CN101504342B - Microscopic thin film material mechanics dual-spindle testing bench - Google Patents
Microscopic thin film material mechanics dual-spindle testing bench Download PDFInfo
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- CN101504342B CN101504342B CN2009100766503A CN200910076650A CN101504342B CN 101504342 B CN101504342 B CN 101504342B CN 2009100766503 A CN2009100766503 A CN 2009100766503A CN 200910076650 A CN200910076650 A CN 200910076650A CN 101504342 B CN101504342 B CN 101504342B
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Abstract
The invention belongs to the field of material mechanics testing equipment and in particular relates to a test bed for a biaxial test of microcosmic film material mechanics. The test bed has the following structure that: the sidewall of a rectangular box body is provided with two screw rods of which different surfaces are vertical with each other; two sides of each screw rod are provided with a guide rail parallel to the screw rod respectively; two ends of the screw rod pass through the sidewall of the box body; one end of the screw rod is fixed by double nuts; the other end of the screw rod is provided with a handwheel; two slide blocks are arranged on each screw rod respectively; and each slide block is connected with a clamp through a force sensor. The test bed can apply different biaxial stress on a film material, can be placed in a temperature box to research the mechanical behavior of the film material at different temperatures and has a simple structure and convenient use.
Description
Technical field
The invention belongs to mechanics of materials testing apparatus field, the particularly a kind of microscopic thin film material mechanics dual-spindle testing bench that can test the fracture failure pattern of membraneous material under the varying environment under biaxial stress state.
Background technology
Membraneous material is a kind of the rise in the new material of the seventies in last century six, its kind diverse in function, and some membraneous materials are heat insulation, sealing, radiation proof, other materials is irreplaceable especially for characteristic such as anti-oxidant.At present, membraneous material has been widely applied to the spacecraft thermal control, building, and textile industry, microelectronics, photoelectron industry, the sun power utilization, packaging for foodstuff and fresh-keeping in a lot of fields of auto industry or the like, is just being brought into play more and more important effect.Day by day extensive along with what use, the boundary of subject has been broken in the development research of membraneous material, become the emphasis of domestic and international research, its Mechanical Properties then is the prerequisite and the basis of membrane structure development research.
In manufacture process, for example be that other thin polymer films are stacked during, a lot of materials will stand to heat cool cycles, it can be similar to becomes two-dimensional state of stress.In addition, automobile is dazzled with anti-, and membraneous materials such as anti-mist are with glass heat when molded, and the operation of being carried out nearly all is a biaxial stress state, and membrane structure is very easily destroyed and caused losing efficacy in this process.We can say that the reliability of membraneous material depends on the mechanical behavior of coating and substrate to a great extent, particularly the initial stress of membraneous material fragmentation.And the rupture process of stress transmission at this moment and single shaft is different, thereby its destructive process that causes also may be different.So the result who is obtained by conventional burst test analysis can not well reflect the mechanical property of material in actual manufacture process.Therefore the mechanical characteristic, the particularly research of the strength characteristics under the biaxial stress effect to membraneous material is necessary.
Y. people (JOURNAL OF MATERIALS SCIENCE such as LETERRIER, 2001, Vol.36:2213-2225) She Ji Film test machine precision is very high, the broken pattern of easy observed and recorded film coating, but corresponding its cost is very high, can only be specially experimentize, and extended state is more single, can only finish and wait the axle stretching to some thin test specimen.
The patent No. is that the film drawer of 200620158423.7 static comb principle can not be regulated neutrality, is exactly disabled for the material that large deformation is arranged a little, because what produce is not the biaxial stress of quadrature just.The pulling force of Chan Shenging can be very not big yet in addition.
The patent No. is 87205653 mechanical type twin shaft tension test instrument, builds on universal testing machine and uses, and can not load independently, is subjected to certain restriction, and it can only finish the stretching of the twin shaft ratio of fixing 1: 1, and non-adjustable.
The patent No. is that 03127674.1 design is control able to programme, and its cost is higher relatively, and can only be limited to film and stretch, and is then inapplicable for thicker testing of materials.
The patent No. is that 200520067081.3 project organization is complicated, and also has the problem to neutrality, sample dimensions is required excessive, is not easy to study the situation of microcosmic small scale.
Above-mentioned equipment all can not be placed on the test of carrying out in the middle of the environmental cabinet under the high low temperature condition.
Summary of the invention
The present invention is directed to existing equipment and the technology deficiency when film being carried out biaxial stretch-formed test, a kind of microscopic thin film material mechanics dual-spindle testing bench is provided, it is characterized in that, two not vertical at grade last leading screws 31 and following leading screw 32 are separately fixed on the top and bottom sidewall and left and right sides sidewall of casing 9, a parallel with it upper rail 41 is respectively settled in the both sides of last leading screw 31, and a parallel with it lower guideway 42 is respectively settled in the both sides of following leading screw 32; The top and bottom sidewall and the left and right sides sidewall of casing 9 passed at the two ends of last leading screw 31 and following leading screw 32 respectively, and an end is fixing with double nut 8, and the other end is installed handwheel 7 and fixing with double nut 8; Two top shoes 11 are installed on last leading screw 31, two sliding blocks 12 are installed on the following leading screw 32; Each top shoe 11 all respectively is connected anchor clamps 6 by force transducer 5 with sliding block 12.
Described top shoe 11 two ends are placed on the upper rail 41, do radial motion along upper rail 41; Described sliding block 12 two ends are placed on the lower guideway 42, do radial motion along lower guideway 42.
Described go up leading screw 31 and following leading screw 32 stage casings smooth, and be symmetric points with the center of leading screw smooth section, both sides process left-handed respectively and the dextrorotation fine thread, the top shoe 11 or the sliding block 12 that are enclosed within the relevant position when making the leading screw rotation can counter motions.
The effect of described double nut 8 is that restriction is gone up leading screw 31 and do not slided with following leading screw 32 relative casings 9, and by regulating the position of double nut 8, test begin before adjusting to neutrality.
Described handwheel 7 is a spanner loading blocks formula handwheel, is fixed on the leading screw by pin, and the degree of regulation of handwheel 7 is 3～10 μ m.
The quantity of described anchor clamps 6 is 4, and on same surface level.
Beneficial effect of the present invention is: can apply different biaxial stresses to membraneous material, and can place sweat box that membraneous material is studied at the mechanical behavior under the different temperatures.In order to study the feasibility of this device, utilize this device that the nitrocellulose membrane on the rubber substrate is studied than the behavior of breaking of situation two-dimensional state of stress at different pulling force, studies show that, this device can realize that reliable and stable twin shaft loads, and can control biaxiality easily, and obtain the film breaks pattern under the different stress ratios.
Description of drawings
Fig. 1 is a test platform structure synoptic diagram of the present invention;
Fig. 2 is the handwheel structural representation;
Fig. 3 is the small-load sensor structural representation;
Fig. 4 is big load transducer structural representation;
Fig. 5 is the clamp structure synoptic diagram;
Number in the figure:
The 11-top shoe; The 12-sliding block; The last leading screw of 31-; Leading screw under the 32-; The 41-upper rail; The 42-lower guideway; The 5-force transducer; The 6-anchor clamps; The 61-jig main body; The 62-pad; The 63-spring; The 64-fixed screw; 65-steps up screw; The 7-handwheel; The 8-double nut; The 9-casing.
Embodiment
The invention provides a kind of microscopic thin film material mechanics dual-spindle testing bench, the present invention will be further described below by description of drawings and embodiment.
Two not vertical at grade last leading screws 31 and following leading screw 32 are separately fixed on the top and bottom sidewall and left and right sides sidewall of casing 9, smooth in the middle of last leading screw 31 and the following leading screw 32, and be symmetric points with the center of leading screw smooth section, both sides process left-handed and dextrorotation fine thread respectively, and being enclosed within the top shoe 11 of relevant position or sliding block 12 when leading screw is rotated can counter motion; A parallel with it upper rail 41 is respectively settled in the both sides of last leading screw 31, and a parallel with it lower guideway 42 is respectively settled in the both sides of following leading screw 32;
Two top shoes 11 are installed on last leading screw 31, two sliding blocks 12 are installed on the following leading screw 32; Top shoe 11 two ends are placed on the upper rail 41, do radial motion along upper rail 41; Sliding block 12 two ends are placed on the lower guideway 42, do radial motion along lower guideway 42
The top and bottom sidewall and the left and right sides sidewall of casing 9 passed at the two ends of last leading screw 31 and following leading screw 32 respectively, and be at one end fixing with double nut 8, and the other end is installed handwheel 7 and fixing with double nut 8; The effect of double nut 8 is that restriction is gone up leading screw 31 and do not slided with following leading screw 32 relative casings 9, and by regulating the position of double nut 8, test begin before adjusting to neutrality; Handwheel 7 is a spanner loading blocks formula handwheel, is fixed on the leading screw by pin, can manually or use spanner to realize loading; Be carved with 300 mean lines on handwheel 7 circumference, fine thread pitch is 1.5mm on the leading screw, so handwheel rotates corresponding each slide block of every little lattice and moves 5 μ m distances.
Each top shoe 11 all respectively is connected anchor clamps 6 by force transducer 5 with sliding block 12.
Big load transducer as shown in Figure 4.Patch location is at 4-5,4-6 and 4-7 overleaf, 4-8.When the sensor tension, the foil gauge pressurized of 4-5,4-7 position is connected on a pair of on the arm of Huygens's electric bridge, the foil gauge tension of 4-6,4-8 position, and another that is connected on Huygens's electric bridge formed full-bridge to on the arm.
Fig. 5 is the clamp structure synoptic diagram.Anchor clamps are by main body 61, and 64, one loading and unloading of 63, two fixed screws of 62, two springs of pad test specimen steps up screw 65 and forms.When being installed test specimen, nut 65 is unclamped, pad 62 is upspring under the effect of spring 63, puts into test specimen, with hexagonal spiral shell twisting jack panel 65, pushes down following pad, clamps test specimen.The surface of contact of pad and test specimen is carved with the striped vertical with direction of pull, increases friction force.
Claims (6)
1. microscopic thin film material mechanics dual-spindle testing bench, it is characterized in that, not vertical at grade last leading screw (31) and following leading screw (32) are separately fixed on the top and bottom sidewall and left and right sides sidewall of casing (9), a parallel with it upper rail (41) is respectively settled in the both sides of last leading screw (31), and a parallel with it lower guideway (42) is respectively settled in the both sides of following leading screw (32); The top and bottom sidewall and the left and right sides sidewall of casing (9) passed at the two ends of last leading screw (31) and following leading screw (32) respectively, and an end is fixing with double nut (8), and the other end is installed handwheel (7) and fixing with double nut (8); Go up installation two top shoes (11) at last leading screw (31), following leading screw (32) is gone up two sliding blocks (12) is installed; Each top shoe (11) all respectively is connected anchor clamps (6) by force transducer (5) with sliding block (12).
2. microscopic thin film material mechanics dual-spindle testing bench according to claim 1 is characterized in that, described top shoe (11) two ends are placed on the upper rail (41), do radial motion along upper rail (41); Described sliding block (12) two ends are placed on the lower guideway (42), do radial motion along lower guideway (42).
3. microscopic thin film material mechanics dual-spindle testing bench according to claim 1, it is characterized in that, described upward leading screw (31) and following leading screw (32) stage casing are smooth, and be symmetric points with the center of leading screw smooth section, both sides process left-handed respectively and the dextrorotation fine thread, and the top shoe (11) or the sliding block (12) that are enclosed within the relevant position when leading screw is rotated can counter motions.
4. microscopic thin film material mechanics dual-spindle testing bench according to claim 1, it is characterized in that, the effect of described double nut (8) is that the last leading screw (31) of restriction does not slide with the relative casing of following leading screw (32) (9), and, before the experiment beginning, regulate neutrality by regulating the position of double nut (8).
5. microscopic thin film material mechanics dual-spindle testing bench according to claim 1 is characterized in that, described handwheel (7) is a spanner loading blocks formula handwheel, is fixed on the leading screw by pin, and the degree of regulation of handwheel (7) is 3～10 μ m.
6. microscopic thin film material mechanics dual-spindle testing bench according to claim 1 is characterized in that, the quantity of described anchor clamps (6) is 4, and on same surface level.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100766503A CN101504342B (en) | 2009-01-12 | 2009-01-12 | Microscopic thin film material mechanics dual-spindle testing bench |
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| CN2009100766503A CN101504342B (en) | 2009-01-12 | 2009-01-12 | Microscopic thin film material mechanics dual-spindle testing bench |
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| CN101504342B true CN101504342B (en) | 2011-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102879267A (en) * | 2012-09-18 | 2013-01-16 | 华南理工大学 | Unilateral plastic film stretching test method and device based on constant strain rate |
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| CN102259313A (en) * | 2010-12-20 | 2011-11-30 | 吴江市博众精工科技有限公司 | Clamp locating device with weighing sensors |
| CN102320127B (en) * | 2011-06-30 | 2013-12-25 | 重庆交通大学 | Dual-shaft synchronous stretching device |
| CN102862132B (en) * | 2012-08-10 | 2015-08-05 | 吴江市博众精工科技有限公司 | A kind of strainer |
| CN104132853A (en) * | 2014-08-07 | 2014-11-05 | 中国科学技术大学 | Temperature-control high-speed large-strain membrane two-way stretching device and experimental method thereof |
| CN104849138B (en) * | 2015-03-23 | 2018-10-26 | 同济大学 | A kind of device measuring film compression modulus |
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| CN108123671A (en) * | 2017-11-29 | 2018-06-05 | 北京创昱科技有限公司 | A kind of frame compression set and film drawing process |
| CN109342180B (en) * | 2018-12-17 | 2019-07-26 | 清华大学 | Multi-shaft stretching device |
| CN109655332B (en) * | 2019-02-15 | 2021-07-09 | 广东石油化工学院 | Be used for tensile test to prevent eccentric anchor clamps for civil engineering |
-
2009
- 2009-01-12 CN CN2009100766503A patent/CN101504342B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879267A (en) * | 2012-09-18 | 2013-01-16 | 华南理工大学 | Unilateral plastic film stretching test method and device based on constant strain rate |
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