the tread, the pressure, displacement, and gas pressure in the tread are recorded over time.
Further, the step of peel testing comprises: the side surface of the tire tread is extruded at a constant speed by a second pressure head until the tire tread is separated from the hub and air leakage occurs; during the pressing of the second ram against the tread, the pressure, displacement, and gas pressure in the tread are recorded over time.
Further, the step of the dynamic compression test comprises: and impacting the tire tread through the third pressure head, and recording the acceleration of the third pressure head and a time history curve of the gas pressure in the tire tread in the impacting process.
Further, the pressure of the gas in the tire tread is measured by a pressure sensor arranged on the inflating nozzle of the tire.
Further, in the static extrusion testing step and the dynamic extrusion testing step, the axis of the tire is in the horizontal direction; in the peel test step, the axis of the tire is in a vertical direction.
In order to achieve the above object, another aspect of the present invention provides a tire crash test apparatus comprising: a tire support assembly for supporting a tire; a ram for pressing or impacting a tread of a tire placed on the tire support assembly; and the detection device is used for detecting the pressure and the displacement of the pressure head and the time history curve of the gas pressure in the tread.
Further, the tire support assembly comprises a first tire support assembly for supporting the tire during a static compression test of the tire; the ram comprises a first ram for pressing a tread of a tire disposed on the first tire support assembly; the first pressure head is a flat plate pressure head, a step surface pressure head or a triangular pressure head.
Further, the tire support assembly comprises a second tire support assembly for supporting the tire during a peel test of the tire; said ram comprising a second ram for pressing the tread of a tire placed on said second tire support assembly; the second pressure head includes connecting plate and arc, the upper end of arc with the lower surface of connecting plate is connected, the arc certainly the lower surface of connecting plate extends downwards to one side.
Further, the tire support assembly comprises a third tire support assembly for supporting the tire during a dynamic compression test of the tire; said indenter comprises a third indenter for impacting a tread of a tire disposed on said third tire support assembly; the third pressure head is a flat plate pressure head.
Compared with the prior art, the tire bump test method and the tire bump test device provided by the technical scheme have the beneficial effects that: the tire is subjected to at least one of a static extrusion test, a peeling test and a dynamic extrusion test, the pressure, displacement or acceleration of a pressure head under different working conditions and the gas pressure in the tire tread are respectively measured, the relevant time history curve can be recorded, the relation curve between the deformation of the tire and the pressure is obtained, and the peeling test inspects the air leakage characteristic of the tire caused by the separation of the tire tread and the rim; therefore, the method and the device cover the test of the collision dynamics of the whole structure of the tire, can obtain the mechanical characteristics of the tire under pressure and the tire tread peeling, can more comprehensively understand the dynamic characteristics of the tire in the collision process, and further provide direct structural rigidity information for the analysis and early structural design of the collision safety test.
Drawings
FIG. 1 is a flow chart of a tire crash test method according to an embodiment of the present invention;
FIG. 2 is a schematic view of a first tire support assembly and triangular indenter configuration according to an embodiment of the present invention;
FIG. 3 is a schematic view of a second tire support assembly and second ram in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a third tire support assembly and flat indenter configuration according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a flat plate indenter configuration according to an embodiment of the present invention;
FIG. 6 is a side view of a step face indenter of an embodiment of the present invention;
FIG. 7 is a schematic view of a triangular ram of an embodiment of the present invention;
figure 8 is a side view of a second ram of an embodiment of the present invention.
The testing machine comprises a first tire supporting assembly, a first base plate, a first left mounting plate, a first right mounting plate, a first wheel hub mounting joint, a second tire supporting assembly, a second base plate, a second wheel hub mounting joint, a second pressure head, a connecting plate, a 32-arc-shaped plate, a third tire supporting assembly, a third base plate, a second left mounting plate, a second right mounting plate, a third wheel hub mounting joint, a testing machine connecting piece, a 6-flat pressure head, a 7-step surface pressure head and a 8-triangular pressure head, wherein the first tire supporting assembly is 1, the first base plate is 11, the first left mounting plate is 12, the first right mounting plate is 13, the second pressure head is 3, the connecting plate is 31, the arc-shaped plate, the third tire supporting assembly is 4, the third base plate is 41, the second left mounting plate is 42, the second right mounting plate is 43, the third wheel hub mounting joint is 44, the testing machine connecting piece is 5, the flat pressure head is 6-flat pressure head, the step surface pressure head is 7-triangular pressure head.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., used herein are used in the orientation or positional relationship indicated in the drawings, which are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, according to an aspect of the present invention, there is provided a tire crash test method including the steps of:
performing at least one test of a static extrusion test, a peeling test and a dynamic extrusion test on the tire, wherein the tire tread is extruded by a pressure head at a constant speed in the static extrusion test, the side surface of the tire tread is extruded by the pressure head at a constant speed in the peeling test, and the tire tread is impacted by the pressure head in the dynamic extrusion test; the pressure-displacement curve of the tire was recorded for at least one test.
The sequence of the static extrusion test, the peeling test and the dynamic extrusion test can be carried out according to the actual situation, and the sequence is not limited.
In this embodiment, the step of the static compression test comprises: the tire tread is extruded at a constant speed by a first pressure head until the tire tread is extruded to be in contact with the hub, and the first pressure head stops moving; recording the pressure, the displacement and the time history curve of the gas pressure in the tire tread of the first pressure head in the process that the first pressure head presses the tire tread;
specifically, during testing, the first pressure head is driven by the testing machine to move downwards at a constant speed to extrude the tire tread, and the speed can be 10mm/min until the tire tread is compressed to a position in rigid contact with the hub; the pressure of the first ram can be obtained by measuring the compression force of the tester.
In addition, static compression tests can be respectively carried out on the tire tread through the first pressing heads with different structures, for example, three pressing heads with different structures shown in figures 5-7 can be used as the first pressing heads, and the dynamic characteristics of the tire under different contact surfaces can be more comprehensively considered through the static compression tests of the pressing heads with different structures. The tire does not leak in the static extrusion test process, and when a multi-pressure-head test is carried out, the multi-pressure-head test on the same tire can be realized by replacing the pressure head.
In this example, the step of the peel test comprises: the side surface of the tire tread is extruded at a constant speed by a second pressure head until the tire tread is separated from the hub and air leakage occurs; recording the pressure, the displacement and the time history curve of the gas pressure in the tire tread of the second pressure head in the process that the second pressure head presses the tire tread;
specifically, considering the phenomenon that the tire tread and the wheel hub are separated possibly in the collision process, the test working condition is set to investigate the air leakage characteristic of the tire caused by the separation of the tire and the wheel rim; during testing, the second pressure head continuously presses the side face of the tire tread downwards at the speed of 10mm/min until the tire tread is separated from the hub position and air leakage occurs; the pressure of the second ram can be obtained by measuring the compression force of the tester.
In this embodiment, the step of the dynamic compression test comprises: and impacting the tire tread through the third pressure head, and recording the acceleration of the third pressure head and a time history curve of the gas pressure in the tire tread in the impacting process.
Specifically, the collision working condition is dynamic impact, and the dynamic impact characteristic of the tire is simulated by adding a dynamic extrusion test considering that the tire may have completely different dynamic characteristics in static extrusion and dynamic impact; during the test, the third pressure head is arranged on the drop hammer testing machine, the mass of the hammer head is 246kg, the third pressure head can impact the tire tread at the speed of 10m/s, the test is a destructive test, and a series of phenomena such as the compression of the tire tread, the damage of a wheel hub, the air leakage of the tire and the like can occur simultaneously in the test process.
In addition, in each working condition, an acceleration sensor is attached to the pressure head, a tire pressure sensor is additionally arranged on the tire, and the relation between tire deformation and tire pressure in the test process is extracted. Considering that the tires may have different characteristics under different tire pressures, the tests were carried out with two tire pressures of 170MPa and 250MPa, i.e. the tires were first inflated to 170MPa or 250MPa before the tests.
Based on the tire collision test method, the dynamic characteristic of the tire under a certain pressing surface can be obtained through a static pressing test, the air leakage characteristic of the tire caused by the separation of the tire surface and the wheel rim during the tire collision can be obtained through a peeling test, and the influence characteristic of the impact on the tire surface, the wheel hub and the air leakage during the tire collision can be obtained through a dynamic pressing test; therefore, the method is used for researching the collision dynamics and the air leakage characteristics of the complete tire structure consisting of the hub, the tire tread and the internal air pressure of the tire tread, the dynamic characteristics of the pneumatic tire including air leakage can be quickly obtained through the method, the research on the mechanical characteristics of the pneumatic tire under pressure until the pneumatic tire is destroyed and failed in the automobile collision safety is complemented, and the blank in the field is filled.
In this embodiment, the above-described tread surface gas pressure is measured by a pressure sensor provided on the tire inflation nozzle. Specifically, the pressure sensor is mounted on an inflating nozzle of the tire through a sensor mounting interface, and the pressure value of gas in the tire tread is measured in real time.
Optionally, in the static extrusion testing step and the dynamic extrusion testing step, the axis of the tire is in the horizontal direction; in the peel test step, the axis of the tire is in the vertical direction. Namely, during a static extrusion test and a dynamic extrusion test, the tire is vertically fixed, the axis of the fixed tire is in the horizontal direction, and the collision from the front side of the tire surface during traveling is simulated; during a peeling test, the tire is horizontally fixed, the axis of the fixed tire is in the vertical direction, and a pressure head can conveniently extrude the side surface of the tire tread from the top to the bottom so as to separate the tire tread from the hub.
As shown in fig. 2 to 8, provided in another aspect according to an embodiment of the present invention is a tire crash test apparatus including a first tire support member 1 for supporting a tire when a static compression test is performed on the tire, a first ram for pressing a tread of the tire placed on the first tire support member 1, a second tire support member 2 for supporting a tire when a peeling test is performed on the tire, a second ram 3 for pressing a tread of the tire placed on the second tire support member 2, a third tire support member 4 for supporting a tire when a dynamic compression test is performed on the tire, and a third ram for impacting a tread of the tire placed on the third tire support member 4; the crash test device further comprises a detection device for detecting the pressure and displacement of the first pressure head, the pressure and displacement of the second pressure head 3, the acceleration of the third pressure head, and the gas pressure in the tread.
Based on the tire bump test device, the tire is subjected to a static extrusion test through the first tire supporting assembly 1 and the first pressure head, and the dynamic characteristics of the tire under a certain extrusion surface are obtained; carrying out a stripping test on the tire through the second tire supporting assembly 2 and the second pressure head 3 to obtain the air leakage characteristic of the tire caused by the separation of the tire surface and the rim when the tire is collided; carrying out dynamic extrusion test on the tire through the third tire supporting assembly 4 and the third pressure head to obtain the influence characteristics of impact on the tire tread, the wheel hub and air leakage when the tire is collided; therefore, the method is used for researching the collision dynamics and the air leakage characteristics of a complete tire structure consisting of a hub, a tire tread and the internal gas pressure of the tire tread; the detection device is used for measuring relevant parameters, so that a relation curve between the deformation of the tire and the pressure can be obtained; the tire crash test device can quickly obtain the dynamic characteristics of the pneumatic tire including air leakage, complement the research on the mechanical characteristics of the pneumatic tire under pressure until failure in the automobile crash safety, and fill the blank in the field.
Specifically, the method of performing the test using the tire impact test apparatus described above is consistent with the tire impact test method provided in the above-described embodiment of the present invention, that is, the test method of the above-described embodiment can be implemented based on the tire impact test apparatus.
In addition, as shown in fig. 2 and 3, the tire bump test apparatus of the present embodiment further includes a tester attachment 5, and the tester attachment 5 is connected to the first indenter, the second indenter 3, or the third indenter. The tester attachment 5 is used to connect each indenter to the tester. Specifically, the connecting piece 5 of the testing machine is structurally characterized in that the lower part of a vertical cylinder is connected with a circular plate, and the circular plate is provided with four bolt mounting through holes; used in conjunction with a conventional tensile testing machine.
Alternatively, as shown in fig. 5 to 7, the first indenter may be a flat plate indenter 6, a step face indenter 7, or a triangular indenter 8. As shown in fig. 5, the flat plate press head 6 is a rectangular flat plate, the upper part of the flat plate press head is provided with four threaded holes, the positions of the threaded holes correspond to four through holes of the connecting piece 5 of the testing machine, and the flat plate press head 6 has the width of 350mm, the length of 500mm and the thickness of 20mm; as shown in fig. 6, the step surface pressing head 7 is composed of a rectangular flat plate and a step area, the rectangular flat plate is provided with four threaded holes, the positions of the threaded holes correspond to the four through holes of the connecting piece 5 of the testing machine, the right side surface of the flat plate extends out of the step with the height of 100mm in the width and length direction, the step is arranged on one side of the flat plate and only covers half of the width of the flat plate, the section of the step area is in a shape of Chinese character ri, the wall thickness is 20mm, and the step surface is used for extruding the tire tread; as shown in fig. 7, the side of the triangular pressure head 8 is an equilateral right-angled triangle, the bevel edge is used as a mounting plane connected with the testing machine connecting piece 5, the upper threaded hole corresponds to four through holes of the testing machine mounting interface in position, the edge at the right angle is chamfered with a radius of 20mm, the supporting edge of the vertical bevel edge is reserved inside the triangle, and all the wall thicknesses are 20mm.
Specifically, during testing, the center of the flat plate pressure head 6 is aligned with the center vertex of the tire, the length direction of the flat plate pressure head is consistent with the circumferential direction of the tire, and the flat plate pressure head can extrude the tire integrally under the working condition. The length of the step surface pressure head 7 is reversely consistent with the circumferential direction of the tire, the side edge of the step area at the bottom is aligned with the width center line of the tire, and the working condition ensures that the pressure head extrudes half of the width direction of the tire. The length direction of the triangular pressure head 8 is parallel to the width direction of the tire, and the working condition ensures that the pressure head extrudes the whole width direction of the tire.
As shown in fig. 8, the second ram 3 of this embodiment includes a connecting plate 31 and an arc-shaped plate 32, an upper end of the arc-shaped plate 32 is connected to a lower surface of the connecting plate 31, and the arc-shaped plate 32 extends obliquely downward from the lower surface of the connecting plate 31. Specifically, as shown in fig. 3 and 8, the connecting plate 31 is provided with four mounting threaded holes for connecting with the tester connecting piece 5, an arc-shaped plate 32 forming an included angle of 60 degrees with the connecting plate 31 is arranged on one side surface of the connecting plate 31, and when the second pressing head 3 presses the tread downwards, the arc-shaped plate 32 inclines by 30 degrees relative to the vertical direction; the arc radius of the arc-shaped plate 32 is 215mm, the arc length is 150mm, and the wall thickness is 20mm; in addition, the arc-shaped plate 32 and the flat plate are supported and connected through two reinforcing plates with the thickness of 20mm.
Specifically, during the experiment, 3 uses the time with tire flat places the pressure head, and the pressure head base is parallel with the tire side, and the arc limit is apart from wheel hub 10mm, does benefit to and peels off tread and wheel hub.
As shown in fig. 2, in the present embodiment, the first tire supporting assembly 1 includes a first base plate 11, a first left mounting plate 12, a first right mounting plate 13 and a first hub mounting segment 14, the first left mounting plate 12 and the first right mounting plate 13 are oppositely disposed on the first base plate 11, and the first hub mounting segment 14 is transversely disposed between the first left mounting plate 12 and the first right mounting plate 13.
Specifically, the first hub mounting section 14 is composed of a square mounting flat plate, a cylinder with the diameter of 50mm and a circular hub mounting disc, wherein the square mounting flat plate is provided with 4 bolt mounting through holes; 5 bolt installation through-holes on the wheel hub mounting disc. During the installation, earlier penetrate the tire spoke outwards from cylinder one side on first wheel hub installation festival 14 to it is fixed with wheel hub and wheel hub mounting disc through the bolt, again with first right side mounting panel 13 through the bolt install first bottom plate 11 on, the circular column one end inserts the centre bore on first right side mounting panel 13 on tire and the first wheel hub installation festival 14 assembly that will install, through the bolt with first left side mounting panel 12 with square dull and stereotyped fixed connection of installation, then with first left side mounting panel 12 fixed to the bottom plate mounting panel. The axis of the tire thus mounted is horizontal.
As shown in fig. 3, in the present embodiment, the second tire support assembly 2 includes a second base plate 21 and a second hub mounting segment 22 longitudinally disposed on the second base plate 21. Specifically, the second bottom plate 21 is a rectangular plate with the bottom part heightened by 150mm, the bolt mounting position above the rectangular plate is two rectangular grooves, the clamp can be used by considering different tire sizes, and the rectangular bolt mounting groove is designed. The second base plate 21 is designed to protect the static tester from large bending moments, so the stripping indenter, i.e. the second indenter 3, is designed to be substantially centered with the bottom mounting hole.
In addition, with continued reference to FIG. 3, the second hub mounting segment 22 includes an upper portion for coupling to a hub, the upper portion may be configured the same as the first hub mounting segment 14, and the lower portion of the second hub mounting segment 22 is coupled to the second base plate 21. The peeling test does not need a supporting structure on the side, the side of the tire faces upwards after the tire is fixedly connected with the second hub mounting section 22, and the second hub mounting section 22 is mounted on the base plate mounting plate through bolts.
As shown in fig. 4, the third tire support assembly 4 includes a third base plate 41, a second left mounting plate 42, a second right mounting plate 43, and a third hub mounting section 44, wherein the second left mounting plate 42 and the second right mounting plate 43 are oppositely disposed on the third base plate 41, and the third hub mounting section 44 is transversely disposed between the second left mounting plate 42 and the second right mounting plate 43.
Specifically, the second left mounting plate 42 and the second right mounting plate 43 are bilaterally symmetrical and are both in an L-shaped structure with a triangular support. The middle direction of the long side vertical plate of the L shape is provided with a rectangular long hole, and the short side of the L shape is provided with four bolt mounting through holes. During installation, the second right mounting plate 43 is first mounted on the mounting plate by bolts, one side of the cylinder of the assembly of the tire and the third hub mounting section 44 is inserted into the central rectangular long hole of the second left mounting plate 42, then the other side of the third hub mounting section 44 is inserted into the central rectangular long hole of the second right mounting plate 43, and finally the second left mounting plate 42 is fixed on the mounting plate of the third bottom plate 41. Wherein, third hub installation festival 44 is by diameter 50mm cylinder add the wheel hub mounting disc and constitutes, 5 bolt mounting through-holes on the disc.
In addition, in the present embodiment, as shown in fig. 4, in the dynamic compression test, the third ram used was a flat ram 6, the flat ram 6 was attached to a drop weight tester, and the hammer head mass was 246kg, and hit the tread of the tire at a speed of 10 m/s.
To sum up, the embodiment of the invention provides a tire crash test method and a tire crash test device, which are used for researching a test design scheme of tire crash dynamics and air leakage characteristics, so that on one hand, the mechanical characteristics of a tire under pressure and tread peeling can be obtained, and direct structural rigidity information is provided for analysis and early structural design of a crash safety test. On the other hand, the detailed test matrix also provides basic information for developing a more detailed pneumatic tire finite element model, the simulation analysis precision can be improved, and the collision test method and the device have the characteristics of low cost, simple operation and strong universality.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A tire crash test method, comprising the steps of:
performing at least one of a static extrusion test, a peeling test and a dynamic extrusion test on the tire, wherein the tire tread is extruded by a pressure head at a constant speed in the static extrusion test, the side surface of the tire tread is extruded by the pressure head at a constant speed in the peeling test, and the tire tread is impacted by the pressure head in the dynamic extrusion test;
recording the pressure-displacement curve of the tire in said at least one test.
2. A tire crash test method as in claim 1, wherein said step of static compression testing comprises: the tire tread is extruded at a constant speed by a first pressure head until the tire tread is extruded to be in contact with the hub, and the first pressure head stops moving;
during the pressing of the first ram against the tread, the pressure, displacement, and gas pressure in the tread are recorded over time.
3. The tire bump test method of claim 1, wherein the step of peel testing comprises: the side surface of the tread is extruded at a constant speed by a second pressure head until the tread is separated from the hub and air leakage occurs; during the pressing of the second ram against the tread, the pressure, displacement, and gas pressure in the tread are recorded over time.
4. A tire crash test method as in claim 1, wherein said step of dynamic compression testing comprises: and impacting the tire tread through the third pressure head, and recording the acceleration of the third pressure head and a time history curve of the gas pressure in the tire tread in the impacting process.
5. The method of claim 1, wherein the in-tread gas pressure is measured by a pressure sensor provided on a tire inflation nozzle.
6. The tire bump test method according to claim 1, wherein in the static compression test step and the dynamic compression test step, an axis of the tire is in a horizontal direction; in the peel test step, the axis of the tire is in a vertical direction.
7. A tire bump test device, comprising: a tire support assembly for supporting a tire; a ram for pressing or impacting a tread of a tire placed on the tire support assembly; and the detection device is used for detecting the pressure and the displacement of the pressure head and the time history curve of the gas pressure in the tread.
8. The tire crash test apparatus of claim 7, wherein said tire support assembly comprises a first tire support assembly for supporting the tire during static compression testing of the tire; the ram comprises a first ram for pressing a tread of a tire disposed on the first tire support assembly; the first pressure head is a flat plate pressure head, a step surface pressure head or a triangular pressure head.
9. The tire crash test apparatus of claim 7, wherein said tire support assembly comprises a second tire support assembly for supporting a tire during a peel test of the tire; said ram comprising a second ram for pressing the tread of a tire placed on said second tire support assembly; the second pressure head includes connecting plate and arc, the upper end of arc with the lower surface of connecting plate is connected, the arc certainly the lower surface of connecting plate extends downwards to one side.
10. The tire crash test apparatus of claim 7, wherein said tire support assembly comprises a third tire support assembly for supporting the tire during dynamic compression testing of the tire; said indenter comprises a third indenter for impacting a tread of a tire disposed on said third tire support assembly; the third pressure head is a flat plate pressure head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111575129.1A CN115219245A (en) | 2021-12-20 | 2021-12-20 | Tire bump test method and device |
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