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
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- resistance wire
- width
- resistance
- nodes
- crack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 239000003292 glue Substances 0.000 claims abstract description 5
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 230000008859 change Effects 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 238000005476 soldering Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本发明涉及一种脆性材料裂缝位置和宽度判定的简易装置。包括电阻丝、欧姆计和两块通过连接层固定连接的待测试件，连接层内沿长度方向上均匀分布有多个由导电材料制成的节点，节点之间通过电阻丝依次串联而成，节点上延伸出一个测试端，欧姆计通过测定两个节点之间电阻丝的电阻来判断该处是否存在裂缝。所述连接层为胶水粘合层，两块待测试件通过胶水固定连接。所述电阻丝通过焊锡焊接在节点上。在外荷作用下本发明的电阻丝和脆性材料产生同步变形，利用节点之间电阻丝阻值随裂缝产生而增大的原理，节点之间电阻丝阻值增大表明该组节点之间产生了裂缝，裂缝的宽度可由电阻丝阻值的变化幅度确定。
The invention relates to a simple device for judging the position and width of cracks in brittle materials. It includes a resistance wire, an ohmmeter, and two pieces of test pieces fixedly connected through the connection layer. In the connection layer, there are a plurality of nodes made of conductive materials evenly distributed along the length direction, and the nodes are connected in series through resistance wires. A test terminal is extended from the node, and the ohmmeter judges whether there is a crack by measuring the resistance of the resistance wire between the two nodes. The connection layer is a glue bonding layer, and the two pieces to be tested are fixedly connected by glue. The resistance wire is welded on the node by soldering. Under the action of external load, the resistance wire of the present invention and the brittle material produce synchronous deformation, and utilize the principle that the resistance value of the resistance wire between the nodes increases with the generation of cracks, and the increase of the resistance value of the resistance wire between the nodes indicates that there is a crack between the nodes Crack, the width of the crack can be determined by the variation range of resistance wire resistance.
Description
技术领域 technical field
本发明涉及一种脆性材料裂缝位置和宽度判定的简易装置。 The invention relates to a simple device for judging the position and width of cracks in brittle materials.
背景技术 Background technique
在土木工程测试中，为了获取岩石、混凝土和水泥砂浆等脆性材料在试验中的断裂破坏情况，需要对断裂裂缝产生的位置和宽度做出判定。应当指出的是，岩石等脆性材料的塑性变形非常小，由于外部加载装置的限制其内部裂纹产生的位置和宽度不能直接通过外部观测获取。因此，采用一些设备和方法，获得材料内部裂纹的产生位置和变化情况，对研究脆性材料的破坏机理具有重大意义。目前，常用的方法是在试验完成后，取出试件进行裂缝位置和宽度的测量，但该方法的缺点是试件取出后，其外部荷载卸除，原来扩展的裂缝可能收缩，不能得到加载过程中裂缝的实际宽度。为此，设计了一套脆性材料裂缝位置和宽度判定的简易装置，通过该装置结构可准确获得裂缝产生的位置和宽度，同时该装置具有结构简单、使用方便，成本低廉的优点。 In civil engineering testing, in order to obtain the fracture damage of brittle materials such as rock, concrete and cement mortar in the test, it is necessary to determine the position and width of the fracture crack. It should be pointed out that the plastic deformation of brittle materials such as rocks is very small, and the position and width of internal cracks cannot be directly obtained by external observation due to the limitation of external loading devices. Therefore, it is of great significance to study the failure mechanism of brittle materials by using some equipment and methods to obtain the location and change of cracks inside the material. At present, the commonly used method is to take out the test piece to measure the position and width of the crack after the test is completed, but the disadvantage of this method is that after the test piece is taken out, the external load is removed, the originally expanded crack may shrink, and the loading process cannot be obtained. The actual width of the crack in the middle. Therefore, a simple device for determining the position and width of cracks in brittle materials is designed. The position and width of cracks can be accurately obtained through the structure of the device. At the same time, the device has the advantages of simple structure, convenient use and low cost.
发明内容 Contents of the invention
本发明的目的是解决现有技术中脆性材料在试验时裂缝产生位置和宽度不易判定或判定不够准确的问题，提供一种脆性材料裂缝位置和宽度判定的简易装置，该装置具有测量准确、结构简单、使用方便和成本低廉等特点。 The purpose of the present invention is to solve the problem in the prior art that the location and width of cracks in brittle materials are difficult to judge or not accurate enough in the test, and provide a simple device for judging the location and width of cracks in brittle materials. Simple, easy to use and low cost.
本发明为解决上述问题所采用的技术方案为：一种脆性材料裂缝位置和宽度判定的简易装置，包括电阻丝、欧姆计和两块通过连接层固定连接的待测试件，连接层内沿长度方向上均匀分布有多个由导电材料制成的节点，节点之间通过电阻丝依次串联而成，节点上延伸出一个测试端，欧姆计通过测定两个节点之间电阻丝的电阻来判断该处是否存在裂缝。 The technical scheme adopted by the present invention to solve the above problems is: a simple device for judging the position and width of cracks in brittle materials, including resistance wires, ohmmeters and two pieces of test pieces fixedly connected through the connecting layer, the length of the inner edge of the connecting layer There are a number of nodes made of conductive materials evenly distributed in the direction, and the nodes are connected in series through resistance wires. A test terminal is extended from the nodes. The ohmmeter judges the resistance of the resistance wire between the two nodes. Are there any cracks.
所述连接层为胶水粘合层，两块待测试件通过胶水固定连接。所述电阻丝通过焊锡焊接在节点上。电阻丝在连接层内处于绷紧状态，以通过欧姆计的数值变化准确确定脆性材料裂缝位置和宽度。 The connection layer is a glue bonding layer, and the two pieces to be tested are fixedly connected by glue. The resistance wire is welded on the node by soldering. The resistance wire is in a tensioned state in the connection layer to accurately determine the crack position and width of the brittle material through the value change of the ohmmeter.
有益效果：在外荷作用下本发明的电阻丝和脆性材料产生同步变形，利用节点之间电阻丝阻值随裂缝产生而增大的原理，节点之间电阻丝阻值增大表明该组节点之间产生了裂缝，裂缝的宽度可由电阻丝阻值的变化幅度确定，本发明结构简单、使用方便、可在负载状态下获得裂缝的宽度。 Beneficial effects: under the action of external load, the resistance wire and the brittle material of the present invention produce synchronous deformation, using the principle that the resistance value of the resistance wire between the nodes increases with the generation of cracks, the increase of the resistance value of the resistance wire between the nodes indicates that the resistance value of the group of nodes increases. Cracks are generated between them, and the width of the cracks can be determined by the variation range of the resistance value of the resistance wire. The invention has simple structure, convenient use, and can obtain the width of the cracks under load.
附图说明 Description of drawings
图1为本发明的结构示意图。 Fig. 1 is a structural schematic diagram of the present invention.
图中标记：1 、电阻丝，2 、节点，3 、测试端，4 、欧姆计，5 、连接层，6 、待测试件。 Marks in the figure: 1 , resistance wire, 2 , node, 3 , test terminal, 4 , ohmmeter, 5 , connecting layer, 6 , the piece to be tested.
具体实施方式 Detailed ways
为更好地理解本发明，下面结合附图和具体实施例对本发明作详细说明。如图所示，一种脆性材料裂缝位置和宽度判定的简易装置，包括电阻丝1、欧姆计4和两块通过连接层5固定连接的待测试件6，连接层5内沿长度方向上均匀分布有多个由导电材料制成的节点2，节点2之间通过电阻丝1依次串联而成，节点2上延伸出一个测试端3，欧姆计4通过测定两个节点2之间电阻丝1的电阻来判断该处是否存在裂缝。
In order to better understand the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. As shown in the figure, a simple device for judging the position and width of cracks in brittle materials includes a resistance wire 1, an
所述连接层5为胶水粘合层，两块待测试件6通过胶水固定连接。所述电阻丝1通过焊锡焊接在节点2上。电阻丝1在连接层5内处于绷紧状态，以通过欧姆计4的数值变化准确确定脆性材料裂缝位置和宽度。
The connection layer 5 is a glue bonding layer, and the two pieces to be tested 6 are fixedly connected by glue. The resistance wire 1 is welded on the node 2 by soldering. The resistance wire 1 is in a tensioned state in the connecting layer 5 to accurately determine the crack position and width of the brittle material through the value change of the
本发明的使用方法是：首先将制作好的待测试件连接层5内表面打磨光滑，用胶水将节点2粘结在连接层5一侧的内表面上；其次，用焊锡将电阻丝1沿直线依次焊接在节点2上，并使电阻丝1在节点2之间处于绷紧状态；然后，在每个节点2上焊接测试端3，使另一端沿合模层5伸出试件；最后，将上下两块试件合模，施加垂向荷载，进行裂缝位置和宽度的测试。当欧姆计测试的电阻丝阻值产生剧烈变化时，表明该区域产生了断裂缝，断裂缝宽度由阻值增大幅度确定。 The method of use of the present invention is as follows: first, the inner surface of the connection layer 5 of the prepared test piece is polished smooth, and the node 2 is bonded to the inner surface of the connection layer 5 side with glue; The straight lines are welded on the nodes 2 in turn, and the resistance wire 1 is in a tense state between the nodes 2; then, the test end 3 is welded on each node 2, so that the other end extends out of the test piece along the clamping layer 5; finally , Clamp the upper and lower specimens, apply a vertical load, and test the crack position and width. When the resistance value of the resistance wire tested by the ohmmeter changes drastically, it indicates that a crack has occurred in this area, and the width of the crack is determined by the increase of the resistance value.
该装置是一种判定脆性材料裂缝位置和宽度的设备，它利用脆性材料塑性变形小的特点，通过电阻丝的变形获得裂缝的位置和宽度信息。该装置具有结构简单、使用方便及成本低廉的特点。 The device is a device for determining the position and width of cracks in brittle materials. It uses the characteristics of small plastic deformation of brittle materials to obtain the position and width information of cracks through the deformation of resistance wires. The device has the characteristics of simple structure, convenient use and low cost.
Claims (4)
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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103837074A true CN103837074A (en) | 2014-06-04 |
Family
ID=50800807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410107763.6A Pending CN103837074A (en) | 2014-03-21 | 2014-03-21 | Simple device for judging position and width of crack of brittle material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103837074A (en) |
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 | A quantitative test device and method for self-healing effect of cement-based material cracks |
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 | A quantitative test device and method for self-healing effect of cement-based material cracks |
| CN115684279B (en) * | 2022-10-31 | 2023-11-21 | 江苏科技大学 | A quantitative testing device and method for the self-healing effect of cracks in cement-based materials |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103837074A (en) | Simple device for judging position and width of crack of brittle material | |
| CN103995023B (en) | Concrete filled steel tubular member tube wall peels off defect inspection method with concrete interface | |
| CN106501495B (en) | The detection device and detection method of grouting material compactness in a kind of sleeve | |
| CN204422393U (en) | The single-ended pull-out test device of a kind of FRP reinforced concrete bond-slip | |
| CN104729870B (en) | A kind of method of the existing prestress detection of concrete bridge structure | |
| CN105258829A (en) | Underground engineering model test internal space stress measuring device and method | |
| CN103076376B (en) | Metal and applying coating metal erosion state verification array electrode | |
| CN102393338A (en) | Method for separating influences of fatigue damage and thixotropic factor on asphalt modulus | |
| CN104792257B (en) | It is a kind of to measure many places strain process inside early-age concrete simultaneously | |
| CN109239138A (en) | A kind of detection method in concrete structural surface new life crack | |
| CN102253087A (en) | Device and method for automatically measuring fatigue crack propagation velocity | |
| CN203772203U (en) | Simple device for determining crack position and width of brittle material | |
| CN102213583A (en) | Low-modulus optical fiber sensing probe for testing internal stress of flexible road structure | |
| CN104655489B (en) | A kind of method for measuring slab banjo fixing butt jointing welding toe stress concentration | |
| CN105865303A (en) | Continuous armored concrete pavement crack seam test device and method | |
| CN205786235U (en) | A kind of device of quick mensuration seepage flow saturation position | |
| CN104749048A (en) | Method for detecting shearing strength of interlayer bonding surface of rock filled concrete of constructional engineering | |
| CN104215365A (en) | Pavement structure layer internal shearing stress testing sensor and embedding technology and application thereof | |
| CN105716954B (en) | An electrical monitoring method of fracture morphology for hydraulic fracturing simulation test | |
| CN204329964U (en) | The netted monumented point substrate of a kind of laser scanner | |
| CN208313786U (en) | The adhesive property test equipment of coating material under the conditions of pressure infiltration | |
| CN108645715B (en) | Method for determining fracture toughness of concrete rock by seamless test piece | |
| CN206247990U (en) | A kind of physical experiments monitor the structure of displacement | |
| CN104483213A (en) | Test method of strain sensing performance of intelligent carbon fiber plate | |
| CN109458976A (en) | A kind of device and its measuring method of the strain of measurement inside concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140604 |
|
| RJ01 | Rejection of invention patent application after publication |