CN113447371B - High-precision testing method for equivalent statics torsion parameters of dot matrix plates - Google Patents
High-precision testing method for equivalent statics torsion parameters of dot matrix plates Download PDFInfo
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- CN113447371B CN113447371B CN202110957757.XA CN202110957757A CN113447371B CN 113447371 B CN113447371 B CN 113447371B CN 202110957757 A CN202110957757 A CN 202110957757A CN 113447371 B CN113447371 B CN 113447371B
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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
- G01N3/26—Investigating twisting or coiling properties
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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
- G01M13/00—Testing of machine parts
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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
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0021—Torsional
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a high-precision test method for equivalent statics torsion parameters of a dot matrix plate, which adopts a test device for the equivalent statics torsion parameters of the dot matrix plate; the method comprises the following steps: firstly, a fixed end and a torsion end of a test piece are respectively placed on a fixed platform and a lower rotary fixture in the middle, and at the moment, a sliding block is moved to enable the lower rotary fixture to be kept horizontal left and right; then, the heights of the movable clamp and the upper rotary clamp are adjusted according to the thickness of the test piece, and then the test piece is fixed; then, adjusting the measuring rod to enable the lower end of the measuring rod to be flush with the zero scale mark of the scale table; and finally, applying torque to the test piece by adding weights and/or moving a sliding block, recording the scale value pointed by the test rod, namely the relative displacement of the two force transmission columns, and obtaining the equivalent torsional rigidity of the test piece through corresponding calculation. The invention solves the problems of low test precision, complex experimental equipment and the like of the equivalent torsional rigidity of the existing lattice plate.
Description
Technical Field
The invention belongs to the technical field of mechanical property testing of metal or nonmetal lattice plates, and particularly relates to a high-precision testing method for equivalent statics torsion parameters of lattice plates.
Background
The lattice material is a periodic porous structure, and has the excellent performances of light weight, high strength, high specific stiffness, heat insulation, sound absorption, high energy absorption rate and the like due to the structural particularity. Usually, a sandwich panel is manufactured by a dot matrix material and an upper skin and a lower skin, and the sandwich panel is widely applied to structures such as airplane fuselages, tires, train floor surfaces and the like. In practical application, the lattice board is inevitably subjected to the action of torque, so that the study and design of the torsional rigidity of the lattice board have very important engineering significance.
At present, although some products for testing the structural torsion parameters exist, the structure is relatively complex, the manufacturing cost is high, devices such as sensors and strain gauges are often needed, device devices special for testing the equivalent torsion rigidity of the lattice plate are lacked, and most of the devices are only devices for testing the structural torsion parameters such as a mandrel, a vehicle body and a torsion shaft.
Therefore, a new high-precision test method for equivalent statics torsion parameters of the lattice plates needs to be designed.
Disclosure of Invention
The invention aims to provide a high-precision testing method for equivalent static torsional parameters of a dot matrix plate, and aims to solve the problems that the conventional torsional parameter testing device provided in the background technology is complex, high in manufacturing cost, lack of special device equipment for testing equivalent torsional rigidity of a dot matrix sandwich panel and the like.
In order to achieve the purpose, the invention provides a high-precision test method for equivalent statics torsion parameters of a dot matrix plate, which adopts a test device for the equivalent statics torsion parameters of the dot matrix plate, wherein the test device for the equivalent statics torsion parameters of the dot matrix plate comprises a fixed platform, a movable clamp, an upper rotary clamp, a lower rotary clamp, a force transmission column, a connecting plate, a movable support, a sliding block, a measuring rod, a scale table, a weight bearing structure and a weight;
the movable clamp is detachably arranged above the fixed platform, and the fixed platform and the movable clamp are used for fixing the fixed end of the test piece;
the middle position of the connecting plate is hinged with the top of the movable support, two ends of the connecting plate are respectively hinged with a measuring rod and a weight bearing structure, and weights are arranged on the weight bearing structure; a scale table is arranged beside the measuring rod, and scale marks for measuring vertical displacement are marked on the scale table; the connecting plate is also provided with a sliding block which can move along the length direction of the connecting plate; the lower ends of the two force transmission columns are symmetrically hinged on the connecting plate, and the upper ends of the two force transmission columns are symmetrically hinged on the lower rotary clamp; the upper rotary clamp is detachably arranged above the lower rotary clamp, and the upper rotary clamp and the lower rotary clamp are used for clamping the torsion end of the test piece;
the high-precision testing method for the equivalent statics torsion parameters of the lattice plate specifically comprises the following steps: firstly, a fixed end and a torsion end of a test piece are respectively placed on a fixed platform and a lower rotary fixture in the middle, and at the moment, a sliding block is moved to enable the lower rotary fixture to be kept horizontal left and right; then, the heights of the movable clamp and the upper rotary clamp are adjusted according to the thickness of the test piece, and then the test piece is fixed; then, adjusting the measuring rod to enable the lower end of the measuring rod to be flush with the zero scale mark of the scale table; and finally, applying torque to the test piece by adding weights and/or moving a sliding block, recording the scale value pointed by the test rod, namely the relative displacement of the two force transmission columns, and obtaining the equivalent torsional rigidity of the test piece through corresponding calculation.
In a specific embodiment, the connecting plate is marked with scale marks, and the sliding block moves in the range of the connecting plate marked with the scale marks; the slider includes first slider and second slider, one of first slider and second slider sets up on the connecting plate along, and another sets up at the connecting plate lower limb, arbitrary one in first slider and the second slider is the leveling slider that is used for the leveling connecting plate, and another is the loading slider that is used for the application of force.
In a specific embodiment, the measuring rod and the weight bearing structure have the same weight.
In one specific embodiment, the distance between the two force transfer columns is half the distance between the measuring rod and the weight support structure.
In a specific embodiment, the device for testing equivalent statics torsion parameters of the lattice plate further comprises a fixed bolt and a fixed nut, and the movable clamp is detachably arranged on the fixed platform through the fixed bolt and the fixed nut; the upper rotary clamp is detachably arranged above the lower rotary clamp through a fixing bolt and a fixing nut.
In a specific embodiment, the distance between the movable clamp and the fixed platform is adjusted through rotation of the fixed bolt and the fixed nut, and the distance between the upper rotary clamp and the lower rotary clamp is also adjusted through rotation of the fixed bolt and the fixed nut so as to adapt to test pieces with different thicknesses.
In a specific embodiment, the device for testing equivalent statics torsion parameters of the lattice plate further comprises a first adjusting gasket, and the first adjusting gasket is arranged between the movable clamp and the fixed platform; the device for testing equivalent statics torsion parameters of the dot matrix plate further comprises a second adjusting gasket, the second adjusting gasket is arranged between the upper rotating clamp and the lower rotating clamp, and the first adjusting gasket and the second adjusting gasket are used for keeping the testing piece in a front and back horizontal state before testing.
In a specific embodiment, the first and second shims are identical in size and shape.
In a specific embodiment, the movable support coincides with the center line of symmetry of the fixed platform, and the movable support can move back and forth relative to the fixed platform.
In a specific embodiment, the measuring rod is a telescopic measuring rod; the weight comprises a weight-increasing weight.
Compared with the prior art, the invention has the following beneficial effects:
the invention solves the problems of low test precision, complex experimental equipment and the like of the equivalent torsional rigidity of the existing lattice plate.
The invention provides a device for testing equivalent statics torsion parameters of a dot matrix plate, which has the advantages of simple structure, low manufacturing cost and strong universality.
The invention designs the leveling sliding block and the adjusting gasket, can realize high-precision leveling of the test piece before loading, and reduces the influence of the bending moment effect, the dead weight and the like of the test piece.
The invention combines the loading device and the testing device together, thereby greatly facilitating the test.
The ratio of the distance between two force transmission columns to the length of the connecting plate is 1: 2, the relative torque displacement of the two sides of the test piece can be directly read.
The algorithm provided by the invention is suitable for calculating the equivalent torsional rigidity of the lattice sandwich panel and the honeycomb core layer, can be expanded to the test of the equivalent torsional rigidity of the test piece under other boundary conditions, also considers the influence of the thickness and the Poisson ratio of the material of the test piece, and has accurate result.
Meanwhile, the invention can also provide experimental data support for theoretical analysis and finite element numerical simulation research of the dot matrix sandwich panel.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of an equivalent statics torsion parameter testing device for a lattice plate according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a suspended portion of a test piece in an equivalent statics torsion parameter testing apparatus for a lattice board according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a honeycomb core layer unit cell in a lattice plate isostatic torsion parameter testing apparatus according to an embodiment of the present invention;
wherein, 1, fixing the bolt; 2. fixing a nut; 3. moving the clamp; 4. a fixed platform; 5. testing the piece; 6. rotating the clamp upwards; 7. a lower rotary clamp; 8. a force transmission column; 9. a measuring rod; 10. a first slider; 11. a scale table; 12. a connecting plate; 13. moving the support; 14. a second slider; 15. a weight bearing structure; 16. a weight; 17. a first adjustment pad; 18. a second adjustment pad.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
The invention discloses a high-precision test method for equivalent statics torsion parameters of a dot matrix plate, which adopts a test device for the equivalent statics torsion parameters of the dot matrix plate, wherein the test device for the equivalent statics torsion parameters of the dot matrix plate comprises a fixed platform 4, a movable clamp 3, an upper rotary clamp 6, a lower rotary clamp 7, a force transmission column 8, a connecting plate 12, a movable support 13, a sliding block, a measuring rod 9, a scale table 11, a weight support structure 15 and a weight 16;
the movable clamp 3 is detachably arranged above the fixed platform 4, and the fixed platform 4 and the movable clamp 3 are used for fixing the fixed end of the test piece 5;
the middle position of the connecting plate 12 is hinged with the top of the movable support 13, the two ends of the connecting plate 12 are respectively hinged with the measuring rod 9 and the weight bearing structure 15, and the weight 16 is arranged on the weight bearing structure 15; a scale table 11 is arranged beside the measuring rod 9, and scale lines for measuring vertical displacement are marked on the scale table 11; the connecting plate 12 is also provided with a slide block which can move along the length direction of the connecting plate 12; the lower ends of the two force transmission columns 8 are symmetrically hinged on the connecting plate 12, and the upper ends of the two force transmission columns 8 are symmetrically hinged on the lower rotary clamp 7; the upper rotary clamp 6 is detachably arranged above the lower rotary clamp 7, and the upper rotary clamp 6 and the lower rotary clamp 7 are used for clamping the torsion end of the test piece 5;
the high-precision testing method for the equivalent statics torsion parameters of the lattice plate specifically comprises the following steps: firstly, a fixed end and a twisting end of a test piece 5 are respectively placed on a fixed platform 4 and a lower rotary clamp 7 in the middle, at the moment, a sliding block is moved to enable the lower rotary clamp 7 to keep horizontal, then the heights of a movable clamp 3 and an upper rotary clamp 6 are adjusted according to the thickness of the test piece 5, and then the test piece 5 is fixed; then, adjusting the measuring rod 9 to make the lower end of the measuring rod be level with the zero scale mark of the scale table 11; finally, torque is applied to the test piece 5 by adding the weight 16 and/or moving the sliding block, scale values pointed by the test rod 9, namely the relative displacement of the two force transmission columns 8, are recorded, and the equivalent torsional rigidity of the test piece 5 can be obtained through corresponding calculation.
The connecting plate 12 is marked with scale marks, and the sliding block moves in the range of the connecting plate 12 marked with the scale marks; the sliders comprise a first slider 10 and a second slider 14, one of the first slider 10 and the second slider 14 is arranged on the upper edge of the connecting plate 12, the other one is arranged on the lower edge of the connecting plate 12, any one of the first slider 10 and the second slider 14 is a leveling slider for leveling the connecting plate, and the other one is a loading slider for applying force. When in measurement, the loaded load is mainly applied by the weight on the weight bearing structure, and when the accurate fine adjustment is needed, the fine adjustment can be carried out by moving the sliding block.
The measuring rod 9 and the weight bearing structure 15 have the same weight. The weight is the same, namely, the two sides can be mutually offset, and the additional influence on the test is reduced.
The distance between the two force transfer columns 8 is half of the distance between the measuring rod 9 and the weight bearing structure 15. The relative torque displacement is directly read out.
The device for testing the equivalent statics torsion parameters of the lattice plate further comprises a fixed bolt 1 and a fixed nut 2, and a movable clamp 3 is detachably arranged on a fixed platform 4 through the fixed bolt 1 and the fixed nut 2; the upper rotary jig 6 is detachably disposed above the lower rotary jig 7 by the fixing bolt 1 and the fixing nut 2.
The distance between the movable clamp 3 and the fixed platform 4 is adjusted through the rotation of the fixed bolt 1 and the fixed nut 2, and the distance between the upper rotary clamp 6 and the lower rotary clamp 7 is also adjusted through the rotation of the fixed bolt 1 and the fixed nut 2 so as to adapt to the test pieces 5 with different thicknesses.
The device for testing equivalent statics torsion parameters of the lattice boards further comprises a first adjusting gasket 17, wherein the first adjusting gasket 17 is arranged between the movable clamp 3 and the fixed platform 4 and used for keeping the testing piece 5 in a front and back horizontal state before testing.
The device for testing the equivalent statics torsion parameters of the lattice boards further comprises a second adjusting gasket 18, wherein the second adjusting gasket 18 is arranged between the upper rotating clamp 6 and the lower rotating clamp 7 and used for keeping the testing piece 5 in a front-back horizontal state before testing.
The first adjustment shim 17 and the second adjustment shim 18 are identical in size and shape.
The movable support 13 is superposed with the symmetrical center line of the fixed platform 4, and the movable support 13 can move back and forth relative to the fixed platform 4.
The measuring rod 9 is a telescopic measuring rod; the weight 16 comprises a weight-increasing weight.
The length of the suspended part of the test piece 5 is a, and the width of the suspended part is b.
The distance from the hinge center of the measuring rod 9 and the connecting plate 12 to the hinge center of the weight dragging and bearing structure 15 and the connecting rod 12 is l1。
The equivalent torsional stiffness algorithm of the test piece 5 is based on the following equation
In general, M of isotropic plate structurexy＝-MyxAnd for the sandwich layer M of the honeycomb structurexy≠-Myx. Thus deriving the equivalent torsional stiffness DxyIn the meantime, two cases of the sandwich panel and the sandwich layer are discussed with respect to specific boundary conditions.
If the test piece 5 is a honeycomb core layer, the length of the inclined wall plate is l, and the thickness of the inclined wall plate is t1The length of the straight wall plate is h, and the thickness of the straight wall plate is t2The internal cell angle is θ and the thickness is t (see fig. 3).
If the test piece 5 is a dot matrix sandwich panel, the equivalent torsional rigidity D of the test piecexyIs calculated by the formula
Wherein a is the length of the suspended part of the test piece 5, b is the width of the test piece 5, Δ z is the vertical displacement obtained by the test rod 9, m is the mass of the weight 16, m is the weight of the weight1Is the mass of the slider, /)1Is the distance l from the hinge center of the measuring rod 9 and the connecting plate 12 to the hinge center of the weight dragging and bearing structure 15 and the connecting rod 122Is the distance from the slider to the center of the connecting rod 12 and g is the local gravitational acceleration.
If the test piece 5 is a honeycomb core layer, the equivalent torsional rigidity D of the test piecexyIs calculated by the formula
In the formula
qτThe values of (A) are shown in the following table according to the ratio of the thickness of the sandwich layer to the length of the panel and the Poisson's ratio of the materials
Example 1
Equivalent torsional stiffness was measured for a 6063 aluminum alloy honeycomb sandwich panel/honeycomb core of 100 x 60 x 18 mm:
placing the test piece 5 on the fixed platform 4 and the lower rotary clamp 7 in the middle, moving the first slide block 10 to enable the lower rotary clamp 7 to be horizontal left and right, adding a first adjusting gasket 17 and/or a second adjusting gasket 18 according to the front and back inclination degree of the test piece 5 to enable the test piece 5 to be horizontal front and back, and adjusting the lower end position of the measuring rod 9 to enable the lower end position to be flush with the zero scale line of the scale table 11; then, according to the thickness 18mm of the test piece 5, the positions of the movable clamp 3 and the upper rotary clamp 6 are adjusted, and the fixing bolt 1 and the fixing nut 2 are screwed to achieve the purpose of fixing the test piece 5. Then, a weight 16 is added to apply a torque to the test piece 5 through the connecting plate 12 and the force-transmitting column 8, and relative displacement is obtained by observing the measuring rod 9 and the scale 11. Finally, the corresponding torque and relative displacement are recorded, and the equivalent torsional rigidity of the test piece 5 can be obtained through calculation. It should be noted that the product of the weight of the added weight and the distance from the weight bearing structure 15 to the center of the connecting plate is the applied torque; the required deflection can be obtained by converting the relative displacement of the corresponding cross sections observed on the measuring rod 9 and the scale table 11.
Example 2
Equivalent torsional stiffness was measured for a 3003 aluminum alloy honeycomb sandwich panel/honeycomb core of 100 x 60 x 18 mm:
placing the test piece 5 on the fixed platform 4 and the lower rotary clamp 7 in the middle, moving the first slide block 10 to enable the lower rotary clamp 7 to be horizontal left and right, adding a first adjusting gasket 17 and/or a second adjusting gasket 18 according to the front and back inclination degree of the test piece 5 to enable the test piece 5 to be horizontal front and back, and adjusting the lower end position of the measuring rod 9 to enable the lower end position to be flush with the zero scale line of the scale table 11; then, according to the thickness 18mm of the test piece 5, the positions of the movable clamp 3 and the upper rotary clamp 6 are adjusted, and the fixing bolt 1 and the fixing nut 2 are screwed to achieve the purpose of fixing the test piece 5. Then, a weight 16 is added and the second slide 14 is moved to apply a torque to the test piece 5 through the connecting plate 12 and the force-transmitting column 8, and relative displacement is obtained by observing the measuring rod 9 and the scale 11. Finally, the corresponding torque and relative displacement are recorded, and the equivalent torsional rigidity of the test piece 5 can be obtained through calculation. It should be noted that the product of the weight of the added weight and the distance from the weight bearing structure 15 to the center of the connecting plate is the applied torque, and the method for calculating the applied torque by moving the second slider 14 is the same as the method for calculating the applied torque; the relative displacement of the corresponding cross section observed on the measuring rod 9 and the calibration platform 11 is converted to obtain the required deflection.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions and substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A high-precision test method for equivalent statics torsion parameters of a lattice plate is characterized in that a lattice plate equivalent statics torsion parameter test device is adopted, and the lattice plate equivalent statics torsion parameter test device comprises a fixed platform (4), a movable clamp (3), an upper rotary clamp (6), a lower rotary clamp (7), a force transmission column (8), a connecting plate (12), a movable support (13), a sliding block, a measuring rod (9), a scale table (11), a weight bearing structure (15) and weights (16);
the movable clamp (3) is detachably arranged above the fixed platform (4), and the fixed platform (4) and the movable clamp (3) are used for fixing the fixed end of the test piece (5);
the middle position of the connecting plate (12) is hinged with the top of the movable support (13), two ends of the connecting plate (12) are respectively hinged with a measuring rod (9) and a weight bearing structure (15), and weights (16) are arranged on the weight bearing structure (15); a scale table (11) is arranged beside the measuring rod (9), and scale lines for measuring displacement in the vertical direction are marked on the scale table (11); the connecting plate (12) is also provided with a sliding block which can move along the length direction of the connecting plate (12); the lower ends of the two force transmission columns (8) are symmetrically hinged on the connecting plate (12), and the upper ends of the two force transmission columns (8) are symmetrically hinged on the lower rotary clamp (7); the upper rotary clamp (6) is detachably arranged above the lower rotary clamp (7), and the upper rotary clamp (6) and the lower rotary clamp (7) are used for clamping the torsion end of the test piece (5);
the high-precision testing method for the equivalent statics torsion parameters of the lattice plate specifically comprises the following steps: firstly, a fixed end and a torsion end of a test piece (5) are respectively placed on a fixed platform (4) and a lower rotary clamp (7) in the middle, and at the moment, a sliding block is moved to enable the lower rotary clamp (7) to be kept horizontal left and right; then, the heights of the movable clamp (3) and the upper rotary clamp (6) are adjusted according to the thickness of the test piece (5), and then the test piece (5) is fixed; then, adjusting the measuring rod (9) to enable the lower end of the measuring rod to be flush with the zero scale mark of the scale table (11); and finally, applying torque to the test piece (5) by adding a weight (16) and/or moving a sliding block, recording a scale value pointed by the measuring rod (9), namely the relative displacement of the two force transmission columns (8), and obtaining the equivalent torsional rigidity of the test piece (5) through corresponding calculation.
2. The lattice board equivalent statics torsion parameter high precision test method according to claim 1, characterized in that, the connecting plate (12) is marked with scale marks, the slide block moves in the range of the connecting plate (12) marked with scale marks; the sliding blocks comprise a first sliding block (10) and a second sliding block (14), one of the first sliding block (10) and the second sliding block (14) is arranged on the upper edge of the connecting plate (12), the other one of the first sliding block (10) and the second sliding block (14) is arranged on the lower edge of the connecting plate (12), any one of the first sliding block (10) and the second sliding block (14) is a leveling sliding block used for leveling the connecting plate, and the other one of the first sliding block (10) and the second sliding block is a loading sliding block used for applying force.
3. The lattice board equivalent statics torsion parameter high precision test method according to claim 1, characterized in that the weight of the measuring rod (9) and the weight bearing structure (15) are the same.
4. The lattice board equivalent statics torsion parameter high precision test method according to claim 1, characterized in that the distance between two force transfer columns (8) is half of the distance between the measuring rod (9) and the weight bearing structure (15).
5. The lattice board equivalent statics torsion parameter high-precision testing method according to claim 1, characterized in that the lattice board equivalent statics torsion parameter testing device further comprises a fixing bolt (1) and a fixing nut (2), and the movable clamp (3) is detachably arranged on the fixing platform (4) through the fixing bolt (1) and the fixing nut (2); the upper rotary clamp (6) is detachably arranged above the lower rotary clamp (7) through a fixing bolt (1) and a fixing nut (2).
6. The lattice board equivalent statics torsion parameter high-precision testing method according to claim 5, characterized in that the distance between the movable clamp (3) and the fixed platform (4) is adjusted through rotation of the fixed bolt (1) and the fixed nut (2), and the distance between the upper rotary clamp (6) and the lower rotary clamp (7) is also adjusted through rotation of the fixed bolt (1) and the fixed nut (2) so as to adapt to testing pieces (5) with different thicknesses.
7. The lattice board equivalent statics torsion parameter high precision testing method according to claim 1, characterized in that the lattice board equivalent statics torsion parameter testing device further comprises a first adjusting gasket (17), the first adjusting gasket (17) is arranged between the movable clamp (3) and the fixed platform (4); the device for testing the equivalent statics torsion parameters of the dot matrix plates further comprises a second adjusting gasket (18), the second adjusting gasket (18) is arranged between the upper rotating clamp (6) and the lower rotating clamp (7), and the first adjusting gasket (17) and the second adjusting gasket (18) are used for keeping the testing piece (5) in a front-back horizontal state before testing.
8. The lattice board equivalent statics torsion parameter high precision test method according to claim 7, characterized in that the first adjusting shim (17) and the second adjusting shim (18) are identical in size and shape.
9. The lattice board equivalent statics torsion parameter high precision test method according to claim 1, characterized in that the symmetry center line of the movable support (13) and the fixed platform (4) is overlapped, and the movable support (13) can move back and forth relative to the fixed platform (4).
10. The lattice board equivalent statics torsion parameter high precision test method according to claim 1, characterized in that the measuring rod (9) is a telescopic measuring rod; the weight (16) comprises a weight-increasing weight.
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| CN201909742U (en) * | 2011-01-20 | 2011-07-27 | 北京科技大学 | Constant load type stress corrosion twisting tester |
| CN103808572A (en) * | 2014-02-13 | 2014-05-21 | 中国林业科学研究院木材工业研究所 | Simple method for various creepage tests and device thereof |
| CN104359754A (en) * | 2014-10-10 | 2015-02-18 | 中国科学院工程热物理研究所 | Beam component bending and torsion combined load test device and method |
| CN205333428U (en) * | 2015-12-24 | 2016-06-22 | 贵州大学 | Big -and -middle -sized building element's torsion test device |
| CN208297106U (en) * | 2018-05-31 | 2018-12-28 | 中国航发沈阳发动机研究所 | A kind of engine blade torsional rigidity test of vehicular device |
| CN110501125A (en) * | 2019-08-16 | 2019-11-26 | 天津大学 | A kind of flexible support torsion stiffness parameter Simplified Test Equipment and test method |
| CN212110979U (en) * | 2020-05-14 | 2020-12-08 | 安徽新华学院 | Automobile engineering is with torsion test device |
| CN213239771U (en) * | 2021-04-20 | 2021-05-18 | 中南大学 | Device for testing elastic statics parameter in equivalent plane of lattice material |
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