CN103837074A - Simple device for judging position and width of crack of brittle material - Google Patents
Simple device for judging position and width of crack of brittle material Download PDFInfo
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- CN103837074A CN103837074A CN201410107763.6A CN201410107763A CN103837074A CN 103837074 A CN103837074 A CN 103837074A CN 201410107763 A CN201410107763 A CN 201410107763A CN 103837074 A CN103837074 A CN 103837074A
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Abstract
The invention relates to a simple device for judging the position and width of a crack of a brittle material. The simple device comprises a resistance wire, an ohmmeter and two pieces to be tested fixedly connected through a connection layer. A plurality of nodes made by a conductive material are evenly distributed in the length direction in the connection layer, the nodes are sequentially in parallel connection through the resistor wire, a test end extends from the nodes, and it is judged whether the crack exists at the position through the ohmmeter by testing resistance of the resistance wire between two nodes. The connection layer is a glue adhesion layer, and the two pieces to be tested are fixedly connected through glue. The resistance wire is welded to the nodes through soldering tin. Under the effect of external load, the resistance wire and the brittle material generate synchronous deformation, by means of the principle that a resistance value of the resistance wire between the nodes is increased along with the crack, increment of the resistance value of the resistance wire between the nodes indicates that the crack is produced between the set of nodes, and the width of the crack can be determined through the variation amplitude of the resistance value of the resistance wire.
Description
Technical field
The present invention relates to the easy device that a kind of hard brittle material crack location and width are judged.
Background technology
In civil engineering work test, in order to obtain the hard brittle material rupture failure situations in test such as rock, concrete and sand-cement slurry, position and the width that need to produce fault and fissures make a determination.The plastic yield that it should be pointed out that the hard brittle materials such as rock is very little, because the position and the width that limit its underbead crack generation of external load device can not directly obtain by external observation.Therefore, adopt some equipment and method, obtain generation position and the situation of change of material internal crackle, the failure mechanism of research hard brittle material is significant.At present, conventional method is after test completes, and takes out test specimen and carries out the measurement of crack location and width, but after the shortcoming of the method is test specimen taking-up, its external loads removal, originally the crack of expansion may be shunk, and can not obtain the developed width in crack in loading procedure.For this reason, designed the easy device that a set of hard brittle material crack location and width are judged, can accurately obtain by this apparatus structure position and the width that crack produces, this device has advantage simple in structure, easy to use, with low cost simultaneously.
Summary of the invention
Crack generation position and width are difficult for judging or judging not accurate enough problem at the trial to the object of the invention is to solve in prior art hard brittle material, the easy device that provides a kind of hard brittle material crack location and width to judge, this device has the features such as accurate, simple in structure, easy to use and with low cost of measuring.
The present invention for addressing the above problem adopted technical scheme is: the easy device that a kind of hard brittle material crack location and width are judged, comprise the test specimen to be measured that resistance wire, ohmmeter are fixedly connected with by articulamentum with two, in articulamentum, be evenly distributed with multiple nodes of being made by conductive material on along its length, between node, be in series successively by resistance wire, on node, extend a test lead, ohmmeter judges by measuring the resistance of resistance wire between two nodes whether this place exists crack.
Described articulamentum is glue bonding coat, and two test specimens to be measured are fixedly connected with by glue.Described resistance wire is welded on node by scolding tin.Resistance wire in tensioned state, is accurately determined hard brittle material crack location and width with the numerical value change by ohmmeter in articulamentum.
Beneficial effect: under lotus effect outside, resistance wire of the present invention and hard brittle material produce deform in same pace, utilize resistance wire resistance between node to produce the principle increasing with crack, between node, the increase of resistance wire resistance shows to have produced crack between this group node, the width in crack can be determined by the amplitude of variation of resistance wire resistance, the width that the present invention is simple in structure, easy to use, can obtain crack under load condition.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Mark in figure: 1, resistance wire, 2, node, 3, test lead, 4, ohmmeter, 5, articulamentum, 6, test specimen to be measured.
Embodiment
For understanding better the present invention, below in conjunction with the drawings and specific embodiments, the present invention is elaborated.As shown in the figure, the easy device that a kind of hard brittle material crack location and width are judged, comprise the test specimen to be measured 6 that resistance wire 1, ohmmeter 4 are fixedly connected with by articulamentum 5 with two, in articulamentum 5, be evenly distributed with multiple nodes of being made by conductive material 2 on along its length, between node 2, be in series successively by resistance wire 1, on node 2, extend a test lead 3, ohmmeter 4 judges by measuring the resistance of resistance wire 1 between two nodes 2 whether this place exists crack.
Described articulamentum 5 is glue bonding coat, and two test specimens 6 to be measured are fixedly connected with by glue.Described resistance wire 1 is welded on node 2 by scolding tin.Resistance wire 1 in tensioned state, is accurately determined hard brittle material crack location and width with the numerical value change by ohmmeter 4 in articulamentum 5.
Using method of the present invention is: first test specimen articulamentum 5 inside surfaces to be measured of making are polished smooth, node 2 is bonded on the inside surface of articulamentum 5 one sides with glue; Secondly, resistance wire 1 is welded on node 2 successively along straight line with scolding tin, and make resistance wire 1 between node 2 in tensioned state; Then, on each node 2, weld test lead 3, make the other end stretch out test specimen along matched moulds layer 5; Finally, by upper and lower two test specimen matched moulds, apply vertical load, carry out the test of crack location and width.In the time that the resistance wire resistance of ohmmeter test produces acute variation, show that this region has produced faulted joint, faulted joint width is determined by resistance increase amplitude.
This device is a kind of equipment of judging hard brittle material crack location and width, and it utilizes the little feature of hard brittle material plastic yield, obtains position and the width information in crack by the distortion of resistance wire.This device has feature simple in structure, easy to use and with low cost.
Claims (4)
1. the easy device that a hard brittle material crack location and width are judged, it is characterized in that: comprise the test specimen to be measured (6) that resistance wire (1), ohmmeter (4) are fixedly connected with by articulamentum (5) with two, in articulamentum (5), be evenly distributed with multiple nodes of being made by conductive material (2) on along its length, between node (2), be in series successively by resistance wire (1), on node (2), extend a test lead (3), ohmmeter (4) judges by the resistance of measuring resistance wire (1) between two nodes (2) whether this place exists crack.
2. the easy device that a kind of hard brittle material crack location according to claim 1 and width are judged, is characterized in that: described articulamentum (5) is glue bonding coat, and two test specimens to be measured (6) are fixedly connected with by glue.
3. the easy device that a kind of hard brittle material crack location according to claim 1 and width are judged, is characterized in that: described resistance wire (1) is welded on node (2) by scolding tin.
4. the easy device that a kind of hard brittle material crack location according to claim 1 and width are judged, it is characterized in that: resistance wire (1) in tensioned state, is accurately determined hard brittle material crack location and width with the numerical value change by ohmmeter (4) in articulamentum (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410107763.6A CN103837074A (en) | 2014-03-21 | 2014-03-21 | Simple device for judging position and width of crack of brittle material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410107763.6A CN103837074A (en) | 2014-03-21 | 2014-03-21 | Simple device for judging position and width of crack of brittle material |
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| CN103837074A true CN103837074A (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410107763.6A Pending CN103837074A (en) | 2014-03-21 | 2014-03-21 | Simple device for judging position and width of crack of brittle material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132418A (en) * | 2017-06-16 | 2017-09-05 | 珠海伊托科技有限公司 | The resistance detecting circuit of overflow protecting element |
| CN108166547A (en) * | 2018-01-30 | 2018-06-15 | 山东大学 | Resistance value alertness grid settlement of foundation tests system and method |
| CN108303498A (en) * | 2018-01-30 | 2018-07-20 | 山东大学 | The linear monitoring system and method that water channel destroys |
| CN108317948A (en) * | 2018-01-30 | 2018-07-24 | 山东大学 | Resistance value alertness grid foundation displacement tests system and method |
| CN115684279A (en) * | 2022-10-31 | 2023-02-03 | 江苏科技大学 | Quantitative test device and method for crack self-repairing effect of cement-based material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU95102600A (en) * | 1995-02-23 | 1996-12-20 | Институт горного дела СО РАН | Method of control of fracture size in rock specimen |
| JP3312298B2 (en) * | 1999-08-17 | 2002-08-05 | 和雄 舘石 | How to measure stress intensity factor |
| CN201803691U (en) * | 2010-03-02 | 2011-04-20 | 赵启林 | Inside embedded type seam monitoring device based on flexible conductive paint |
| CN203772203U (en) * | 2014-03-21 | 2014-08-13 | 洛阳理工学院 | Simple device for determining crack position and width of brittle material |
-
2014
- 2014-03-21 CN CN201410107763.6A patent/CN103837074A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU95102600A (en) * | 1995-02-23 | 1996-12-20 | Институт горного дела СО РАН | Method of control of fracture size in rock specimen |
| JP3312298B2 (en) * | 1999-08-17 | 2002-08-05 | 和雄 舘石 | How to measure stress intensity factor |
| CN201803691U (en) * | 2010-03-02 | 2011-04-20 | 赵启林 | Inside embedded type seam monitoring device based on flexible conductive paint |
| CN203772203U (en) * | 2014-03-21 | 2014-08-13 | 洛阳理工学院 | Simple device for determining crack position and width of brittle material |
Non-Patent Citations (2)
| Title |
|---|
| 张利娟 等: "表面裂纹长度的测量方法", 《材料开发与应用》, 31 October 2009 (2009-10-31), pages 75 - 79 * |
| 邓安仲 等: "基于导电膜电阻拉-敏效应的混凝土裂缝分布式监测技术", 《解放军咯工大学学报(自然科学版)》, vol. 11, no. 2, 30 April 2010 (2010-04-30), pages 162 - 167 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132418A (en) * | 2017-06-16 | 2017-09-05 | 珠海伊托科技有限公司 | The resistance detecting circuit of overflow protecting element |
| CN107132418B (en) * | 2017-06-16 | 2024-04-09 | 珠海伊托科技有限公司 | Resistance detection system of overcurrent protection element |
| CN108166547A (en) * | 2018-01-30 | 2018-06-15 | 山东大学 | Resistance value alertness grid settlement of foundation tests system and method |
| CN108303498A (en) * | 2018-01-30 | 2018-07-20 | 山东大学 | The linear monitoring system and method that water channel destroys |
| CN108317948A (en) * | 2018-01-30 | 2018-07-24 | 山东大学 | Resistance value alertness grid foundation displacement tests system and method |
| CN115684279A (en) * | 2022-10-31 | 2023-02-03 | 江苏科技大学 | Quantitative test device and method for crack self-repairing effect of cement-based material |
| CN115684279B (en) * | 2022-10-31 | 2023-11-21 | 江苏科技大学 | Cement-based material crack self-repairing effect quantitative test device and method |
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Application publication date: 20140604 |