CN101216394A - Pull-press loading effect based material three dividing point bending fatigue testing method and tool equipment - Google Patents
Pull-press loading effect based material three dividing point bending fatigue testing method and tool equipment Download PDFInfo
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- CN101216394A CN101216394A CNA2008100172799A CN200810017279A CN101216394A CN 101216394 A CN101216394 A CN 101216394A CN A2008100172799 A CNA2008100172799 A CN A2008100172799A CN 200810017279 A CN200810017279 A CN 200810017279A CN 101216394 A CN101216394 A CN 101216394A
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Abstract
The invention relates to a three-point bending fatigue test method based on tension-compression load action material and a tool. The tool comprises a load applying head and test material fixing racks, wherein the load applying head is used for applying preset load to a test material component and is connected with a cylinder piston rod of a material tester; the test material fixing racks are symmetrically arranged on both sides of the platform of the material tester; a holding rack is disposed on the upper end of the test material fixing racks and includes a clamp head at the bottom end and an adjusting bolt on the top end; and a positioning block is disposed on the test material fixing rack. The test method comprises the following steps of: clamping a test material of a surface material on the tool, adjusting the control valve for controlling the cylinder, and carrying out three-point bending fatigue indoor test of road materials with positive and negative stress. The method is used for fatigue behavior test study of road materials, and the result is more close to the fatigue behavior of road materials under the action of vehicle loads in comparison with conventional compression-compression load method. The tool has the advantages of accurate positioning, easy operation, reliable work, simple structure and low cost.
Description
Technical field
The present invention relates to a kind of method and device of ground surface material torture test, be specifically related to a kind of based on drawing-press loading effect material three branch bending fatigue testing method and frocks.
Background technology
The indoor torture test of ground surface material is the basis of carrying out the fatigue life of pavement estimation, and only reliable test figure accurately just can obtain near actual fatigue life of pavement estimation result.
Three branch repeated bend tests are to be widely used in North America and the domestic indoor fatigue test method of ground surface material.The load that existing test method applies is the haversine ripple basically, that is to say that what apply is that minimum load is zero or is a bit larger tham zero individual event cyclic load, this moment, the test material bottom produced circulation tension (change), with of the effect of this simulating vehicle load, carry out the estimation of fatigue life of surface layer to road.
Theoretical analysis and field condition experimental study result show, under the vehicular load effect, the existing tension of road deck (change), compressive stress (change) is arranged again, surface layer bears by drawing-asymmetric stresses (change) width of cloth effect that compressive stress (change) constitutes, and according to fatigue strength theory, it is irrational carrying out estimation of fatigue life with maximum tension stress (change), estimate the intension that could disclose fatigue damage with stress (change) width of cloth into damage factor, gained result and reality are more approaching.The present invention studies under above-mentioned background, has obtained having designed and having implemented the required frock of this method based on drawing-press loading effect ground surface material three branch bending fatigue shop experiment methods.
Summary of the invention
Fundamental purpose of the present invention is at the deficiencies in the prior art, provides a kind of based on drawing-press loading effect material three branch bending fatigue testing method and frocks, and this method test material location is accurate, easy operating; Tool structure is simple, and cost is low, reliable operation.
For achieving the above object, the technical solution used in the present invention is: a kind of being used for based on drawing-the test frock of press loading effect material three branch repeated bend tests, comprise Shi Hetou and test material fixed mount: the described lotus head of executing will be for will set the parts that load puts on test material, link to each other with the oil cylinder piston bar of Material Testing Machine by ball pivot, the described lotus head of executing is provided with first dop that is used for the clamping test material, and the described lotus head upper end of executing is provided with the first adjustment bolt that is used to the first dop fixation test material dynamics of adjusting; Described test material fixed mount is symmetricly set on described material test machine platform both sides, its upper end is provided with the retainer that is used for fixing test material vertically downward, described retainer bottom is second dop, the retainer top is provided with the second adjustment bolt that is used to the second dop fixation test material dynamics of adjusting, the locating piece of test material fixed mount bottom for being used for closely contacting with Material Testing Machine platform side and bottom surface.
Another object of the present invention provides a kind of based on drawing-press loading effect material three branch bending fatigue testing methods, and this method may further comprise the steps:
1) test material is clamped to the described He Toushang of executing;
2) regulate the described adjustment of first on the lotus head bolt of executing, make the test material in the step (1) obtain pretightning force, be fixed on the described He Toushang of executing to guarantee described test material;
3) the oil cylinder piston bar of the described Material Testing Machine of adjustment is put down on the back-up block of material test machine platform test material gently, the test material fixed mount is fixed on the material test machine platform assigned address then;
4) regulate the operation valve of the oil cylinder of Material Testing Machine, carry out three branch repeated bend tests of positive and negative stress ratio.
The present invention compared with prior art has the following advantages: this method is used for pavement material fatigue behaviour experimental study, compares with classic method (pressure-press loading effect), and the fatigue behaviour under the vehicular load effect of its result and pavement material is more approaching; This frock to the location of test material accurately, easy operating, reliable operation, simple in structure, cost is low.
Description of drawings
Fig. 1 is the structural representation of frock of the present invention;
Description of reference numerals:
1-executes the lotus head; The 2-test material; 3-test material fixed mount;
The 4-back-up block; The 5-retainer; 6-first adjusts bolt;
The flat 8-interface of 7-Material Testing Machine; The 9-ball pivot;
Platform;
The 10-locating piece; 11-second dop; 12-first dop;
13-second adjusts bolt.
Embodiment
As shown in Figure 1, a kind of being used for executed lotus 1 and test material fixed mount 3 based on drawing-the test frock of press loading effect material three branch repeated bend tests, comprising:
Execute lotus 1 for will set the parts that load puts on test material 2, link to each other with the oil cylinder piston bar of Material Testing Machine by ball pivot 9 and interface 8, execute first dop 12 that lotus 1 is provided for clamping material test material, execute lotus 1 upper end and be provided with first of the dynamics that is used to adjust first dop, 12 fixation test materials and adjust bolt 6.
Test material fixed mount 3 is symmetricly set on material test machine platform both sides, its upper end is provided with the retainer that is used for fixing test material 5 vertically downward, retainer 5 bottoms are second dop 11, retainer 5 tops are useful on second of the dynamics of adjusting second dop, 11 fixation test materials and adjust bolt 13, and test material fixed mount 3 bottoms are to be used for the locating piece 10 that closely contacts with material test machine platform 7 sides and bottom surface.
The present invention utilizes above-mentioned frock to carry out based on drawing-press loading effect material three branch bending fatigue testing methods, and this method is:
1) test material 2 is clamped to described executing on the lotus 1;
2) regulate and describedly to execute first on the lotus 1 and adjust bolt 6, make the test material 2 in the step (1) obtain pretightning force, be fixed on described executing on the lotus 1 to guarantee described test material 2;
3) the oil cylinder piston bar of the described Material Testing Machine of adjustment is put down on the back-up block 4 of material test machine platform 7 test material 2 gently, test material fixed mount 3 is fixed on material test machine platform 7 assigned addresses then;
4) regulate the operation valve of the oil cylinder of Material Testing Machine, carry out three branch repeated bend tests of positive and negative stress ratio.
Be connected with the oil cylinder piston bar of Material Testing Machine by ball pivot 9 and interface 8 executing lotus 1, ball pivot 9 guarantees that piston rods are pure vertical drawing-presses load by what execute that lotus 1 passes to test material 2, do not add any lateral load; Test material 2 installs to be executed after the lotus 1, regulates first and adjusts bolt 6 correct positions, makes test material 2 obtain certain pretightning force and guarantees stationkeeping; Then adjust piston rod, it is put down gently on the back-up block 4, then test material fixed mount 3 accurately is fixed on material test machine platform 7 assigned addresses, it accurately guarantees by the locating piece 10 and second dop 11 location; Regulate first of retainer 5 at last and adjust bolt 6, make test material obtain certain pretightning force and guarantee stationkeeping, can test.
Claims (2)
1. one kind is used for based on drawing-the test frock of press loading effect material three branch repeated bend tests, comprise Shi Hetou and test material fixed mount, it is characterized in that: the described lotus head of executing will be for will set the parts that load puts on test material, link to each other with the oil cylinder piston bar of Material Testing Machine by ball pivot, the described lotus head of executing is provided with first dop that is used for the clamping test material, and the described lotus head upper end of executing is provided with the first adjustment bolt that is used to the first dop fixation test material dynamics of adjusting; Described test material fixed mount is symmetricly set on described material test machine platform both sides, its upper end is provided with the retainer that is used for fixing test material vertically downward, described retainer bottom is second dop, the retainer top is provided with the second adjustment bolt that is used to the second dop fixation test material dynamics of adjusting, the locating piece of test material fixed mount bottom for being used for closely contacting with Material Testing Machine platform side and bottom surface.
2. utilize the described frock of claim 1 to carry out based on drawing-method of press loading effect material three branch repeated bend tests, this method may further comprise the steps:
1) test material is clamped to the described He Toushang of executing;
2) regulate the described adjustment of first on the lotus head bolt of executing, make the test material in the step (1) obtain pretightning force, be fixed on the described He Toushang of executing to guarantee described test material;
3) the oil cylinder piston bar of the described Material Testing Machine of adjustment is put down on the back-up block of material test machine platform test material gently, the test material fixed mount is fixed on the material test machine platform assigned address then;
4) regulate the operation valve of the oil cylinder of Material Testing Machine, carry out three branch repeated bend tests of positive and negative stress ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100172799A CN100573096C (en) | 2008-01-11 | 2008-01-11 | Based on drawing-press loading effect material three branch bending fatigue testing method and frocks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100172799A CN100573096C (en) | 2008-01-11 | 2008-01-11 | Based on drawing-press loading effect material three branch bending fatigue testing method and frocks |
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| Publication Number | Publication Date |
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| CN101216394A true CN101216394A (en) | 2008-07-09 |
| CN100573096C CN100573096C (en) | 2009-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100172799A Expired - Fee Related CN100573096C (en) | 2008-01-11 | 2008-01-11 | Based on drawing-press loading effect material three branch bending fatigue testing method and frocks |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196759A (en) * | 2013-03-06 | 2013-07-10 | 中国科学院地质与地球物理研究所 | Detection apparatus and detection method of displacement of force application point used for testing rock fracture toughness |
| CN103364281A (en) * | 2013-08-09 | 2013-10-23 | 吉林大学 | Material mechanical property in-situ three-point bending test platform with adjustable test environment temperature |
| CN104181059A (en) * | 2013-05-28 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Cable fatigue test device |
| CN105842058A (en) * | 2016-05-13 | 2016-08-10 | 重庆交通大学 | Asphalt mixture beam specimen bending fatigue test fixture |
| CN106950107A (en) * | 2017-03-30 | 2017-07-14 | 南京航空航天大学 | A kind of three-point bending fatigue experimental device |
| CN108801803A (en) * | 2018-08-09 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Mine car bolt bending resistance detection method and mine car bolt bending resistance detection device |
| CN109655333A (en) * | 2019-02-25 | 2019-04-19 | 北京航空航天大学 | A kind of flat test piece stretches-is bent composite fatigue test fixture |
| CN111257133A (en) * | 2020-02-26 | 2020-06-09 | 西安交通大学 | Variable-temperature tension-torsion composite load material mechanical property in-situ testing device |
-
2008
- 2008-01-11 CN CNB2008100172799A patent/CN100573096C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196759A (en) * | 2013-03-06 | 2013-07-10 | 中国科学院地质与地球物理研究所 | Detection apparatus and detection method of displacement of force application point used for testing rock fracture toughness |
| CN103196759B (en) * | 2013-03-06 | 2015-02-25 | 中国科学院地质与地球物理研究所 | Detection apparatus and detection method of displacement of force application point used for testing rock fracture toughness |
| CN104181059A (en) * | 2013-05-28 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Cable fatigue test device |
| CN103364281A (en) * | 2013-08-09 | 2013-10-23 | 吉林大学 | Material mechanical property in-situ three-point bending test platform with adjustable test environment temperature |
| CN103364281B (en) * | 2013-08-09 | 2015-10-21 | 吉林大学 | The material mechanical property in-situ three-point bend test platform that test environment temperature is adjustable |
| CN105842058A (en) * | 2016-05-13 | 2016-08-10 | 重庆交通大学 | Asphalt mixture beam specimen bending fatigue test fixture |
| CN106950107A (en) * | 2017-03-30 | 2017-07-14 | 南京航空航天大学 | A kind of three-point bending fatigue experimental device |
| CN106950107B (en) * | 2017-03-30 | 2023-09-29 | 南京航空航天大学 | Three-point bending fatigue test device |
| CN108801803A (en) * | 2018-08-09 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Mine car bolt bending resistance detection method and mine car bolt bending resistance detection device |
| CN109655333A (en) * | 2019-02-25 | 2019-04-19 | 北京航空航天大学 | A kind of flat test piece stretches-is bent composite fatigue test fixture |
| CN111257133A (en) * | 2020-02-26 | 2020-06-09 | 西安交通大学 | Variable-temperature tension-torsion composite load material mechanical property in-situ testing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100573096C (en) | 2009-12-23 |
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Granted publication date: 20091223 Termination date: 20120111 |