CN103017954B - Measuring method for plate stress field - Google Patents
Measuring method for plate stress field Download PDFInfo
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- CN103017954B CN103017954B CN201110288306.8A CN201110288306A CN103017954B CN 103017954 B CN103017954 B CN 103017954B CN 201110288306 A CN201110288306 A CN 201110288306A CN 103017954 B CN103017954 B CN 103017954B
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Abstract
The invention relates to a measuring method for a plate stress field. Sensor probes are distributed in an area the plate stress of which is to be measured to form a square and an array. Time-sharing measurement of the value and the direction of the plate stress of each array line is performed by a multicircuit switch and a pulse receiving and transmitting card under the action of an internal program of an industrial personal computer. Finally, each set of measurement data is synthesized by orthogonal decomposition to form the distribution of the intensity and the direction of the stress field of the to-be-measured area. Compared with the traditional measuring method for plate stress, the method disclosed by the invention increases the measurement efficiency, simplifies the operation, is capable of providing the distribution situation of the stress field of the specified area and has wide applicability.
Description
One, technical field
The present invention relates to a kind of dull and stereotyped stress field method.It is high that the method measures efficiency, regional stress field size to be measured, direction and distribution situation can be provided, simple to operate, be particularly suitable for the high speed measuring and analysis of dull and stereotyped Stress Field Distribution, can be widely used in Aeronautics and Astronautics, weapon, automobile, etc. the dull and stereotyped stress field in field and analysis.
Two, background technology
Residual stress measuring method mainly contains Mechanical Method and Physical.Wherein, Mechanical Method can cause damage to structure, is not suitable for the stress mornitoring of not destructive structural; Physical mainly comprises X-ray diffraction method, method of magnetic, neutron diffraction method and ultrasonic method etc., and consider security and portability, ultrasonic method is with the obvious advantage in numerous Non-Destructive Testing strain method.
The method that traditional ultrasonic method Non-Destructive Testing strain method adopts one one to receive or one pair is received detects and is parallel to sensor orientation, between probe narrow regions stress value size and draw, pressure condition, measurement efficiency is low, be not suitable for large scale measurement, the actual distribution state of regional stress field to be measured cannot be provided.One-shot measurement is also just become repetitive measurement simultaneously by the method for simple dependence sensor array probe, also cannot provide the actual conditions of stress area.
Three, summary of the invention
The object of this invention is to provide a kind of dull and stereotyped stress field method.Relate to square array sensor probe and measure dull and stereotyped stress field, measurement data is depicted as stress field grid, by the way of Orthogonal Decomposition, focal stress value size, direction, tension and compression state in grid are synthesized, judge stress field actual stress distribution situation, solve the problem that dull and stereotyped stress field earning performance is analyzed, the measurement for plate Stress Field Distribution rule provides a kind of new thinking.
The present invention is achieved in that
A kind of dull and stereotyped method for measuring stress, form the quadrate array of 8, every limit probe around central magnetic base with 32 ultrasonic transducers, the probe wire on every limit forms a group pattern probe wire bundle and accesses in No. 16 multicircuit switches, No. 16 multicircuit switches are connected with pulse card feeding-discharging by data line, and pulse card feeding-discharging is connected with industrial computer control system by data line.
After test starts, industrial computer control system sends signal, gating pulse card feeding-discharging transmission and reception pulse data and control multicircuit switch one tunnel connect, sensor gathers a road stress value information back industrial computer control system, circulation like this 16 times, namely obtains stress value information corresponding above horizontal 8 lines of region of stress concentration, longitudinally 8 lines.Industrial computer system calculates this dull and stereotyped stress area stress distribution size, direction equal stress state according to the 16 road stress value information analyses gathered.
When one group of stress area has been tested, this array can central magnetic base be that axle rotates and arbitrarily angledly carries out other direction position measurements, other regions can be changed test after unclamping magnetic bases, thus complete the test of wider dull and stereotyped stress field stress distribution successively.
The stress equivalence proper orthogonal decomposition that the present invention proposes can well solve the problem that rear 16 line of tensions of test are comprehensively analyzed, and corresponding line of force measurement is converted into planar survey and has good effect.
Four, accompanying drawing explanation
The dull and stereotyped stress measurement system schematic diagram of Fig. 1
Fig. 2 stress point chooses schematic diagram
Fig. 3 stress equivalence Orthogonal Decomposition schematic diagram
Description of reference numerals is as follows: array probe bundle conductor 1, data line 2, probe 3, No. 16 multicircuit switches 4, pulse card feeding-discharging 5, magnetic bases 6, base switch 7, industrial computer control system 8.
Five, embodiment
Below the specific embodiment of the present invention is described in detail:
As Fig. 1, placed wherein by magnetic bases 6 after selected stress area to be measured and screw switch from 1 to position, position 2, magnetic bases are tightly adsorbed on flat board.Be square around magnetic bases 6 array 8, every limit totally 32 probes 3 constitute stress array measurement matrix.Wire is introduced array probe bundle conductor 1 by 8 probes 3 on the every limit of square, four group pattern probe wire bundles 1 access in No. 16 multicircuit switches 4 in order, No. 16 multicircuit switches 4 are connected with pulse card feeding-discharging 5 by data line 2, and pulse card feeding-discharging 5 is connected with industrial computer control system 8 by data line 2.
As Fig. 2, after test starts, under industrial computer control system 8 acts on, No. 16 multicircuit switches 4 are opened successively and are often organized measuring circuit, and the probe that square sides is just right gathers its corresponding stress area interior lines stress intensity and direction successively.After 16 pairs of sensor probes 3 measurements terminate, namely industrial computer control system 5 stores 16 groups of stress value sizes, directional datas, that is:
σ
L1|L19，σ
L2|L18……σ
L10|L11；σ
R2|R12，σ
R3|R13……σ
R10|R20。These 16 groups of stress value sizes, direction are equivalent to size, the direction of power, namely can carry out Orthogonal Decomposition to it, such as: get A place, Fig. 2 position, horizontal stress value size, direction are (tension); Vertical direction stress value size, direction are (tension).As Fig. 3, so the final stress size and Orientation of this point can synthesize, oblique 45 ° of direction, tensile stress state.In like manner, in square matrices, 81 line of tension intersection point stress value sizes, stress directions can correspondingly be obtained, and the dull and stereotyped Stress Field Distribution rule of this regional location can be analyzed thus.When whole regional stress field is completed, unclamp magnetic bases switch by 2 to position, position 1, rotate square matrices certain angle and can measure next angle position Stress Field Distribution rule.After this region integrated stress analysis of distribution completes, be namely movable to other positions and carry out stress analysis.
The method is measured simply, data capacity is large, it is high to measure efficiency, can be widely used in the dull and stereotyped stress measurement analysis fields such as Aeronautics and Astronautics, navigation, weapon, automobile.
Claims (1)
1. a dull and stereotyped stress field method, it is characterized in that: get 32 ultrasonic transducer probes form 8, every limit probe square array around central magnetic base, the probe wire on every limit forms a group pattern probe wire bundle and accesses in No. 16 multicircuit switches, No. 16 multicircuit switches are connected with pulse card feeding-discharging by data line, pulse card feeding-discharging is connected with industrial computer control system by data line, multicircuit switch Time-sharing control every road, No. 16 break-makes, each circuit-switched data is gathered by pulse card feeding-discharging, industrial computer control system carries out data processing, after test starts, industrial computer control system sends signal, gating pulse card feeding-discharging transmission and reception pulse data and control multicircuit switch one tunnel connect, sensor gathers a road stress value information back industrial computer control system, circulation like this 16 times, namely region of stress concentration laterally 8 lines are obtained, longitudinally corresponding above 8 lines stress value information, industrial computer system calculates the state of this dull and stereotyped stress area stress according to the 16 road stress value information analyses gathered, when one group of stress area has been tested, this array can central magnetic base be that axle rotates and arbitrarily angledly carries out other direction position measurements, other regions can be changed test after unclamping magnetic bases, thus complete the test of wider dull and stereotyped stress field stress distribution successively.
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| CN103017954B true CN103017954B (en) | 2015-07-15 |
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| CN104048786B (en) * | 2014-06-09 | 2016-03-30 | 中国航空工业集团公司北京航空材料研究院 | A kind of method of ultrasound wave nondestructive measurement sheet metal internal residual stress field |
| CN104359604B (en) * | 2014-11-07 | 2017-02-01 | 大连理工大学 | Machine tool assembly combing face stress distribution measuring thin film, system and method |
| CN104458075B (en) * | 2014-12-31 | 2017-01-11 | 中国矿业大学 | Stress distribution monitoring device and method |
| CN105823826A (en) * | 2016-03-10 | 2016-08-03 | 北京理工大学 | Residual stress dynamic distribution ultrasonic array chromatography detecting and monitoring method |
| CN106153728B (en) * | 2016-08-31 | 2019-07-16 | 中冶建筑研究总院有限公司 | A kind of ultrasonic nondestructive testing device |
| CN108267246A (en) * | 2017-12-12 | 2018-07-10 | 武汉科技大学 | A kind of dynamic Tai Yu roads ground connection stress measurement device and method |
| CN112097972B (en) * | 2020-08-12 | 2022-04-05 | 佛山方竹科技有限公司 | Method for rapidly measuring internal stress of building ceramic plate and application |
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Inventor after: Xu Chunguang Inventor after: Song Wentao Inventor after: Li Xiao Inventor after: Pan Qinxue Inventor after: Xiao Dingguo Inventor after: Yang Xiangchen Inventor after: Xu Lang Inventor after: Guo Jun Inventor before: Xu Chunguang Inventor before: Li Xiao Inventor before: Pan Qinxue Inventor before: Xiao Dingguo Inventor before: Yang Xiangchen Inventor before: Xu Lang Inventor before: Guo Jun Inventor before: Song Wentao |
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