CN202101953U - In-situ loading device based on X-ray tomography - Google Patents
In-situ loading device based on X-ray tomography Download PDFInfo
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- CN202101953U CN202101953U CN2011202051194U CN201120205119U CN202101953U CN 202101953 U CN202101953 U CN 202101953U CN 2011202051194 U CN2011202051194 U CN 2011202051194U CN 201120205119 U CN201120205119 U CN 201120205119U CN 202101953 U CN202101953 U CN 202101953U
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- fixture block
- clamp block
- carbon fiber
- fiber reinforced
- reinforced plastics
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Abstract
An in-situ loading device based on X-ray tomography comprises a lower clamp block, an upper clamp block, a displacement sensor, and carbon fiber reinforced plastic rods. A cavity, a mobile dowel bar and a loading screw are arranged on the upper clamp block; the mobile dowel bar is connected with the upper clamp block in a sliding manner, one end of the mobile dowel bar is positioned outside the upper clamp block, and the other end of the mobile dowel bar is positioned in the cavity; the loading screw and the upper clamp block are in threaded connection; a stress sensor is arranged in the cavity and positioned between the other end of the mobile dowel bar and the loading screw; the displacement sensing head of the displacement sensor and the stress sensor are in contact with each other; upper end connection holes and lower end connection holes are formed on the upper clamp block and the lower clamp block; the upper ends and the lower ends of the carbon fiber reinforced plastic rods are arranged in the upper end connection holes and the lower end connection holes and are fastened by upper end fastening bolts and lower end fastening bolts, which are arranged on the upper clamp block and the lower clamp block; and upper end fixing pins and lower end fixing pins are arranged on the upper clamp block and the lower clamp block and radially penetrate through the carbon fiber reinforced plastic rods.
Description
Technical field:
The utility model belongs to mechanical hook-up, is specifically related to a kind of original position charger based on x-ray tomography.
Background technology:
Tomography is a kind of computing method of coming the inverting physical model from observation data, in inversion, will use complex mathematical and calculate, because this conversion can only adopt computing machine to accomplish, so be commonly referred to as computerized tomography.After x-ray tomography utilizes X ray to penetrate various materials exactly and is partially absorbed,, calculate layer image data being handled through computing machine at the resulting transmitted intensity signal of detecting device.X-ray tomography has in-situ observation, fault imaging, and the advantage of three-dimensional perspective is so there is bright application prospect in the fine sight structural characterization of material three-dimensional field.Along with going deep into of damage and defect sturcture research, researcher need be known under loading, the rule that the three-dimensional fine of material is seen the structural damage development and developed.It is no problem to utilize x-ray tomography equipment that the sample before and after the damage is carried out the ex situ test; But obtain quantitative evolution data in order to hold the damage evolutionary process more accurately and more easily the x-ray tomography data to be compared to handle, need the add in-place loading system.
Consider that sample stage need rotatablely move in the tomography data acquisition, and the peak load of sample stage is limited, realizes the original position experiment so be difficult to directly to be added to sample stage to the power of loading system.The device of being in harmony certainly that adopts load power to bear in inside is a kind of suitable selection; This device need use the window material that lets X ray as far as possible pass through simultaneously; Consider that tomography generally needs Rotate 180 degree or 360 degree; The X ray window material will inevitably become load-carrying construction, thereby select suitable window material and it is reasonably fixed, is connected to become technical barrier.
Given this; The utility model select little to the X ray decay and carbon fiber reinforced plastics with good mechanical property as window material; Utilize pressurization of side direction fastening bolt and the fixing double fixed method of fixed pin; Solved smooth carbon fiber reinforced plastics rod and intermetallic fixation problem, developed the original position charger of specialized application in x-ray tomography.This device be one be independent of x-ray tomography equipment be in harmony mechanism certainly, promptly load only acts on device inside, does not act on the sample stage.Can realize the tomography scanning of sample under loading, the three-dimensional fine that this device can be used for x-ray tomography original position research material is seen the rule of development, differentiation and the damage deterioration of structure.
The utility model content:
The purpose of the utility model provides a kind of loading tool that can reduce itself to the absorption of X ray and can guarantee the original position charger based on x-ray tomography in dependability and serviceable life.The utility model adopts following technical scheme to be achieved:
A kind of original position charger based on x-ray tomography; Comprise: following fixture block, last fixture block, force transducer, displacement transducer and carbon fiber reinforced plastics rod, on last fixture block, be provided with cavity, move transmission rod and load screw, described mobile transmission rod and last fixture block are slidingly connected; And; An end that moves transmission rod is positioned at the outside of fixture block, and the other end that moves transmission rod is positioned at cavity, loads screw and is threaded with last fixture block; In said cavity, be provided with strain gauge and strain gauge between the other end that moves transmission rod and loading screw, the displacement sensing head and the strain gauge of described displacement transducer are inconsistent;
On last fixture block, be provided with the upper end connecting hole; The upper end of carbon fiber reinforced plastics rod is located in the connecting hole of said upper end and by the upper end fastening bolt that is located on the fixture block and tightens up, and on last fixture block, is provided with the upper end that upper end fixed pin and upper end fixed pin radially pass the carbon fiber reinforced plastics rod;
Be provided with the lower end connecting hole on the fixture block down; The lower end of carbon fiber reinforced plastics rod is located in the connecting hole of said lower end and by the lower end fastening bolt that is located at down on the fixture block and tightens up, and on following fixture block, is provided with the lower end that lower end fixed pin and lower end fixed pin radially pass the carbon fiber reinforced plastics rod.
The characteristics and the beneficial effect of the utility model are:
The utility model has selected for use the carbon fiber reinforced plastics rod of and good mechanical performance little to the X ray decay as X ray window material and load-carrying construction material, becomes technological difficulties yet how to be fixedly connected smooth carbon fiber reinforced plastics rod; The utility model utilizes pressurization of side direction fastening bolt and the fixing double fixed method of fixed pin, has solved smooth carbon fiber reinforced plastics rod and intermetallic fixation problem; Developed the original position charger of specialized application in x-ray tomography.The utility model has selected the little carbon fiber reinforced plastics of X ray decay as the X ray window material, can reduce the absorption of loading tool to X ray itself, thereby guarantee tomography photographing imaging quality.The fixing means that the utility model adopts has guaranteed the dependability and the serviceable life of this device.For the dependability of the utility model is described; Fig. 4 provides and has utilized the utility model embodiment that the stainless steel metal sample of a relative stiffness is loaded into the load change curve in time behind the 2580N; Visible through after 510 minutes from figure; Load power has still kept 98% of initial load, can be satisfied with the tomography test after the loading.
Utilize this device can on x-ray tomography equipment, carry out the test of add in-place carrier material, thereby obtain to load high-resolution x-ray tomography image in front and back and the loading procedure.When sample is applied compression load, realize obtaining to the morphology observation of sample three-dimension disclocation photograph reconstruct structure and stress, strain information.Utilize this device to realize that original position loads, thereby obtain the evolutionary process of the in-situ three-dimensional microstructure of sample in loading procedure sample.This device has simultaneously that x-ray tomography equipment, volume are little from being in harmony, being independent of, light weight, portable characteristics; Therefore except micro-x-ray tomography, industrial X-ray tomography, this original position charger can also be applied to x-ray imaging equipment such as synchrotron radiation light source; This device can be metal, rock, pottery, glass, cement-based material, bone material or the like to load sample also not restriction.
Description of drawings
Fig. 1 is the three-dimensional plot of the utility model embodiment.
Fig. 2 is the front view of the utility model embodiment.
Fig. 3 is the left view of the utility model embodiment.
Fig. 4 utilizes the utility model embodiment that the stainless steel metal sample of a relative stiffness is loaded into the load change curve in time behind the 2580N.
Embodiment
A kind of original position charger based on x-ray tomography; Comprise: following fixture block 1, go up fixture block 5, displacement transducer 15 and carbon fiber reinforced plastics rod 4; On last fixture block 5, be provided with cavity 8, move transmission rod 12 and load screw 14; Described mobile transmission rod 12 is slidingly connected with last fixture block 5, and an end that moves transmission rod 12 is positioned at the outside of fixture block 5; The other end that moves transmission rod 12 is positioned at cavity 8; Load screw 14 and be threaded with last fixture block 5, in said cavity 8, be provided with strain gauge 13 and strain gauge 13 between the other end that moves transmission rod 12 and loading screw 14, the displacement sensing head and the strain gauge 13 of described displacement transducer 15 are inconsistent;
On last fixture block 5, be provided with upper end connecting hole 111; The upper end of carbon fiber reinforced plastics rod 4 is located in the said upper end connecting hole 111 and by the upper end fastening bolt 7 that is located on the fixture block 5 and tightens up, and on last fixture block 5, is provided with the upper end that upper end fixed pin 19 and upper end fixed pin 19 radially pass carbon fiber reinforced plastics rod 4;
Be provided with lower end connecting hole 112 on the fixture block 1 down; The lower end of carbon fiber reinforced plastics rod 4 is located in the said lower end connecting hole 112 and by the lower end fastening bolt 3 that is located at down on the fixture block 1 and tightens up, and on following fixture block 1, is provided with the lower end that lower end fixed pin 18 and lower end fixed pin 18 radially pass carbon fiber reinforced plastics rod 4.
Consider that x-ray tomography has preferably imaging effect to center symmetry sample and uniaxial compression without acceptance of persons loads effect, four carbon fiber reinforced plastics rods that present embodiment has adopted the axis symmetry connect fixture block up and down.
Below through concrete operation method the utility model is further specified.Each parts is assembled, is connected, is fixed with the described mode of utility model content by the structure shown in the accompanying drawing 1-3.Placing sample then loads; Concrete operation method is following; The two ends of sample contact with mobile transmission rod 12 with following fixture block 1 respectively; Because the test specimen selected for use can only be put in the framework that four carbon fiber reinforced plasticss 4 form, and 4 about the axis symmetry, so can guarantee this charger sample is carried out uniaxial compression without acceptance of persons.Load the position of screw 14 according to the adjusted size of sample; Contact so that load the stress sensor head of screw 14 and strain gauge 13; Adjust displacement transducer 15 simultaneously and reserve the load deflection surplus, said displacement transducer 15 is tightened up by the bolt 16 that is threaded with last fixture block 5; Read the initial value of strain gauge 13 and displacement transducer 15, the initial position when being zero as stress ratio; The position of this charger being fixed on the objective table of micro-x-ray tomography and adjusting objective table makes the x-ray tomography that the zone gets into before the loading within sweep of the eye of X-ray beam and X-ray detector that is studied of test specimen scan; When test specimen being loaded through 14 realizations of rotation loading screw; The load and the displacement of record test specimen; Can be in the three-dimension disclocation structural images of the x-ray tomography after collected specimens under different loads and the displacement loads, then to before loading and the research of comparing of the sample three-dimension disclocation structural images of different loading levels.
The above only is one of embodiment of the utility model, so all equivalences of doing according to the described structure of the utility model patent claim, characteristic and principle change or modify, includes in the utility model patent claim.
Claims (1)
1. original position charger based on x-ray tomography; It is characterized in that; Comprise: following fixture block (1), go up fixture block (5), displacement transducer (15) and carbon fiber reinforced plastics rod (4), on last fixture block (5), be provided with cavity (8), move transmission rod (12) and loading screw (14), described mobile transmission rod (12) and last fixture block (5) are slidingly connected; And; An end that moves transmission rod (12) is positioned at the outside of fixture block (5), and the other end that moves transmission rod (12) is positioned at cavity (8), loads screw (14) and is threaded with last fixture block (5); In said cavity (8), be provided with strain gauge (13) and strain gauge (13) and be positioned at the other end of mobile transmission rod (12) and load between the screw (14), the displacement sensing head of described displacement transducer (15) and strain gauge (13) are inconsistent;
On last fixture block (5), be provided with upper end connecting hole (111); The upper end of carbon fiber reinforced plastics rod (4) is located in the said upper end connecting hole (111) and by the upper end fastening bolt (7) that is located on the fixture block (5) and tightens up, and on last fixture block (5), is provided with the upper end that upper end fixed pin (19) and upper end fixed pin (19) radially pass carbon fiber reinforced plastics rod (4);
Be provided with lower end connecting hole (112) on the fixture block (1) down; The lower end of carbon fiber reinforced plastics rod (4) is located in the said lower end connecting hole (112) and by the lower end fastening bolt (3) that is located at down on the fixture block (1) and tightens up, and on following fixture block (1), is provided with the lower end that lower end fixed pin (18) and lower end fixed pin (18) radially pass carbon fiber reinforced plastics rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202051194U CN202101953U (en) | 2011-06-17 | 2011-06-17 | In-situ loading device based on X-ray tomography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202051194U CN202101953U (en) | 2011-06-17 | 2011-06-17 | In-situ loading device based on X-ray tomography |
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| Publication Number | Publication Date |
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| CN202101953U true CN202101953U (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202051194U Expired - Lifetime CN202101953U (en) | 2011-06-17 | 2011-06-17 | In-situ loading device based on X-ray tomography |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323279A (en) * | 2011-06-17 | 2012-01-18 | 东南大学 | X-ray tomography-based in-situ loading device |
| CN105987922A (en) * | 2015-12-31 | 2016-10-05 | 北京强度环境研究所 | Experimental method for studying material damage micromechanism based on in-situ analysis |
| WO2022122056A1 (en) | 2020-12-10 | 2022-06-16 | Ústav Teoretické A Aplikované Mechaniky Av Čr, V.V.I. | Universal loading device for use in ct scanner |
-
2011
- 2011-06-17 CN CN2011202051194U patent/CN202101953U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323279A (en) * | 2011-06-17 | 2012-01-18 | 东南大学 | X-ray tomography-based in-situ loading device |
| CN105987922A (en) * | 2015-12-31 | 2016-10-05 | 北京强度环境研究所 | Experimental method for studying material damage micromechanism based on in-situ analysis |
| CN105987922B (en) * | 2015-12-31 | 2018-11-06 | 北京强度环境研究所 | A kind of experimental method based on in-situ study technical research material damage microcosmic mechanism |
| WO2022122056A1 (en) | 2020-12-10 | 2022-06-16 | Ústav Teoretické A Aplikované Mechaniky Av Čr, V.V.I. | Universal loading device for use in ct scanner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120104 Effective date of abandoning: 20130306 |
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| RGAV | Abandon patent right to avoid regrant |