CN111307593A - Testing arrangement suitable for two-way creep performance of flexible membrane material - Google Patents
Testing arrangement suitable for two-way creep performance of flexible membrane material Download PDFInfo
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- CN111307593A CN111307593A CN202010261718.1A CN202010261718A CN111307593A CN 111307593 A CN111307593 A CN 111307593A CN 202010261718 A CN202010261718 A CN 202010261718A CN 111307593 A CN111307593 A CN 111307593A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a testing device suitable for bidirectional creep performance of a flexible membrane, which comprises a tension applying system and a bracket (9); the tension applying system comprises a steel frame (1), a force transmission screw (2), a movable clamp (4), a dynamometer (3), a sleeve bolt (7), a rolling shaft joint (5), a flexible force transmission rod (6), a loading cylinder (8) and an adjustable bracket (17); according to the invention, a bidirectional loading mode is adopted, the creep performance test of the flexible membrane in the actual use process can be effectively simulated according to the actual engineering requirements, the research on the creep performance of the flexible membrane under bidirectional tension load with any stress proportion and stress level is realized, the scientificity and applicability of the test result are obviously improved, the tension and displacement changes can be recorded and observed in real time through the dynamometer (3) and the extensometer, and the performances in the aspects of load stability, synchronism, test operability and the like are excellent.
Description
Technical Field
The invention relates to the technical field of testing of mechanical properties of flexible films, in particular to a testing device suitable for bidirectional creep property of flexible films.
Background
The flexible film material has excellent performances such as flexibility, flexible design, high specific strength and the like, and is widely applied to the national defense and civil fields, including military fields such as body armor, armor plate and fabric reinforced helmet, and civil fields such as safety air pillow, space deployable structure (air bag, sail, parachute and the like), tension and inflatable film building and the like. The creep property of the flexible membrane refers to the phenomenon that the strain increases along with the increase of time under the condition that the stress on the membrane is not changed. Under the long-term action of load, the membrane material can generate obvious creep deformation, and can cause material and structure damage in severe cases, thereby influencing the overall performance of the structure. Creep strain is obviously influenced by stress states, at present, the creep performance testing devices at home and abroad are few, the creep performance testing devices mainly focus on stress conditions in a unidirectional tension state, and the flexible membrane material is often in a complex bidirectional stress state in engineering application. The stress state of the membrane material under the normal working condition is characterized by the stress proportion and the stress level together, and a testing device capable of realizing the creep performance of the flexible membrane material under the bidirectional tension load with any proportion and stress level does not appear.
Disclosure of Invention
The invention aims to provide a testing device suitable for the bidirectional creep performance of a flexible membrane, which realizes the test of the creep performance of the flexible membrane under bidirectional tension load with any stress proportion and stress level, has excellent performances in the aspects of load stability, synchronism, test operability and the like, and has reliable test results.
The technical scheme adopted for solving the technical problem is as follows:
a testing device suitable for bidirectional creep performance of a flexible film comprises a tension applying system and a bracket; the tension applying system comprises a steel frame, a force transmission screw, a movable clamp, a dynamometer, a sleeve bolt, a rolling shaft joint, a flexible force transmission rod, a loading cylinder and an adjustable bracket; the steel frame is a cross frame, has enough strength and rigidity, is a main force bearing part, the inner side of the steel frame is provided with a U-shaped chute, the end part of the periphery of the frame is provided with a hole, the upper surface of the peripheral extending arm of the steel frame is provided with a graduated scale, the force transmission screw is a circular steel bar with screw threads, is arranged on the bidirectional symmetrical axis of the steel frame and is used for connecting parts and transmitting force, the force transmission screw is provided with a dynamometer for measuring the bidirectional axial force in the early loading process, the movable clamp is arranged in the peripheral extending arm of the steel frame and is connected with the force transmission screw through a threaded interface at the end part of the movable clamp, the movable clamp is provided with a fixed knob for fixing a film material sample, a PE bar mounting groove and a pressing sheet which can be contacted with the fixed knob are arranged in the movable clamp, the pressing sheet is a rectangular steel sheet with a concave-convex surface, and the pressing sheet is pushed, the flexible dowel bar is arranged around the device and comprises a threaded connector, a steel strand and a steel hook, the threaded connector is connected with a force transmission screw rod through a sleeve bolt, the steel hook is arranged below the steel strand and connected with a loading cylinder for vertical force transmission, a roller joint is arranged on a central axis of the end part of the steel frame, rollers are arranged on the roller joint, the load is transmitted in a steering mode through the rollers, the rollers are arranged to highly meet the level force transmission of the horizontal section of the flexible dowel bar, an adjustable support is arranged below the center of the support and comprises an extensometer fixing platform and a height adjusting knob, and the extensometer is used for being placed and fixed.
Compared with the prior art, the invention has the following remarkable advantages:
the invention adopts a bidirectional loading mode, can effectively simulate the test of the creep property of the flexible membrane material in the actual use process according to the actual engineering requirements, realizes the research of the creep property of the flexible membrane material under bidirectional tension load with any stress proportion and stress level, obviously improves the scientificity and applicability of the test result, can record and observe the change of tension and displacement in real time through the dynamometer and the extensometer, and has excellent performances in the aspects of load stability, synchronism, test operability and the like.
Drawings
Fig. 1 is a schematic three-dimensional structure of the present invention.
FIG. 2 is a two-dimensional schematic of a portion of the structure of the present invention, illustrating the structure of the tension applying system.
FIG. 3 is a three-dimensional representation of a portion of the structure of the present invention, illustrating the scaffold structure.
Fig. 4 is a three-dimensional schematic diagram of a portion of the structure of the present invention, illustrating the mobile clamp structure.
Fig. 5 is a three-dimensional schematic diagram of a portion of the structure of the present invention, illustrating the mobile clamp structure.
FIG. 6 is a two-dimensional schematic of a portion of the structure of the present invention, showing a side view of the mobile clamp.
FIG. 7 is a two-dimensional schematic of a portion of the structure of the present invention, illustrating the mobile clamp structure.
Fig. 8 is a three-dimensional schematic diagram of a part of the structure of the invention, and illustrates the flexible dowel bar composition structure.
Fig. 9 is a three-dimensional schematic of a portion of the structure of the present invention, illustrating a steel frame structure.
FIG. 10 is a two-dimensional schematic of a portion of the structure of the present invention, showing a side view of the steel frame.
Fig. 11 is a three-dimensional schematic view of a portion of the structure of the present invention, illustrating a roller joint structure.
FIG. 12 is a two-dimensional representation of a portion of the structure of the present invention, showing a front view of a roller joint.
FIG. 13 is a two-dimensional representation of a portion of the structure of the present invention, showing a rear view of a roller joint.
FIG. 14 is a two-dimensional representation of a portion of the structure of the present invention, showing a side view of a roller joint.
FIG. 15 is a three-dimensional schematic view of a portion of the structure of the present invention, illustrating the loading cylinder structure.
FIG. 16 is a three-dimensional schematic view of a portion of the structure of the present invention, illustrating an adjustable brace structure.
FIG. 17 is a schematic view of a cruciform sample of the invention.
FIG. 18 is a schematic view of a rectangular sample of the present invention.
FIG. 19 is a schematic end weld of a sample.
In the figure: 1. the device comprises a steel frame, 2 force transmission screws, 3 force meters, 4 movable clamps, 5 rolling shaft joints, 6 flexible force transmission rods, 7 sleeve bolts, 8 loading cylinders and 9 supports. 10. The device comprises a threaded connector, 11 fixing knobs, 12 pressing sheets, 13 joints, 14 steel strands, 15 steel hooks, 16 rollers, 17 adjustable supports, 18 extensometer fixing platforms, 19 height adjusting knobs, 20 PE rod mounting grooves, 21 upper clamping sheets, 22 lower clamping sheets, 23 back plates, 24 bearing rods, 25 reinforcing ribs and 26 hollow frames.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
1-16, a test device suitable for bi-directional creep performance of flexible film includes a tension applying system and a frame 15; the tension applying system comprises a steel frame 1, a force transmission screw 2, a movable clamp 4, a dynamometer 3, a sleeve bolt 7, a rolling shaft joint 5, a flexible force transmission rod 6, a loading cylinder 8 and an adjustable bracket 17; the method is characterized in that: the steel frame 1 is a cross frame, has enough strength and rigidity, is a main force bearing part, the inner side is provided with a U-shaped chute, the end part of the periphery of the frame is provided with a hole, the upper surface of the peripheral extending arm of the steel frame 1 is provided with a graduated scale, the force transmission screw 2 is a round steel bar with screw threads, is arranged on the bidirectional symmetrical axis of the steel frame 1 and is used for part connection and force transmission, the force transmission screw is provided with a dynamometer 3 used for measuring the bidirectional axial force in the early loading process, the movable clamp 4 is arranged in the peripheral extending arm of the steel frame 1 and is connected with the force transmission screw 2 through a threaded interface 10 at the end part of the movable clamp 4, the movable clamp 4 is provided with a fixed knob 11 for fixing a film material sample, a PE bar installation groove 20 and a pressing sheet 12 which can be contacted with the fixed knob 11 are arranged in the movable clamp 4, and the pressing sheet 12 is a rectangular steel sheet with, the fixing of the clamping end part of the sample is realized by rotating the fixing knob 11 to jack the pressing sheet 12, the PE rod mounting groove 20 has a good reinforcing effect on the fixing of the end part of the sample, and the stability of the sample film material in the test process is ensured; the flexible dowel bar 6 is arranged around the device and comprises a threaded joint 13, a steel strand 14 and a steel hook 15, the threaded joint 13 is connected with the dowel screw 2 through a sleeve bolt 7, the steel hook 15 is arranged below the steel strand 14 and connected with a loading cylinder 8 for vertical force transfer, the roller joint 5 is arranged on a central axis of the end part of the steel frame 1, a roller 16 is arranged on the roller joint 5, the load steering transfer is realized through the roller, the roller is highly arranged to meet the horizontal force transfer of the horizontal section of the flexible dowel bar 6, and the adjustable support 17 is arranged below the center of the support 9 and comprises an extensometer fixing platform 18 and a height adjusting knob 19 and is used for placing and fixing the extensometer.
The extensometer is arranged below the membrane material sample, the setting height of the extensometer is adjusted as required through the adjustable support 17, the influence of the self weight of the extensometer on a test result is eliminated, the extensometer is used for measuring unidirectional/bidirectional strain in the creep process of the membrane material and recording data, the strain measurement direction can be set at a proper position in the sample according to actual requirements, and the category and the measuring range of the extensometer are selected according to the test requirements.
The specific test method is as follows:
firstly, determining a test scheme, for example, setting variables such as the shape of a membrane material sample, an off-axis angle, creep duration, a two-way stress ratio, a stress level and the like, selecting a sample with a proper shape and size and manufacturing the sample, wherein a cross-shaped sample with extending arms is generally selected for researching the creep property of the membrane material under the action of two-way stress, as shown in figure 17, and the extending arms are in fillet transition; for the research on the creep property of the membrane material under the action of the unidirectional load, a rectangular sample is generally adopted and is shown in figure 18, and the size of the sample is determined according to the size of an actual device and the test requirement;
secondly, symmetrically installing samples, symmetrically placing the PE rods at the end parts of the samples in the PE rod installation grooves 20, jacking the pressing sheets 12 with concave-convex surfaces by rotating the fixed knobs 11 on the movable fixture 4 to apply uniform clamping force on the samples, and determining the number of the fixed knobs 11 according to actual requirements to ensure the stable clamping of the membrane material in the creep test process;
thirdly, symmetrically installing the movable clamps 4 in the chutes of the steel frame 1, connecting the movable clamps with the force transmission screw rods, and symmetrically adjusting the movable clamps 4 to the same scales according to the length of the extending arm of the sample and the test requirement by referring to the graduated scale on the extending arm of the steel frame 1;
fourthly, symmetrically placing the loading cylinders 8 on the steel hooks 15 on the periphery, referring to the numerical value of the dynamometer 3, bidirectionally and symmetrically placing a required loading medium to apply required initial pretension to the membrane material, then arranging the adjustable support 17 at the center of the bottom of the support 9, rotating the height adjusting knob 19 to enable the extensometer fixing platform 18 to reach a required testing height, fixing the selected extensometer on the fixing platform 18, fixing the extensometer at a membrane material sample testing position by the secondary height adjusting knob 19 to ensure the measurement of the required strain of the membrane material sample, after the initial pretension is stabilized for a period of time, secondarily applying the required medium by the same method to load the bidirectional tensile force of the sample to a scheme value, and after the initial pretension is stabilized for a period of time, starting to record the numerical value of the extensometer; the loading medium can be selected from graded medium such as broken stone and sand particles, and standard weights required by testing can also be selected;
and fifthly, processing the time, displacement and other key data recorded by the extensometer to obtain a time-strain curve in the creep process of the membrane under each stress ratio, and realizing analysis of the creep performance of the flexible membrane under bidirectional tension load with any stress ratio and stress level, such as maximum creep displacement and the like.
Claims (9)
1. The utility model provides a testing arrangement suitable for two-way creep performance of flexible film material, includes that tension exerts system and support (9), its characterized in that: the tension applying system comprises a steel frame (1), a force transmission screw (2), a movable clamp (4), a dynamometer (3), a sleeve bolt (7), a rolling shaft joint (5), a flexible force transmission rod (6), a loading cylinder (8) and an adjustable bracket (17);
the steel frame (1) is a cross frame and is fixed above the center of the hollow quadrangular support (9), a U-shaped chute is arranged on the inner side of the steel frame (1), holes are reserved in the centers of the peripheral end parts of the frame, and graduated scales are arranged on the upper surfaces of the peripheral extension arms of the steel frame (1); the movable clamps (4) are symmetrically arranged in U-shaped sliding grooves of the extending arms on the periphery of the steel frame (1); one end of the force transmission screw rod (2) is connected with a threaded interface (10) at the end part of the movable clamp (4), the other end of the force transmission screw rod is connected with the flexible force transmission rod (6) through a sleeve bolt (7), the force transmission screw rods (2) are symmetrically arranged on a two-way axis of the steel frame (1), and the force transmission screw rods (2) in two directions are respectively provided with a dynamometer (3); a loading cylinder (8) is connected below the flexible dowel bar (6); the roller joint (5) is fixed right above the end part of the extending arm at the periphery of the steel frame (1), and the flexible dowel bar (6) passes through a roller (16) on the roller joint (5) and a hole at the end part of the steel frame (1) to be connected with the sleeve bolt (7); the adjustable support (17) is arranged below the center of the support (9).
2. The device for testing the bidirectional creep property of the flexible film according to claim 1, wherein: flexible dowel steel (6) set up around testing arrangement, including screwed joint (13), steel strand wires (14) and steel hook (15), screwed joint (13) are connected with biography power screw rod (2) through sleeve bolt (7), steel strand wires (14) and screwed joint (13) fixed connection, and steel hook (15) are fixed to be set up in steel strand wires (14) below and connect loading section of thick bamboo (8).
3. The device for testing the bidirectional creep property of the flexible film according to claim 1, wherein: the force transmission screw rod (2) is a cylindrical steel bar with threads.
4. The device for testing the bidirectional creep property of the flexible film according to claim 1, wherein: the adjustable support (17) comprises an extensometer fixing platform (18) and a height adjusting knob (19).
5. The device for testing the bidirectional creep property of the flexible film according to claim 1, wherein: the roller joint (5) comprises a roller (16), a bearing rod (24), a reinforcing rib (25) and a hollow frame (26); the hollow frame (26) is a cross-shaped hollow frame, the hollow frame is fixed right above the end part of the extending arms at the periphery of the steel frame (1) and is in meshed contact with the steel frame (1), the reinforcing ribs (25) are symmetrically fixed on two sides of one side of the hollow frame (26), the symmetrical reinforcing ribs (25) are fixedly connected with two ends of a bearing rod (24) with rollers (16), the turning transmission of load is realized through the rollers, and the height of the rollers is set to meet the horizontal force transmission of the horizontal section of the flexible force transmission rod (6).
6. The device for testing the bidirectional creep property of the flexible film according to claim 1, wherein: the dynamometer (3) is arranged on the bidirectional force transmission screw rod (2), and the change of unidirectional/bidirectional tension is recorded and observed in real time through the dynamometer (3).
7. The device for testing the bidirectional creep property of the flexible film according to claim 1, wherein: the movable clamp (4) comprises a threaded interface (10), a fixed knob (11), a pressing sheet (12), an upper clamping sheet (21), a lower clamping sheet (22) and a back plate (23); the upper clamping piece (21) and the lower clamping piece (22) are horizontally arranged in parallel, the pressing piece (12) is arranged in the center between the upper clamping piece (21) and the lower clamping piece (22), the same side edge of the upper clamping piece (21) and the lower clamping piece (22) is fixedly connected with one side of the rectangular backboard (23), a cylindrical PE rod mounting groove (20) is formed in the center line of the backboard (23) on the same side, the threaded connector (10) is fixedly arranged in the center of the other side of the backboard (23), fixing knobs (11) with threads are arranged at equal intervals in the center line of the upper clamping piece (21), and the fixing knobs (11) penetrate through the upper clamping piece (21) and are in contact with the pressing piece; the fixed knob (11) is used for rotating the jacking pressing sheet (12) to uniformly apply clamping force to the clamping end part of the membrane material; the size and the number of the fixed knobs (11) and the size of the pressing sheets (12) are determined according to the size and the actual requirement of the movable clamp (4), so that the clamping stability of the fabric membrane material in the test process is ensured.
8. The device for testing the bidirectional creep property of the flexible film according to claim 1, wherein: the shape of the membrane material sample for testing is determined by selecting a cross-shaped or rectangular sample according to a testing scheme and determining the size of the cross-shaped or rectangular sample according to the size of an actual device and testing requirements.
9. The device for testing the bidirectional creep property of the flexible film according to claim 1, wherein: the loading cylinder (8) is loaded with media, and graded media such as broken stones and sand grains are selected, or standard weights required by testing are selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010261718.1A CN111307593B (en) | 2020-04-04 | 2020-04-04 | Testing arrangement suitable for two-way creep performance of flexible membrane material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010261718.1A CN111307593B (en) | 2020-04-04 | 2020-04-04 | Testing arrangement suitable for two-way creep performance of flexible membrane material |
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| CN111307593A true CN111307593A (en) | 2020-06-19 |
| CN111307593B CN111307593B (en) | 2023-03-31 |
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| US20110174056A1 (en) * | 2008-05-08 | 2011-07-21 | Lockheed Martin Corporation | Biaxial stress, sheer, permeability, and peel test method and machine to conduct the same |
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| CN106918417A (en) * | 2017-02-27 | 2017-07-04 | 中国石油大学(华东) | Steel plate membrane stress tests force application apparatus |
| CN107976364A (en) * | 2017-11-17 | 2018-05-01 | 北方工业大学 | Testing device for realizing three-dimensional loading state and stress-strain data acquisition |
| CN108333046A (en) * | 2018-02-02 | 2018-07-27 | 江苏科技大学 | A method of it measuring the device of membrane material mechanical property and is measured using the device |
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2020
- 2020-04-04 CN CN202010261718.1A patent/CN111307593B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110174056A1 (en) * | 2008-05-08 | 2011-07-21 | Lockheed Martin Corporation | Biaxial stress, sheer, permeability, and peel test method and machine to conduct the same |
| CN101776553A (en) * | 2010-02-05 | 2010-07-14 | 河海大学 | Geosynthetic biaxial tension creep tester |
| CN205749125U (en) * | 2016-06-26 | 2016-11-30 | 上海华龙测试仪器股份有限公司 | A kind of multi-axis electronic formula universal testing machine |
| CN106918417A (en) * | 2017-02-27 | 2017-07-04 | 中国石油大学(华东) | Steel plate membrane stress tests force application apparatus |
| CN106896022A (en) * | 2017-05-11 | 2017-06-27 | 鲁东大学 | A kind of simulation thin film material plane and the experimental rig of quadric stress relexation |
| CN107976364A (en) * | 2017-11-17 | 2018-05-01 | 北方工业大学 | Testing device for realizing three-dimensional loading state and stress-strain data acquisition |
| CN108333046A (en) * | 2018-02-02 | 2018-07-27 | 江苏科技大学 | A method of it measuring the device of membrane material mechanical property and is measured using the device |
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| CN111307593B (en) | 2023-03-31 |
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