CN102519934A - Epoxy carbon-fiber composite tension loading test device and clamping method - Google Patents
Epoxy carbon-fiber composite tension loading test device and clamping method Download PDFInfo
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- CN102519934A CN102519934A CN2011104061744A CN201110406174A CN102519934A CN 102519934 A CN102519934 A CN 102519934A CN 2011104061744 A CN2011104061744 A CN 2011104061744A CN 201110406174 A CN201110406174 A CN 201110406174A CN 102519934 A CN102519934 A CN 102519934A
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Abstract
The invention discloses an epoxy carbon-fiber composite tension loading test device, which contains a bearer. The bearer has a concave shape and is equipped with two vertical plates at the two sides. A draw ring is disposed in one of the vertical plates and the other vertical plate is equipped with a bolt hole. An extension spring and a first and a second fixing clamp for fixing a tested sample are arranged between the two vertical plates. The first and second fixing clamps both contain a clamping portion respectively positioned at one end of each clamp. The other end of the first fixing clamp is provided with an extension spring hole, and the other end of the second fixing clamp is provided with a threaded rod, which is equipped with a force application adjustment nut. The device provided by the invention has small volume and a simple structure, can be directly used in material moisture absorption experiments, and can be directly used in near infrared spectroscopy and Raman spectrum acquisition of a sample without dismounting the sample. It is convenient to load stress by the high-performance spring and the stress is determined according to the permissible stress range of the spring. The structure contains a certain tension range required by the composite and has practicality.
Description
Technical field
The present invention relates to a kind of stress loading test device, relate in particular to a kind of epoxy radicals carbon fibre composite tension loading test device that is used for.
Background technology
All the time can be in different ambient stresses in the use of compound substance; Therefore the moisture absorption behavior and the unrelieved stress in the moisture absorption process thereof of research compound substance under certain ambient stress change, and will the important theory reference frame be provided to the design and the application of this material.
Because the thermal expansivity of fiber and epoxy resin is different, in addition, in resin curing process, resin will shrink, but the contraction of fiber restriction resin exists interface residual stress or interface internal stress like this in compound substance.The internal stress that acts on the matrix is a pair of acting force and reacting force with the internal stress that acts on the fiber.Adopt little Raman spectroscopy to characterize the damp and hot stress of carbon-fibre reinforced epoxy resin composite material.The damp and hot unrelieved stress of Raman spectroscopy measurements compound substance need not be destroyed sample, and experiment itself can not suffered damp and hot interference, and measuring accuracy is high.YoungLucas M; People such as Young RJ have studied the thermal effect and the deformational behavior of SWCN compound substance through the characteristic peak frequency displacement of carbon, and the carbon characteristic peak moved to left when the result showed heating, and during sample deformation; Moved to left by the peak value of tension, the peak value of compression chord moves to right.Measured the skew at the Raman spectral signature peak under the same position point different situations,, and then obtained the damp and hot unrelieved stress size of different moisture absorption times of fiber because the skew at carbon fibre Raman spectral signature peak and stress, strain variation are linear.Utilize the relation of strain of carbon fibre monofilament and Raman frequency displacement to confirm the carbon fibre frequency shift amount that moisture absorption causes in the compound substance; The carbon fibre monofilament stress, the strain curve that utilize the micro mechanics tester to record are then confirmed the stress that different stress situation is caused with the relation of frequency shift amount.
At present; Moisture absorption behavior under the compound substance stressing conditions and Raman stress test thereof, use be the device of four-point bending, need foil gauge and ancillary equipment to record the distortion of materials amount; But whole device volume is not easy to greatly move, carry, and price costliness very.In addition, be used to measure the force loading device of answering that compound substance moisture absorption kinetic curve uses, heaviness too, and the design feature that receives it and the restriction of size can not be used for the measurement of Raman spectrum.In order to further investigate the influence of external carbuncle to unrelieved stress in moisture absorption rule and the moisture absorption process of compound substance under different ambient stresses; Need to measure the Raman spectrum on the compound substance same position under the continuous moisture absorption situation; With compound substance one-point measurement Raman spectrum and calculate the changing value of its unrelieved stress under different ambient stresses; Therefore, need a kind of structure of exploitation to want simple, light and handy, and can be applicable to the objective table of Raman spectrum.
Summary of the invention
Military service situation to compound substance under the existing situation; A kind of epoxy radicals carbon fibre composite tension loading test device that is used for is provided; The present invention is according to Hooke's law; Be suitable for the spring-loaded system, load applies certain stress through spring to sample, can measure the epoxy radicals carbon fibre composite under ambient stress the moisture absorption kinetic curve and use of the measurement of micro laser Raman appearance to its unrelieved stress.
In order to solve the problems of the technologies described above; The present invention is used for the technical scheme that epoxy radicals carbon fibre composite tension loading test device is achieved: this tension loading test device comprises bearing; Said bearing is concave character type, has two cant boards, and the inboard of one of them cant board is provided with draw ring; Another cant board is provided with a bolt via hole; Between two cant boards, be provided with extension spring and fixedly first stationary fixture and second stationary fixture of tested sample, said first stationary fixture and said second stationary fixture include the clamping part that lays respectively at each anchor clamps one end, and the other end on said first stationary fixture is provided with the extension spring hole; The other end of said second stationary fixture is a threaded rod, and said threaded rod is provided with application of force adjustment nut at this threaded rod position.
Further say, epoxy radicals carbon fibre composite tension loading test device of the present invention, wherein, the center arrangement of the center of said draw ring and said bolt via hole is on same axis.Said clamping part comprises the U type chuck that is provided with the folder mouth; Be provided with two pads in the said folder mouth; Said U type chuck and two pads are provided with one group of through hole that aligns, and said two pads are provided with two groups of through holes that align, and are provided with a bolt in every group of through hole that aligns respectively.On the said bearing, be provided with and the consistent scale of extension spring axial direction being positioned at the extension spring length range.
A kind of epoxy radicals carbon fibre composite of the present invention tension loads the clamp method of test; Utilize the step of above-mentioned tension loading test device clamping sample to be: earlier the end with extension spring hangs in the draw ring on the bearing cant board, and the other end of extension spring is hung in the extension spring hole of first stationary fixture; The thread segment of second stationary fixture is passed in the bolt via hole on the bearing opposite side riser; The two ends of sample according to U type chuck and backing plate on the position in hole process mounting hole, sample is placed between two backing plates in the U type chuck, with bolt U type chuck, backing plate and sample are clamped then; Application of force setting nut through on second stationary fixture places sample on the axis of whole device, and to make the pulling force of sample on the direction of axis be zero basically.
Compared with prior art, the invention has the beneficial effects as follows:
Because epoxy radicals carbon fibre composite tension loading test device of the present invention is based on Hooke's law, be suitable for the spring-loaded system, load applies certain stress through extension spring to sample.Calculate the size of loading stress through control spring deflection and rigidity according to spring rate.The present invention is simple in structure, and force mechanism is clear, is easy to processing, and low price, the sample of clamping need not load and unload and can directly be used for sucting wet experiment and laser micro-raman spectrometry and test, easy operating not only, and reduced experimental cost significantly.
Description of drawings
Fig. 1 is the synoptic diagram that the present invention is used for epoxy radicals carbon fibre composite tension loading test device clamping sample;
Fig. 2 is that the end of backing plate shown in Fig. 1 is to synoptic diagram;
Fig. 3 is the sectional view of the slice location of A-A shown in Fig. 1.
Among the figure:
1-bearing 2-extension spring 3-first stationary fixture
4-bolt 5-backing plate 6-sample
7-fastening bolt 8-second stationary fixture
Embodiment
Below in conjunction with embodiment the present invention is done to describe in further detail.
Epoxy radicals carbon fibre composite tension loading test device of the present invention mainly has a draw ring by an end, and the other end has 2, two anchor clamps of bearing 1, extension spring (being two special bolts) in a hole, four backing plates 5 are formed.Specifically, as shown in Figure 1, comprise bearing 1; Said bearing 1 is concave character type, has two cant boards, and the inboard of one of them cant board is provided with draw ring; Another cant board is provided with a bolt via hole, between two cant boards, is provided with extension spring 2 and fixedly first stationary fixture 3 and second stationary fixture 8 of tested sample 6, and said first stationary fixture 3 and said second stationary fixture 8 include the clamping part that lays respectively at each anchor clamps one end; Said clamping part comprises the U type chuck that is provided with folder mouthful, is provided with two pads 5 in the said folder mouth, and (on perpendicular to U type folder actinal surface direction) is provided with one group of through hole that aligns on said U type chuck and two pads 5; Said two pads 5 are provided with two groups of through holes that align, and, are provided with three holes on the said pad altogether that is; As shown in Figure 2; One of them hole aligns with the backing plate of opposite setting and the hole on the said U type chuck simultaneously, and two holes on the backing plate that two other hole and opposite are provided with align respectively, are provided with a bolt in every group of through hole that aligns respectively; The other end on said first stationary fixture 3 is provided with the extension spring hole, and the center arrangement of the center of said draw ring and said bolt via hole is on same axis; The other end of said second stationary fixture 8 is a threaded rod, and said threaded rod is provided with application of force adjustment nut at this threaded rod position.On the said bearing 1, be provided with and the consistent scale of extension spring axial direction being positioned at the extension spring length range.
First stationary fixture 3 and second stationary fixture 8 among the present invention can be changed a social system with hex bolts, and be as shown in Figure 3, can conveniently draw materials on the one hand, on the other hand, makes things convenient for the processing of through hole on it.
Utilize the process of above-mentioned epoxy radicals carbon fibre composite tension loading test device clamping sample to be:
Earlier the end with extension spring 2 hangs in the draw ring on the bearing cant board, and the other end of extension spring 2 is hung in the extension spring hole of first stationary fixture 3; The thread segment of second stationary fixture 8 is passed in the bolt via hole on the bearing opposite side riser; The two ends of sample according to U type chuck and backing plate 5 on the position in hole process mounting hole; Sample is placed between two backing plates in the U type chuck; With bolt U type chuck, backing plate and sample are clamped then, promptly the two ends of sample 6 are to be clamped through two fastening bolts 7 by upper and lower two backing plates 5, owing to adopt backing plate 5; Thereby strengthened the surface of contact of anchor clamps and sample, made sample stressed comparatively even; Application of force setting nut through on second stationary fixture 8 places sample on the axis of whole device, and to make the pulling force of sample on the direction of axis be zero basically.Whole device is realized loading through turning this nut,
Before the test; Deflection when extension spring was in extended state after fixed next benchmark was used for writing down; Can be with the tie point position of first stationary fixture 3 and extension spring 2 as benchmark; And write down this point corresponding with bearing on scale, calculate the needed deflection of extension spring according to the rigidity and the taseometer of needs loading of extension spring, perhaps write down the stressed of the pairing scale in reference position and extension spring Rigidity Calculation sample when stressed.The application of force setting nut of regulating on second stationary fixture 8 makes the reference position reach needed scale.This just can apply needed tension to sample.Under tensile stress state, do some test samples to sample, for example Raman test, the test of infrared spectrum wait the test of the requirement of experiment that this device can reach.
Although invention has been described for top combination figure; But the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Under the situation that does not break away from aim of the present invention, can also make a lot of distortion, these all belong within the protection of the present invention.
Claims (5)
1. epoxy radicals carbon fibre composite tension loading test device; Comprise bearing (1), it is characterized in that said bearing (1) is concave character type; Have two cant boards; The inboard of one of them cant board is provided with draw ring, and another cant board is provided with a bolt via hole, between two cant boards, is provided with extension spring (2) and fixedly first stationary fixture (3) and second stationary fixture (8) of tested sample (6); Said first stationary fixture (3) and said second stationary fixture (8) include the clamping part that lays respectively at each anchor clamps one end; The other end on said first stationary fixture (3) is provided with the extension spring hole, and the other end of said second stationary fixture (8) is a threaded rod, and said threaded rod is provided with application of force adjustment nut at this threaded rod position.
2. epoxy radicals carbon fibre composite tension loading test device according to claim 1 is characterized in that the center arrangement of the center of said draw ring and said bolt via hole is on same axis.
3. epoxy radicals carbon fibre composite tension loading test device according to claim 1; It is characterized in that; Said clamping part comprises the U type chuck that is provided with the folder mouth, is provided with two pads (5) in the said folder mouth, and said U type chuck and two pads (5) are provided with one group of through hole that aligns; Said two pads (5) are provided with two groups of through holes that align, and are provided with a bolt in every group of through hole that aligns respectively.
4. epoxy radicals carbon fibre composite tension loading test device according to claim 1 is characterized in that, on the said bearing, is provided with and the consistent scale of extension spring axial direction being positioned at the extension spring length range.
5. an epoxy radicals carbon fibre composite tension loads the clamp method of test, it is characterized in that, utilizes the step of epoxy radicals carbon fibre composite tension loading test device clamping sample according to claim 1 following:
Earlier the end with extension spring (2) hangs in the draw ring on the bearing cant board, and the other end of extension spring (2) is hung in the extension spring hole of first stationary fixture (3); The thread segment of second stationary fixture (8) is passed in the bolt via hole on the bearing opposite side riser; The position of going up the hole according to U type chuck and backing plate (5) at the two ends of sample processes mounting hole, and sample is placed between two backing plates in the U type chuck, with bolt U type chuck, backing plate and sample is clamped then; Application of force setting nut through on second stationary fixture (8) places sample on the axis of whole device, and to make the pulling force of sample on the direction of axis be zero basically.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104061744A CN102519934A (en) | 2011-12-08 | 2011-12-08 | Epoxy carbon-fiber composite tension loading test device and clamping method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104061744A CN102519934A (en) | 2011-12-08 | 2011-12-08 | Epoxy carbon-fiber composite tension loading test device and clamping method |
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| CN102519934A true CN102519934A (en) | 2012-06-27 |
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| CN2011104061744A Pending CN102519934A (en) | 2011-12-08 | 2011-12-08 | Epoxy carbon-fiber composite tension loading test device and clamping method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335940A (en) * | 2013-06-04 | 2013-10-02 | 武汉纺织大学 | Dynamic wrinkling device for testing anti-wrinkle performance of fabric |
| CN105571947A (en) * | 2016-02-16 | 2016-05-11 | 南京南瑞集团公司 | Tensile creep testing device capable of testing multiple groups of samples synchronously under temperature and humidity control condition |
| CN105928787A (en) * | 2016-04-14 | 2016-09-07 | 广州纤维产品检测研究院 | Stretching and aging test fixing device and testing method |
| CN111781187A (en) * | 2020-06-29 | 2020-10-16 | 哈尔滨工业大学 | Bidirectional tensile stress micro-Raman sample table for fibrous sample |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5871433A (en) * | 1981-10-26 | 1983-04-28 | Ricoh Co Ltd | Rubber material fatigue test apparatus |
| JPH03152439A (en) * | 1989-11-08 | 1991-06-28 | Hiroyoshi Nagamitsu | Measuring device for hair |
| CN101343882A (en) * | 2008-08-18 | 2009-01-14 | 山东大学 | Miniature pre-stress anchor wire used for model experiment and its burying and loading method |
-
2011
- 2011-12-08 CN CN2011104061744A patent/CN102519934A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5871433A (en) * | 1981-10-26 | 1983-04-28 | Ricoh Co Ltd | Rubber material fatigue test apparatus |
| JPH03152439A (en) * | 1989-11-08 | 1991-06-28 | Hiroyoshi Nagamitsu | Measuring device for hair |
| CN101343882A (en) * | 2008-08-18 | 2009-01-14 | 山东大学 | Miniature pre-stress anchor wire used for model experiment and its burying and loading method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335940A (en) * | 2013-06-04 | 2013-10-02 | 武汉纺织大学 | Dynamic wrinkling device for testing anti-wrinkle performance of fabric |
| CN105571947A (en) * | 2016-02-16 | 2016-05-11 | 南京南瑞集团公司 | Tensile creep testing device capable of testing multiple groups of samples synchronously under temperature and humidity control condition |
| CN105928787A (en) * | 2016-04-14 | 2016-09-07 | 广州纤维产品检测研究院 | Stretching and aging test fixing device and testing method |
| CN111781187A (en) * | 2020-06-29 | 2020-10-16 | 哈尔滨工业大学 | Bidirectional tensile stress micro-Raman sample table for fibrous sample |
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Application publication date: 20120627 |