CN101319883B - Material deformation spinor field test method - Google Patents
Material deformation spinor field test method Download PDFInfo
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- CN101319883B CN101319883B CN2007101003469A CN200710100346A CN101319883B CN 101319883 B CN101319883 B CN 101319883B CN 2007101003469 A CN2007101003469 A CN 2007101003469A CN 200710100346 A CN200710100346 A CN 200710100346A CN 101319883 B CN101319883 B CN 101319883B
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Abstract
The invention belongs to the field of material deformation. The invention uses a digital camera to shoot the whole field photos; the two front and back frames of the whole field images or continuous multi-frame images are taken out; relevant image recognition software is used to carry out memorizing and relevant recognition on the images; the deformation spinor characteristic parameter analysis for each point of the whole filed is calculated by a spinor field computing formula; then measurement is carried out to obtain various cartoon documents and data. The invention carries out calculation and analysis on the deformation spinor field of the whole field to give out the value and the direction of the rotating spinor field of each part of the whole field during the cracking process of the deformation of a material; the invention is a novel creation in the field of metal physics.
Description
Technical field
The invention belongs to the material deformation field
Background technology
Russia is in the sample measurement field to real-time specimen surface dynamic profile at present, not carrying out the whole audience deformation spinor field of any stage analyzes and observes, deformation spinor field is the important measurement index that the material deformation amount is destroyed, and does not have this very valuable mesoscopic mechanics research information will influence the level of research.
Summary of the invention
The objective of the invention is to calculate and analyze, and obtain this very valuable mesoscopic mechanics research information by comprehensive deformation spinor field to the sample viewing area any stage of real-time specimen surface dynamic profile.
The present invention uses digital camera to take whole audience image, two frame whole audience images before and after taking out, whole audience image is remembered and correlativity identification with correlativity image identification software, calculated the deformation rotation amount characterisitic parameter distribution of each point in face of the whole audience by the formula of the present invention's employing.
The deformation spinor field computing formula:
α＝arc?tg1/2(dU/dy-dV/dx)
Application computer programs:
dU/dy＝1000*(U(i，j+1)-U(i，j-1))/(Y(i，j+1)-Y(i，j-1))’
dV/dx＝1000*(V(i+1，j)-V(i-1，j))/(X(i+1，j)-X(i-1，j))’
{Omiga}＝0.5*(dU/dy-dV/dx)’
{Alpha}＝ATAN({Omiga})’
α-deformation field any point the anglec of rotation
Any point Y direction distortion in the U--deformation field
Any point directions X distortion in the V--deformation field
After i-is the equidimension piece with whole audience image segmentation, prolong the sequence number that directions X is arranged
After j-is the equidimension piece with whole audience picture breakdown, prolong the sequence number that the Y direction is arranged
ATAN-arc tangent trigonometric function
The anglec of rotation of Alpha-deformation field any point
Material deformation rotation amount method of testing:
1. continuous whole audience image is carried out the analysis of deformation rotation amount
2. the lowest resolution of range of displacement measurement (shooting area): 0.001% to 1%; (resolution with camera is relevant)
3. deformation rotation amount measuring accuracy (measurement result relative error):＜0.1%;
4. the datum length of lattice distance: 0.1-2MM-can set arbitrarily;
5. measurement result: the 2D deformation spinor field, use the color range icon representation, be arranged in order by red, orange, yellow, green, blue, blue, purple from big to small, between each color range intermediate color is arranged;
6. according to the right-handed helix theorem: be forward counterclockwise, clockwise direction is a negative sense.
7. the analysis site of the continuous whole audience image of every cover can be set arbitrarily;
8. the data point density of the continuous whole audience image of every cover can be set arbitrarily;
9. computing velocity: the computing time of 1000 deformation spinor fields is less than 3 seconds.
10. repeatable accuracy: 99%
11. draw the deformation spinor field equal-value map of any Δ t time interval;
12. can draw any Δ t time interval deformation spinor field data file;
13. the synchronous deformation spinor field animation file and the data file of output material deformation process.
Advantage of the present invention:
By real time record and observation are carried out in the equivalent amount of whole audience mobile vector field, deformation spinor field and the strain of the sample in material degenerative process field.The fracture rule information of meso-scale is provided to investigation of materials, can further understand the deformation characteristics of material on meso-scale, can be to the classical problem of this metal physics of material deformation, from traditional dislocation, the slippage theory expands to the mechanical balance problem of solid mechanics of the heterogeneous body of material internal, thereby structure defective to heterogeneous material, as the influence of material deformation and fracture behaviour being analyzed and being deduced, provide crystal grain, crystal boundary, defective, cavity and fragility equate the effect of mesoscopic structure in the material deformation process, the deformation spinor field of the whole audience calculates and analyzes, the analysis of this mesoscopic mechanics is brand-new at metal physics circle, novelty.
Description of drawings
Real-time Jie of the corresponding ess-strain point of Fig. 1 sees deformation substructure image a;
Real-time Jie of the corresponding ess-strain point of Fig. 2 sees deformation substructure image b;
Real-time Jie of the corresponding ess-strain point of Fig. 3 sees deformation substructure image c;
Fig. 4 carries out the equivalent cloud atlas a-b of analytical calculation gained deformation spinor field to continuous picture a.b.c;
Fig. 5 carries out the equivalent cloud atlas b-c of analytical calculation gained deformation spinor field to continuous picture a.b.c.
Embodiment
Fig. 1,2,3 is respectively in the continuous mesoscopic mechanics test, take out one group has certain (time), (strain) at interval, material mesoscopic deformation substructure image a, b, c, from a → b constantly, the sight deformation substructure that is situated between changes, and has taken place (to take in the image) uneven rotation in the full field of view, and this analysis of test methods is calculated a → b, rotation amount constantly changes field pattern a → b, the deformation spinor field data file shown in figure b → c and the table (1).
Table (1) material pulling experiment stress-strain data table
Pulling force (N) strain 1 (%) moment T (time,
Minute, second, millisecond)
28.56404387 0 0.151553905?10-42-0-625
14.21450563 0 0.145237185?10-42-12-109
1.001561857 0 0.130007858?10-42-19-218
11.05504849 0 0.119583113?10-42-24-906
0.710079454 0 0.123943066?10-42-29-171
10.98717472 0 0.118016683?10-42-46-250
21.26955337 0 0.11929854 10-42-49-78
41.44822994 0 0.114544237?10-42-50-515
58.70889902 0 0.095756451?10-42-51-921
70.41351483 0 0.090217653?10-42-54-781
82.3143959 0 0.075699074?10-42-56-203
96.51286165 0 0.063621272?10-42-59-46
107.9620161 0 0.038583144?10-43-7-593
97.41280864 0 0.064399156?10-43-9-46
108.7152596 0 0.046195136?10-43-11-906
97.03323563 0 0.005913141?10-44-47-406
108.3278999 0 0.028492822?10-44-51-671
97.83674819 0 0.016771676?10-45-0-203
108.1500069 0 0.009094866?10-45-25-890
118.3032143 0 0.000625338?10-46-18-609
106.1723662 0 0.006575172?10-46-36-109
118.4817171 0 0.007626013?10-46-40-484
128.9230754 0 0.003057572?10-47-0-953
139.9925532 0 0.028448623?10-47-3-796
157.0637468 0 0.044404776?10-47-6-656
168.4211071 0 0.041618582?10-47-8-78
188.2258068 0 0.060417989?10-47-10-921
199.9128797 0 0.08118266 10-47-12-343
210.1929671 0 0.101274385?10-47-15-187
225.084712 0 0.102393316?10-47-16-609
246.3523614 0 0.141137884?10-47-19-453
258.7555308 0 0.152115234?10-47-20-875
277.3017718 0 0.174452493?10-47-23-734
291.3774064 0 0.180808829?10-47-25-156
305.7337526 0 0.214284551?10-47-28-0
317.902333 0 0.252362299?10-47-30-843
328.7315998 0 0.269201476?10-47-32-265
345.9552347 0 0.297221851?10-47-35-109
357.0522374 0 0.324540537?10-47-36-531
375.9103857 0 0.367888921?10-47-40-828
392.3238373 0 0.387343756?10-47-42-265
415.9990365 0 0.450790631?10-47-46-703
………………?………?……………..?……………….
1067.877076 0 7.609277208?10-52-39-265
1092.628682 0 7.646079498?10-52-40-687
1042.739415 0 7.778106145?10-52-43-531
1074.521082 0 7.7880563 10-52-44-968
1091.319003 0 7.817280853?10-52-46-390
1103.253433 0 7.978812003?10-52-52-78
1085.48018 0 8.114158284?10-52-56-343
1101.133107 0 8.150797536?10-52-57-781
1112.818558 0 8.171911492?10-52-59-203
1082.386961 0 8.367289552?10-53-4-906
1109.192843 0 8.401344038?10-53-6-312
1088.922282 0 8.824717513?10-53-19-171
1116.07978 0 8.838408022?10-53-20-593
1093.811237 0 9.070209803?10-53-27-718
1127.084245 0 9.099896433?10-53-29-140
1138.455447 0 9.119105616?10-53-30-562
1127.820256 0 9.233357028?10-53-33-406
1104.89902 0 9.433880759?10-53-39-109
1118.827433 0 9.465976391?10-53-40-531
1133.384928 0 9.540035095?10-53-43-359
1121.31635 0 9.597623673?10-53-44-781
1111.281559 0 9.6899857 10-53-47-640
1121.502206 0 9.722415363?10-53-49-62
1145.479069 0 9.752845609?10-53-50-484
1131.65417 0 9.891885322?10-53-54-750
1146.893237 0 10.02120791?10-53-59-31
1113.243248 0 10.27267697?10-54-6-140
1136.756103 0 10.29685765?10-54-7-562
1115.524747 0 10.35140257?10-54-8-984
1145.916539 0 10.41218989?10-54-11-828
1120.421799 0 10.58657091?10-54-16-93
1138.706475 0 10.59756451?10-54-17-515
1120.930392 0 10.67165742?10-54-18-953
1148.304283 0 10.68324353?10-54-20-375
1132.743357 0 10.79200092?10-54-23-218
1150.704809 0 10.79702491?10-54-24-656
1160.769454 0 10.94319778?10-54-28-921
1135.166712 0 10.99416777?10-54-30-343
1154.845069 0 11.03621117?10-54-31-765
1137.927731 0 11.15988226?10-54-34-609
1152.827183 0 11.19702097?10-54-36-46
1139.729028 0 11.29015843?10-54-38-890
1159.318017 0 11.31686741?10-54-40-312
1134.069622 0 11.50712445?10-54-46-15
1153.00104 0 11.53733201?10-54-47-437
1175.375633 0 11.63808617?10-54-51-718
1148.427505 0 11.70215337?10-54-53-140
1169.048315 0 11.76940579?10-54-55-984
1146.522792 0 11.8303641 10-54-57-406
1163.336421 0 11.86773186?10-54-58-828
1146.060151 0 11.95215985?10-55-1-687
1173.294918 0 11.97805204?10-55-3-109
1158.907376 0 12.16087371?10-55-8-812
1175.961789 0 12.21321482?10-55-10-234
1160.464766 0 12.27697422?10-55-11-656
1125.806176 0 12.38869257?10-55-14-515
1144.992037 0 12.40800593?10-55-15-937
1172.738812 0 12.45760162?10-55-17-359
1159.579386 0 12.6019413 10-55-21-640
1142.420289 0 12.66486483?10-55-23-62
1164.499463 0 12.70074376?10-55-24-500
1176.78268 0 12.77312913?10-55-27-343
1144.47759 0 13.06539216?10-55-35-906
1154.852093 0 13.09425246?10-55-37-328
1173.518434 0 13.12825764?10-55-38-750
1153.148554 0 13.28854174?10-55-43-62
1171.673429 0 13.32409061?10-55-44-484
1157.303156 0 13.38617668?10-55-45-921
1182.23857 0 13.40884309?10-55-47-328
1159.042402 0 13.47976906?10-55-48-750
1173.609654 0 13.52046361?10-55-50-187
1149.868893 0 13.80088125?10-55-58-734
1172.09168 0 13.8158888 10-56-0-156
1184.771195 0 13.89966861?10-56-3-15
1168.993387 0 14.00526861?10-56-5-859
1189.183654 0 14.08451514?10-56-8-703
1166.95638 0 14.21868277?10-56-12-984
1180.106732 0 14.36623869?10-56-17-265
1155.153561 0 14.44491736?10-56-18-687
1165.369721 0 14.50579535?10-56-21-531
1176.456918 0 14.66398778?10-56-25-812
1165.456064 0 14.75138785?10-56-28-656
1150.249582 0 15.02805162?10-56-37-218
1165.580066 0 15.0811435 10-56-38-640
1125.067237 0 15.21590762?10-56-41-500
1141.411103 0 15.24770262?10-56-42-921
1166.588374 0 15.26675513?10-56-44-343
1155.931134 0 15.37144688?10-56-47-203
1142.799417 0 15.42374186?10-56-48-625
1153.403875 0 15.47075119?10-56-50-46
1139.394583 0 15.52406099?10-56-51-468
1150.715443 0 15.54758156?10-56-52-890
1139.061798 0 15.65567725?10-56-55-734
1125.337973 0 15.87954977?10-57-2-859
1109.616557 0 15.96131903?10-57-4-281
1137.714947 0 16.00031161?10-57-5-703
1123.332088 0 16.04000884?10-57-7-140
1107.160714 0 16.2491808 10-57-12-828
19.99218737 0 28.66663823?10-57-14-250
Claims (1)
1. the method for testing of a material deformation spinor field, it is characterized in that: use digital camera to take whole audience image, two frame whole audience images before and after taking out, with correlativity image identification software whole audience image is remembered with correlativity and to be discerned, the deformation rotation amount characterisitic parameter that calculates each point in face of the whole audience by following formula distributes
The deformation spinor field computing formula:
α＝arc?tg1/2(dU/dy-dV/dx)
Application computer programs:
dU/dy＝1000*(U(i，j+1)-U(i，j-1))/(Y(i，j+1)-Y(i，j-1))’
dV/dx＝1000*(V(i+1，j)-V(i-1，j))/(X(i+1，j)-X(i-1，j))’
{Omiga}＝0.5*(dU/dy-dV/dx)’
{Alpha}＝ATAN({Omiga})’
α-deformation field any point the anglec of rotation
Any point Y direction distortion in the U--deformation field
Any point directions X distortion in the V--deformation field
After i-is the equidimension piece with whole audience image segmentation, prolong the sequence number that directions X is arranged
After j-is the equidimension piece with whole audience picture breakdown, prolong the sequence number that the Y direction is arranged
ATAN-arc tangent trigonometric function
The anglec of rotation of Alpha-deformation field any point
Material deformation rotation amount method of testing is taked following steps:
(1) continuous whole audience image is carried out the analysis of deformation rotation amount;
(2) lowest resolution of range of displacement measurement: 0.001% to 1%;
(3) deformation rotation amount measuring accuracy:＜0.1%;
(4) datum length of lattice distance: 0.1-2MM;
(5) measurement result: the 2D deformation spinor field, use the color range icon representation, be arranged in order by red, orange, yellow, green, blue, blue, purple from big to small, between each color range intermediate color is arranged;
(6) according to the right-handed helix theorem: be forward counterclockwise, clockwise direction is a negative sense;
(7) analysis site of the continuous whole audience image of every cover can be set arbitrarily;
(8) the data point density of the continuous whole audience image of every cover can be set arbitrarily;
(9) computing velocity: the computing time of 1000 deformation spinor fields is less than 3 seconds;
(10) repeatable accuracy: 99%;
(11) draw the deformation spinor field equal-value map of any Δ t time interval;
(12) draw any Δ t time interval deformation spinor field data file;
(13) the synchronous deformation spinor field animation file and the data file of output material deformation process.
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|---|---|---|---|
| CN2007101003469A CN101319883B (en) | 2007-06-08 | 2007-06-08 | Material deformation spinor field test method |
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| CN2007101003469A CN101319883B (en) | 2007-06-08 | 2007-06-08 | Material deformation spinor field test method |
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| CN101319883B true CN101319883B (en) | 2010-08-04 |
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| CN102221341B (en) * | 2011-03-16 | 2013-01-23 | 中国人民解放军国防科学技术大学 | Quick digital image correlation measurement method based on stochastic parallel gradient descent optimization technology |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458528A (en) * | 2003-05-07 | 2003-11-26 | 天津大学 | New enginering structure and material deformation measuring technology |
| CN1837747A (en) * | 2006-02-27 | 2006-09-27 | 王化谦 | Double-camera video frequency large-deformation measurement method and video frequency extension device based thereon |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458528A (en) * | 2003-05-07 | 2003-11-26 | 天津大学 | New enginering structure and material deformation measuring technology |
| CN1837747A (en) * | 2006-02-27 | 2006-09-27 | 王化谦 | Double-camera video frequency large-deformation measurement method and video frequency extension device based thereon |
Non-Patent Citations (2)
| Title |
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| JP特开2005-99012A 2005.04.14 |
| JP特开2006-329628A 2006.12.07 |
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Effective date of registration: 20160715 Address after: Yang Yanlu 101407 Beijing city Huairou District Yanqi Economic Development Zone No. 88 Patentee after: National standard (Beijing) inspection & Certification Co., Ltd. Address before: 100044, 2, Xinjie street, Beijing Patentee before: General Research Institute for Nonferrous Metals |