CN104483047A - Surface-mounting method for testing residual bending stress of H-shaped steel - Google Patents
Surface-mounting method for testing residual bending stress of H-shaped steel Download PDFInfo
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- CN104483047A CN104483047A CN201410804129.8A CN201410804129A CN104483047A CN 104483047 A CN104483047 A CN 104483047A CN 201410804129 A CN201410804129 A CN 201410804129A CN 104483047 A CN104483047 A CN 104483047A
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Abstract
The invention relates to a surface-mounting method for testing residual stress of H-shaped steel. The surface-mounting method is characterized by comprising steps as follows: a section which is 500 mm long is cut out from the tested H-shaped steel and taken as a test piece, nine strain gauges are pasted on one surface of a web of the test piece, on two straight lines 100 mm far away from two side flanges, in positions 100 mm, 250 mm and 350 mm far away from the end of the test piece as well as positions, 100 mm, 250 mm and 350 mm far away from the end of the test piece and on the center line of the same surface of the web respectively, the length direction of each strain gauge is consistent with the length direction of the test piece, and the nine strain gauges are used for detecting the stress distribution state of the web. The method has the advantages as follows: the operation is simple and convenient, the accuracy rate is increased, the loss is reduced, and the cost is saved.
Description
Technical field
The present invention relates to a kind of pasting method surveying H profile steel unrelieved stress, belong to detection field.
Background technology
H profile steel is mainly used in the aspects such as bridge, oceanographic engineering, plant equipment, house owed by a citizen, highway, industrial building, oil drilling platform, along with greatly developing of China's capital construction, large H-shaped steel can not meet the needs of development, therefore in the urgent need to development large H-shaped steel.
The aligning of H profile steel is one important procedure in production run, determines final mass and the precision of H profile steel.The H profile steel of different size is adopted to the straightening process of its correspondence, in the guarantee edge of a wing and web not flexural deformation, when reaching overall flatness, reduce unrelieved stress, avoid the phenomenon of aligning rear nose and bend fracture to occur.
Because H profile steel residual stress test does not have standard, do not detect the report of H profile steel with strain gauge method, how to detect is the problem studied at present.
Summary of the invention
The object of this invention is to provide a kind of H profile steel unrelieved stress pasting method, accurately to detect the bending stress distribution of web.
Technical scheme of the present invention is as follows:
Detected H profile steel intercepts one section of 500mm length as test block, on one side at test block web, two straight lines apart from two side wing edge 100mm, a slice foil gauge is respectively pasted apart from test block termination 100mm, 250mm, 350mm, the center line of web the same face respectively pastes a slice foil gauge apart from test block termination 100mm, 250mm, 350mm, foil gauge length direction test block length direction is consistent, amount to 9 foil gauges, be used for detecting the stress distribution of web.
Key problem in technology of the present invention is: foil gauge is pasted in the region how selecting stress large, with the bending stress distribution accurately to detect web, solves the bend fracture problem of H profile steel.
Advantage of the present invention is: easy and simple to handle, improves accuracy rate, reduces the loss, cost-saving.
Embodiment
Detected H profile steel intercepts one section of 500mm length as test block, on one side at test block web, two straight lines apart from two side wing edge 100mm, a slice foil gauge is respectively pasted apart from test block termination 100mm, 250mm, 350mm, the center line of web the same face respectively pastes a slice foil gauge apart from test block termination 100mm, 250mm, 350mm, foil gauge length direction test block length direction is consistent, amount to 9 foil gauges, be used for detecting the stress distribution of web.Should to polish on the position determining check point before paster bak stay.
Because the stress surveyed is bending stress, so foil gauge direction (length direction) should be consistent with Workpiece length direction, foil gauge Received signal strength so just can be made complete, H profile steel force-bearing situation could be measured truly, foil gauge direction is contrary, then do not measure result or data are inaccurate; According to workpiece size and shape, test 9 points, substantially reflect the stress distribution situation of H profile steel.
Claims (1)
1. survey the pasting method of H profile steel unrelieved stress for one kind, it is characterized in that: in detected H profile steel, intercept one section of 500mm length as test block, on one side at test block web, two straight lines apart from two side wing edge 100mm, a slice foil gauge is respectively pasted apart from test block termination 100mm, 250mm, 350mm, the center line of web the same face respectively pastes a slice foil gauge apart from test block termination 100mm, 250mm, 350mm, foil gauge length direction test block length direction is consistent, amount to 9 foil gauges, be used for detecting the stress distribution of web.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410804129.8A CN104483047A (en) | 2014-12-23 | 2014-12-23 | Surface-mounting method for testing residual bending stress of H-shaped steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410804129.8A CN104483047A (en) | 2014-12-23 | 2014-12-23 | Surface-mounting method for testing residual bending stress of H-shaped steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104483047A true CN104483047A (en) | 2015-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410804129.8A Pending CN104483047A (en) | 2014-12-23 | 2014-12-23 | Surface-mounting method for testing residual bending stress of H-shaped steel |
Country Status (1)
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| CN (1) | CN104483047A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225970A (en) * | 2016-08-18 | 2016-12-14 | 内蒙古包钢钢联股份有限公司 | The pasting method of detection bending residual stress |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419224A (en) * | 2011-06-09 | 2012-04-18 | 中国科学院力学研究所 | Local thermal disturbance method for residual stress test analysis |
| CN102608169A (en) * | 2012-03-01 | 2012-07-25 | 首钢总公司 | Method for determining precision of blind-hole method residual stress testing system |
| CN103234666A (en) * | 2013-04-26 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for testing residual stress of steel rail |
| CN103278443A (en) * | 2013-04-26 | 2013-09-04 | 内蒙古包钢钢联股份有限公司 | Technology for testing seamless tube residual stress by pasting method |
-
2014
- 2014-12-23 CN CN201410804129.8A patent/CN104483047A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419224A (en) * | 2011-06-09 | 2012-04-18 | 中国科学院力学研究所 | Local thermal disturbance method for residual stress test analysis |
| CN102608169A (en) * | 2012-03-01 | 2012-07-25 | 首钢总公司 | Method for determining precision of blind-hole method residual stress testing system |
| CN103234666A (en) * | 2013-04-26 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for testing residual stress of steel rail |
| CN103278443A (en) * | 2013-04-26 | 2013-09-04 | 内蒙古包钢钢联股份有限公司 | Technology for testing seamless tube residual stress by pasting method |
Non-Patent Citations (1)
| Title |
|---|
| 童乐为等: "Q460 高强度焊接H型钢残余应力试验研究", 《工业建筑》, vol. 42, no. 1, 31 January 2012 (2012-01-31), pages 51 - 55 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225970A (en) * | 2016-08-18 | 2016-12-14 | 内蒙古包钢钢联股份有限公司 | The pasting method of detection bending residual stress |
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Application publication date: 20150401 |
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