CN201199211Y - Tensile test apparatus for cruciform test piece - Google Patents
Tensile test apparatus for cruciform test piece Download PDFInfo
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- CN201199211Y CN201199211Y CNU2008200288752U CN200820028875U CN201199211Y CN 201199211 Y CN201199211 Y CN 201199211Y CN U2008200288752 U CNU2008200288752 U CN U2008200288752U CN 200820028875 U CN200820028875 U CN 200820028875U CN 201199211 Y CN201199211 Y CN 201199211Y
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Abstract
The utility model relates to a stretching test device used for a crisscross test piece, which comprises a fixed force dividing mechanism (32), an adjustable force dividing mechanism (34), a measurable force transferring mechanism (31) and an immeasurable force transferring mechanism (33) which are fixedly connected with the four directions of a test piece (14) by a test-piece chuck (2) and a test-piece chuck (16) respectively so as to stretch the test piece; the fixed force dividing mechanism and the measurable force transferring mechanism are provided with a force sensor (4) respectively; bearings (20) at two ends of the force transferring mechanisms slide on the side surface of a force dividing arm (5); when the stretching test device is arranged on a universal testing machine or a pressure testing machine, a supporting plate (10) of the measurable force transferring mechanism is used for realizing a stretching movement with different longitudinal and horizontal proportions, thereby being capable of describing the deformation of the test piece in the whole range from unidirectional stretching to bidirectional equal stretching and having advantages of light and handy structure, low cost and easy operation.
Description
One, technical field
The present invention relates to the material test technical field, a kind of specifically tensile test apparatus that is used for cruciform specimen.
Two, background technology
Since Plate Theory is set up, used the plate and shell structure of bidirectional stress in the world in a large number.At that time, because the space container of complexity of calculation, particularly aerospace aspect all belongs to " bidirectional stress structure ", many people were devoted to seek " biaxial tensile test method ".At present, " biaxial tensile test " is the problem of fine solution not as yet in the world.The biaxial tensile test method is a lot, and wherein cruciform specimen is two draws test the most directly perceived, can directly reflect the biaxial stress state of plate shell, is the most valued at present a kind of method.
At present, the cross test specimen is two draws test unit to mainly contain two kinds.A kind of is to be fixedly mounted on universal testing machine or the pressure testing machine, provides pulling force by universal testing machine or pressure testing machine, realizes the two-way stretch to test specimen.But this tensile test apparatus can only realize that two-way grade is drawn or two-way certainty ratio stretches, and can not describe from unilateral stretching to two-way grade and draw gamut to be out of shape situation; Another kind is to do that cross-piece is two to draw the large-scale specialized equipment of test, can realize that two-way control with changed scale stretches.But its complex structure costs an arm and a leg, and small-sized scientific research institution and universities and colleges laboratory etc. is difficult to accept economically, is unfavorable for development of scientific research.
At publication number is in the utility model patent of CN87205653, discloses a kind of mechanical biaxial tension tester.This test instrument utilizes cross loading head that a top is equipped with Universal-head, and the hounds of symmetry are hinged mutually with four respectively by four hinges, the lower end of each hound is hinged with strain-type force sensor respectively again by hinge, needs by different biaxial stress ratios, the length of selected hound, make it become certain included angle with force cell, the outside end of strain-type force sensor has the guide pole that passes cross supporting frame end support plate, be with a buffer spring on the guide pole, each force cell lower end has a vertical groove, between each groove and the cross base, the roller that is supporting force cell and it is slided before and after can be on the cross base is arranged all; A force cell end inwards is the test specimen chuck; Force cell links by dress connection plug and dynamic strain indicator thereon.But the data that the buffer spring of this test instrument has caused force cell to record are less than normal, and its structure is more complicated also.
Three, summary of the invention
In order to solve that existing two-way stretch device exists or can only to realize two-way etc. draw or two-way certainty ratio stretches, perhaps complex structure, cost an arm and a leg, deficiency that data are inaccurate, the present invention proposes a kind of tensile test apparatus that is used for cruciform specimen.
But the present invention includes the fixing force mechanisms, adjustable minute force mechanisms dynamometry force transmission mechanism and can not the dynamometry force transmission mechanism of dividing.Cruciform specimen is placed the center of device, but fixing divide a force mechanisms, adjustable minute force mechanisms dynamometry force transmission mechanism and can not fixedly connected with the four direction of cruciform specimen by the test specimen chuck respectively by the dynamometry force transmission mechanism, cruciform specimen enforcement stretching.Fixing divide on the vertical axis that force mechanisms and adjustable minute force mechanisms be positioned at cruciform specimen and be symmetrical in cruciform specimen; But dynamometry force transmission mechanism and can not the dynamometry force transmission mechanism be positioned on the horizontal axis of cruciform specimen and also be symmetrical in cruciform specimen.
Fixing force mechanisms and adjustable minute force mechanisms of dividing includes test specimen chuck, short screw, two the branch arm of forces, bearing pin, nut, fixed block, stretching clamp holder and bearing pins 11.The fixing force mechanisms that divides also includes force transducer and a back up pad, and the two ends of this back up pad flexibly connect by bearing pin and the fixing end of force mechanisms component arm that divides respectively; Force transducer is positioned at fixing the branch on the force mechanisms; The stretching clamp holder is packed into and is arranged in mounting hole on the fixed block, and an end passes fixed block and is connected with force transducer.One end of two branch arm of forces flexibly connects with fixed block respectively; The test specimen chuck is positioned among the two layers of support board spacing.Force mechanisms also included two back up pads in adjustable minute, and an end of two back up pads with flexibly connect with an end of minute arm of force respectively, the other end cooperates with the test specimen chuck that is positioned at adjustable minute force mechanisms center; The other end of two branch arm of forces is connected with fixed block respectively; The stretching clamp holder of adjustable minute force mechanisms is also packed into and is arranged in mounting hole on the fixed block, and an end passes fixed block and is connected with the test specimen chuck;
But can not mainly form with the dynamometry force transmission mechanism by the dynamometry force transmission mechanism by power transmission arm, test specimen chuck, threaded rod, nut; But the dynamometry force transmission mechanism also comprises the sensor that two ends link to each other with threaded rod with short screw respectively.Can not comprise threaded rod by the dynamometry force transmission mechanism, test specimen chuck and threaded rod are welded as a whole; One end of threaded rod is connected with the power transmission arm, and the other end is connected with the test specimen chuck.But force transducer is positioned on the dynamometry force transmission mechanism, and two ends link to each other with threaded rod with short screw respectively; Test specimen chuck and short screw are welded as a whole; Bearing is positioned at the two ends of power transmission arm, and this bearing is that track slides with the side of minute arm of force, is converted into the transverse movement vertical with the draw direction of testing machine thereby will fix the lengthwise movement that the stretching clamp holder on the branch force mechanisms done.According to testing requirements, the back up pads of the many groups of making different lengths change the vertical and horizontal load ratio of being born of test specimen by changing back up pad, thereby realize the stretching displacement of test specimen at the vertical and horizontal different proportion.
The present invention is installed on universal testing machine or the pressure testing machine, can realize the stretching displacement of cruciform specimen vertical and horizontal different proportion by back up pad for adjustable minute force mechanisms installation different length, thereby can describe test specimen and draw gamut distortion situation from unilateral stretching to two-way grade, realize reflecting truly sheet forming situation to draw.The present invention compares with existing general bidirectional tensile tester, and it is light and handy to have structure, and cost is low, the characteristics that operation is simple.
Four, description of drawings
Accompanying drawing 1 is the structural representation that is used for the tensile test apparatus of cruciform specimen;
Accompanying drawing 3 is fixing structural representations that divide force mechanisms, and wherein a figure is the fixing force mechanisms front view that divides, and b figure is the fixing force mechanisms upward view that divides, and figure c is the fixing force mechanisms vertical view that divides;
Accompanying drawing 4 is structural representations of adjustable minute force mechanisms, and wherein a figure is adjustable minute force mechanisms front view, and b figure is that adjustable minute force mechanisms B is to view;
Accompanying drawing 7 is test specimen chuck 2 structural representations;
Accompanying drawing 8 is test specimen chuck 16 structural representations.Among the figure:
1. power transmission arm 2. test specimen chucks 3. short screws 4. force transducers
5. divide the arm of force 6. bearing pins 7. nuts 8. fixed blocks
9. stretching clamp holder 10. back up pads 11. bearing pins 12. threaded rods
13. nut 14. cruciform specimens 15. stretching clamp holders 16. test specimen chucks
17. 19. 20. bearings of back up pad 18. threaded rods
21. force transmitting board 22.H shape welding block 23. threaded rod mounting holes 24. stretching clamp holder mounting holes
25. bearing pin mounting hole 26. test specimen pads 27. bolts 28. chuck bodies
29. but the bearing pin mounting hole 30. chuck bodies 31. dynamometry force transmission mechanisms 32. fixing force mechanisms that divide
33. can not 34. adjustable minutes force mechanisms of dynamometry force transmission mechanism
Five, embodiment
Present embodiment is the tensile test apparatus that is used for cruciform specimen, but comprises the fixing force mechanisms 32, adjustable minute force mechanisms 34 dynamometry force transmission mechanism 31 and can not dynamometry force transmission mechanism 33 of dividing.Cruciform specimen 14 is placed the center of device, but fixing divide a force mechanisms 32, adjustable minute force mechanisms 34 dynamometry force transmission mechanism 31 and can not fixedly connected with the four direction of cruciform specimen 14 by the test specimen chuck respectively by dynamometry force transmission mechanism 33, cruciform specimen 14 enforcement stretchings.Fixing divide on the vertical axis that force mechanisms 32 and adjustable minute force mechanisms 34 be positioned at cruciform specimen and be symmetrical in this test specimen; But dynamometry force transmission mechanism 31 and can not dynamometry force transmission mechanism 33 be positioned on the horizontal axis of cruciform specimen and also be symmetrical in this test specimen.
In concrete the enforcement:
Fixing force mechanisms 32 and the adjustable minute force mechanisms 34 of dividing includes test specimen chuck 2, short screw 3, two the branch arm of forces 5, bearing pin 6, nut 7, fixed block 8, stretching clamp holder and bearing pins 11.The fixing force mechanisms 32 that divides also includes force transducer 4 and a back up pad 10, and there is the hole that cooperates with bearing pin 11 at the two ends of this back up pad; Force mechanisms 34 also included two back up pads in adjustable minute, and an end of two back up pads 17 with flexibly connect with an end of minute arm of force 5 respectively, the other end cooperates with the test specimen chuck 16 that is positioned at adjustable minute force mechanisms center; The other end of two branch arm of forces is connected with fixed block respectively;
Divide the arm of force 5 and back up pad 10 all to make with the 45# steel is modified, basic configuration is a strip, and two ends all have with the footpath pin shaft hole.Divide the arm of force 5 one ends to be connected with fixed block 8 respectively, the other end is connected by bearing pin 11 with an end of back up pad 10 respectively; Divide the angle of the arm of force 5 and back up pad 10 to be 45～60 degree.Back up pad 10 has two-layer, and symmetry is positioned at the branch arm of force 5 both sides, and test specimen chuck 2 is (Fig. 3-c) between back up pad two tame interlayers.
Modified the making of fixed block 8 usefulness 45# steel, the middle part is square, the both sides at these square block two ends have extended square connecting plate respectively, make the outer just as " H " shape of fixed block 8; There is the mounting hole 24 of stretching clamp holder 9 at the center at fixed block 8 middle parts, and the bearing pin mounting hole 25 of perforation is arranged respectively on the web joint of both sides, two ends, and the internal diameter in this hole is with the pin-and-hole diameter (Fig. 6) that divides on the arm of force 5.Stretching clamp holder 9 is cylindric, and an end has screw thread, is used to install nut 7 and is connected force transducer 4 (Fig. 3-a).
Assembling is fixing when dividing force mechanisms 32, and the threaded hole of force transducer 4 one ends is linked to each other with short screw 3; Stretching clamp holder 9 is fit in the stretching clamp holder mounting hole 24 of fixed block 8, makes an end of stretching clamp holder 9 pass fixed block 8 and is connected with force transducer 4; For preventing fixed block 8 landings, nut 7 (Fig. 3-a) is housed on the stretching clamp holder 9 between fixed block 8 and the force transducer 4.One end of fixed block 8 and two branch arm of forces 5 is connected by bearing pin 6; The other end of back up pad 10 and two branch arm of forces 5 is connected (Fig. 3-c) by bearing pin 11; Test specimen chuck 2 is positioned among two layers of support board 10 spacings (Fig. 3-b).Loading is to stretching clamp holder 9, and force transducer 4 can be measured load capacity.
But dynamometry force transmission mechanism 31 and can not include power transmission arm 1, test specimen chuck 2 and nut 13 by dynamometry force transmission mechanism 33.But dynamometry force transmission mechanism 31 also comprises the sensor 4 that two ends link to each other with threaded rod 18 with short screw 3 respectively, can not comprise threaded rod 12 by dynamometry force transmission mechanism 33.
Power transmission arm 1 is structure is identical, direction is symmetrical two, comprises the welding block 22 (Fig. 5) of axle 19, bearing 20, force transmitting board 21, H shape.Modified the making of H shape welding block 22 usefulness 45# steel, there is threaded rod mounting hole 23 at its middle part, and threaded rod 12 and threaded rod 18 pass this mounting hole respectively, and power transmission arm 1 is connected with test specimen chuck 2; The width of H shape welding block 22 should satisfy the installation requirement of bearing 20.The identical force transmitting board 21 of two block structures symmetries is welded together, during welding, with the straight arm section at force transmitting board 21 middle parts respectively with two surface-welding of H shape welding block 22 symmetries; The middle part of force transmitting board 21 is a straight-arm, and two ends make profile be similar to " recessed " font for being 45 oblique arms of spending, also tilting laterally with the middle part straight-arm; At the two ends of each force transmitting board 21 oblique arm, bearing 20 mounting holes are respectively arranged, and clamping plate that protrude are all arranged at the two ends of each force transmitting board 21 oblique arm, its profile and size should be greater than the radiuses of bearing 20, and can contact with the surface of minute arm of force 5 after assembling.
But during assembling dynamometry force transmission mechanism 31, the short screw 3 of force transducer 4 one ends is welded as a whole with test specimen chuck 2, the threaded rod 18 of force transducer 4 other ends penetrates in the threaded rod mounting hole 23 at power transmission arm 1 middle part, and fixing with nut 13, can measure the transverse load amount of cruciform specimen 14 by force transducer 4.The outstanding clamping plate in force transmitting board 21 two ends contact with the surface of dividing the arm of force 5; and will divide the arm of force 5 to clamp by these clamping plate; making bearing 12 can be that track normally slides with the side of minute arm of force 5, thereby fixedly the lengthwise movement done of the structural stretching clamp holder 9 of component is converted into the transverse movement vertical with the draw direction of testing machine (Fig. 1).
But can not be positioned on the plane of symmetry of dynamometry force transmission mechanism 31 by dynamometry force transmission mechanism 33.When assembling can not dynamometry force transmission mechanism 33, be installed to bearing 20 on the mounting hole of force transmitting board 21 by axle 19; Power transmission arm 1 is enclosed within on the threaded rod 12 by the threaded rod mounting hole 23 in the middle of the H shape welding block 22, and nut 13 is installed on the threaded rod 12, with fixing force transfer arm 1; The outstanding clamping plate in force transmitting board 21 two ends contact with the surface of dividing the arm of force 5; and will divide the arm of force 5 to clamp by these clamping plate; making bearing 12 can be that track normally slides with the side of minute arm of force 5, thereby fixedly the lengthwise movement done of the structural stretching clamp holder 9 of component is converted into the transverse movement vertical with the draw direction of testing machine (Fig. 1).Test specimen chuck 2 is welded as a whole with threaded rod 12; Modified the making of threaded rod 12 usefulness 45# steel; Nut 13 is enclosed within on the threaded rod 12, is used for fixing power transmission arm 1 (Fig. 2).
After the making on finish, present embodiment is installed on the universal testing machine, the clamp holder 9 that wherein stretches is installed on the testing machine moveable jaws, and stretching clamp holder 16 is installed on the testing machine regular jaw.Starting characteristics test machine, moveable jaws drive stretching clamp holder 9 and travel longitudinally, thereby drive the branch arm of force 5 lengthwise movements on the fixing component structure 32, make test specimen 14 make longitudinal stretching and move.Motion along with minute arm of force 5, bearing 20 on the power transmission arm 1 begins to roll, it is increasing that power transmission arm 1 is subjected to load, thereby fixedly the lengthwise movement done of the stretching clamp holder 9 on the component structure 32 is converted into the transverse movement vertical with the draw direction of testing machine, promptly realizes the two-way stretch to cruciform specimen 14.
Present embodiment is in stretching experiment, back up pad 17 by the transposing different length is regulated 14 liang of load ratios that vertical direction applied of test specimen, realize the stretching displacement of test specimen vertical and horizontal different proportion, draw gamut to be out of shape situation thereby can describe from unilateral stretching to two-way grade.
Claims (5)
1. tensile test apparatus that is used for cruciform specimen, comprise test specimen chuck, force transducer and drawing mechanism, cruciform specimen is placed the center of device, drawing mechanism is fixedlyed connected with the four direction of test specimen by the test specimen chuck respectively, test specimen is implemented to stretch, it is characterized in that:
A. drawing mechanism comprises and fixing divides a force mechanisms (32), adjustable minute force mechanisms (34) but dynamometry force transmission mechanism (31) and can not dynamometry force transmission mechanism (33); Fixing divide force mechanisms (32) and adjustable minute force mechanisms (34) be positioned on the vertical axis of test specimen (14) and be symmetrical in test specimen (14), but dynamometry force transmission mechanism (31) and can not being positioned on the horizontal axis of test specimen (14) by dynamometry force transmission mechanism (34) also is symmetrical in test specimen (14);
B. adjustable minute force mechanisms (34) and the fixing force mechanisms (32) that divides comprise short screw (3), force transducer (4), the branch arm of force (5), bearing pin (6), bearing pin (11), nut (7), fixed block (8), stretching clamp holder (9), stretching clamp holder (15), test specimen chuck (2) and test specimen chuck (16); The fixing force mechanisms (32) that divides also includes a force transducer (4) and a back up pad (10), and there is the hole that cooperates with bearing pin (11) at the two ends of this back up pad; Adjustable minute force mechanisms (34) also include the back up pad (17) that is divided into two from the centre, and all there is the hole that cooperates with bearing pin and test specimen chuck (2) at the two ends of two back up pads; Be connected with force transducer (4) the fixing branch on the force mechanisms (32); Stretching clamp holder (9) is packed into and is arranged in upward mounting hole of fixed block (8), and an end passes fixed block (8) and is connected with force transducer (4); The two ends of two branch arm of forces (5) flexibly connect with an end of fixed block (8) and back up pad (10) respectively; Test specimen chuck (2) is positioned among two layers of support board (10) spacing; Adjustable minute force mechanisms (34) stretching clamp holder (15) also pack into and be arranged in mounting hole on the fixed block (8), an end passes fixed block (8) and is connected with test specimen chuck (16); One end of two branch arm of forces (5) is connected with fixed block (8) respectively, and the other end flexibly connects with an end of back up pad (17) respectively, and the other end of back up pad (17) is connected with test specimen chuck (16) respectively;
C. can not dynamometry force transmission mechanism (33) and dynamometry force transmission mechanism (31) mainly comprise power transmission arm (1), test specimen chuck (2), threaded rod (12), threaded rod (18), nut (13) and force transducer (4); Test specimen chuck (2) is welded as a whole with threaded rod (12); One end of threaded rod (12) is connected with power transmission arm (1), and the other end is connected with test specimen chuck (2); Force transducer (4) but be positioned on the dynamometry force transmission mechanism (31), two ends link to each other with threaded rod (18) with short screw (3) respectively; Test specimen chuck (2) is welded as a whole with short screw (3); Bearing (20) is positioned at the two ends of power transmission arm (1), and this bearing is that track slides with the side of a minute arm of force (5).
2. the tensile test apparatus that is used for cruciform specimen according to claim 1 is characterized in that the branch arm of force (5) one ends are connected with fixed block (8) respectively, and the other end leads to an end of back up pad (10) respectively and connects; Dividing the angle between the arm of force (5) and the back up pad (10) is 45～60 degree.。
3. the tensile test apparatus that is used for cruciform specimen according to claim 1 is characterized in that described power transmission arm (1) comprises axle (19), bearing (20), force transmitting board (21) and welding block (22); There is threaded rod mounting hole (23) at welding block (22) middle part, two surface-welding that the straight arm section at force transmitting board (21) middle part is symmetrical with H shape welding block (22) respectively; The middle part of force transmitting board (21) is a straight-arm, two ends are for being 45 oblique arms of spending, also tilting laterally with the middle part straight-arm, two ends at each force transmitting board (21) oblique arm, a bearing (20) mounting hole is respectively arranged, and at the two ends of each force transmitting board (21) oblique arm one clamping plate that protrude are arranged all, these clamping plate contact with the both side surface of dividing the arm of force (5).
4. the tensile test apparatus that is used for cruciform specimen according to claim 1 is characterized in that test specimen chuck (2) comprises chuck body (30) and test specimen pad (26); Chuck body (30) one ends have boss; Cruciform specimen (14) one ends are positioned between test specimen pad (26) and the chuck body (30) and fix.
5. as being used for the tensile test apparatus of cruciform specimen as described in the claim 3, it is characterized in that test specimen chuck (16) comprises chuck body (28), bolt (27) and test specimen pad (26), it is characterized in that bearing pin mounting hole (29) is arranged on its boss, be connected with back up pad (17) by bearing pin (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200288752U CN201199211Y (en) | 2008-04-17 | 2008-04-17 | Tensile test apparatus for cruciform test piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200288752U CN201199211Y (en) | 2008-04-17 | 2008-04-17 | Tensile test apparatus for cruciform test piece |
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| Publication Number | Publication Date |
|---|---|
| CN201199211Y true CN201199211Y (en) | 2009-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200288752U Expired - Fee Related CN201199211Y (en) | 2008-04-17 | 2008-04-17 | Tensile test apparatus for cruciform test piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201199211Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893532A (en) * | 2010-07-28 | 2010-11-24 | 哈尔滨工业大学 | Three-dimensional cross-shaped biaxial tension test piece |
| CN102832757A (en) * | 2012-09-10 | 2012-12-19 | 杭州米格电机有限公司 | Mounting device for synchronous wheel of motor |
| CN103136991A (en) * | 2011-11-28 | 2013-06-05 | 南京航空航天大学 | Combined tensile experimental device |
| CN103604872A (en) * | 2013-11-21 | 2014-02-26 | 三峡大学 | Crack expansion acoustic emission test device and method |
| CN106644720A (en) * | 2016-12-27 | 2017-05-10 | 重庆大学 | Biaxial stretching device for realizing adjustable stress and strain ratio based on unidirectional testing machine |
| EP3438640A4 (en) * | 2016-03-28 | 2020-02-26 | Mitsubishi Heavy Industries, Ltd. | Biaxial load test body, biaxial load testing device, and biaxial load testing method |
| CN111707551A (en) * | 2020-06-30 | 2020-09-25 | 胡兰涛 | Fabric stretch resistance testing equipment |
| CN114397176A (en) * | 2022-01-07 | 2022-04-26 | 广西大学 | Cross loading fatigue test fixture with adjustable steering load ratio |
-
2008
- 2008-04-17 CN CNU2008200288752U patent/CN201199211Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893532B (en) * | 2010-07-28 | 2012-04-18 | 哈尔滨工业大学 | Three-dimensional cross-shaped biaxial tension test piece |
| CN101893532A (en) * | 2010-07-28 | 2010-11-24 | 哈尔滨工业大学 | Three-dimensional cross-shaped biaxial tension test piece |
| CN103136991A (en) * | 2011-11-28 | 2013-06-05 | 南京航空航天大学 | Combined tensile experimental device |
| CN102832757B (en) * | 2012-09-10 | 2015-04-22 | 杭州米格电机有限公司 | Mounting device for synchronous wheel of motor |
| CN102832757A (en) * | 2012-09-10 | 2012-12-19 | 杭州米格电机有限公司 | Mounting device for synchronous wheel of motor |
| CN103604872B (en) * | 2013-11-21 | 2016-06-15 | 三峡大学 | Crack expansion acoustic emission method |
| CN103604872A (en) * | 2013-11-21 | 2014-02-26 | 三峡大学 | Crack expansion acoustic emission test device and method |
| EP3438640A4 (en) * | 2016-03-28 | 2020-02-26 | Mitsubishi Heavy Industries, Ltd. | Biaxial load test body, biaxial load testing device, and biaxial load testing method |
| US10859478B2 (en) | 2016-03-28 | 2020-12-08 | Mitsubishi Heavy Industries, Ltd. | Biaxial load test specimen, biaxial load test apparatus, and biaxial load test method |
| CN106644720A (en) * | 2016-12-27 | 2017-05-10 | 重庆大学 | Biaxial stretching device for realizing adjustable stress and strain ratio based on unidirectional testing machine |
| CN111707551A (en) * | 2020-06-30 | 2020-09-25 | 胡兰涛 | Fabric stretch resistance testing equipment |
| CN114397176A (en) * | 2022-01-07 | 2022-04-26 | 广西大学 | Cross loading fatigue test fixture with adjustable steering load ratio |
| CN114397176B (en) * | 2022-01-07 | 2023-08-01 | 广西大学 | Cross loading fatigue test fixture with adjustable steering load ratio |
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| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
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Granted publication date: 20090225 Termination date: 20130417 |