CN105928783A - Multiaxial fatigue performance test fixture for round bar specimen - Google Patents
Multiaxial fatigue performance test fixture for round bar specimen Download PDFInfo
- Publication number
- CN105928783A CN105928783A CN201610489510.9A CN201610489510A CN105928783A CN 105928783 A CN105928783 A CN 105928783A CN 201610489510 A CN201610489510 A CN 201610489510A CN 105928783 A CN105928783 A CN 105928783A
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- push rod
- latch
- disk
- sensor cluster
- pole
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0464—Chucks, fixtures, jaws, holders or anvils with provisions for testing more than one specimen at the time
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the field of mechanical property testing of materials, in particular to a multiaxial fatigue performance test fixture for a round bar specimen. The fixture disclosed by the invention consists of a disk, bolts, push rod-sensor components, guiding tubes, a round bar specimen fixture component and a supporting platform; during working, the disk is mounted on a testing machine; the upper part and the lower part of the round bar specimen fixture component are fastened with the testing machine; the bolts are connected with the disk in a thread mode and the like; the guiding tubes are fixed on the supporting platform, and the inner side end parts of the transverse push rod-sensor components are enabled to be accurately attached to a required specimen section; when the testing machine axially loads the round bar specimen in a dynamic stress delta sigma1 mode, the disk drives the bolts to vertically move and further push the push rod-sensor components to transversely move towards the left side and the right side, so that the specimen bears multiaxial dynamic loads of delta sigma2 and delta sigma3 while bearing a dynamic axial load of delta sigma1; a high-cycle multiaxial fatigue performance test of the round bar specimen is realized according to a loading record on the testing machine and loading records of the push rod-sensor components.
Description
Technical field
The present invention relates to material mechanical performance field tests, be specifically related to a kind of pole sample non-proportional loading performance test fixture.
Background technology
Engineering structure and element are generally in multiaxis dynamic fatigue stress state under fatigue load service condition.Material non-proportional loading
Performance, is to evaluate its service ability and the basic basis in life-span.
Existing material non-proportional loading performance test, generally uses as the tired examination of the electro-hydraulic servo multiaxis (tension and compression-torsion) of MTS 809 type
Testing machine and thin-walled tubular sample, application control strain method is tested, and at pipeline, pressure vessel industrial circle, has certain raw
Produce and science and technology meaning.But at other field, structure and element in high week, by a narrow margin multi-axis stress state work, this class testing, remove
Rotoflector (bending load) fatigue test of materials easily realized, other is substantially limited in the certification stand examination of object construction
Test category.The material height week multiaxle fatigue experimental test equipment and method not the most being widely recognized as.
The present invention proposes a kind of smooth pole sample high frequency non-proportional loading performance test fixture, utilizes conventional high frequency fatigue tester
Axially dynamic load produces horizontal Multi-axial Loading load, completes high all non-proportional loading performance tests of smooth pole sample.
Summary of the invention
The present invention solves above-mentioned technical problem and is to provide a kind of smooth pole sample height week non-proportional loading performance test fixture, often utilizes
The axial dynamic load of rule HF fatigue testing machine produces horizontal Multi-axial Loading load, it is achieved high all multiaxises of smooth pole sample are tired
Labor is tested.
The present invention solves above-mentioned technical problem the technical scheme is that pole sample non-proportional loading performance test fixture, described
Test fixture is by disk 1, latch 2, push rod-sensor cluster 3, guide 4, pole specimen holder assembly 5 and support platform 6
Composition；The circle centre position of described disk 1 has through hole, and the card of disk 1 has 4 fixing holes at contour, and adjacent solid
Determining hole to the angle of circle center line connecting is 90 °；Described latch 2 is 4, one end of each latch 2 respectively with on disk 1
Individual fixing hole is fixing to be connected；Described guide 4 is 4, and guide 4 is fixed in support platform 6, has one in each guide 4
Individual push rod-sensor cluster 3, one end of guide 4 also has perforate；The table top center of described support platform 6 has through hole；
One end of described pole specimen holder assembly 5 is carried out through the through hole on disk 1, the other end through the through hole in support platform 6
Fixing；One end of described push rod-sensor cluster 3 connects pole specimen holder assembly 5, the other end of push rod-sensor cluster 3
It is connected with the other end of latch 2 by the perforate of guide 4；Described disk 1 is for the sample in pole specimen holder assembly 5
When carrying out axially loaded, described latch 2 is driven to move up and down；Described latch 2 for promoting push rod-sensor when moving up and down
Assembly 3 has the trend of horizontal side-to-side movement, makes the crack surface of sample in pole specimen holder assembly 5 along direction of crack propagation
Bear tangential dynamic load, be perpendicular to direction of crack propagation and bear and laterally tear load；Described push rod-sensor cluster 3 is used for pushing away
Move and record the information of sample.
The technical scheme that the present invention is total, in such scheme, disk 1 is contained on testing machine, specimen holder assembly about 5 two ends and examination
The machine of testing is fastened together, and latch 2 is fastened together with disk 1 by modes such as screw threads, solid on support platform 6
Fixed described guide 4 makes horizontal push rod-sensor cluster 3 paste the pole specimen test cross section of alignment request, when testing machine is with dynamic stress
Δσ1Mode time pole sample is carried out axially loaded, disk 1 has the described latch 2 of drive and moves up and down, and then promotes institute
State the trend of the horizontal side-to-side movement of push rod-sensor cluster 3, make sample bear dynamic axial Δ σ1Bear while load dynamically
Δσ2、Δσ3Load, according to the loading record loading record and push rod-sensor cluster 3 on testing machine, it is achieved pole sample
High week non-proportional loading performance test.
Further, described latch 2 other end be cone angle be the cone of α °, the other end of described push rod-sensor cluster 3
By the conical inclined surface mated with latch 2 other end cone, the angle of described conical inclined surface is α °, described latch 2
The other end is formed with push rod-sensor cluster 3 other end and is slidably connected, to realize being converted into the up and down motion of described latch 2 pushing away
The trend of the horizontal side-to-side movement of bar-sensor cluster 3.
The purpose of such scheme is to propose a kind of latch 2 to be capable of turning the up and down motion of latch 2 with push rod-sensor cluster 3
Turn to the frame mode of the horizontal side-to-side movement of push rod-sensor cluster 3, certainly, taper seat and the knot of conical inclined surface
It is simple that structure mode has implementation method, and has good controllability.
Further, described push rod-sensor cluster 3 has the function by shimming trim lengths, thus regulates described latch
The taper seat of 3 cones and the starting point of described push rod-sensor cluster 3 conical inclined surface end in contact, thus regulate described latch
2 upper and lower displacements and the conversion proportion of described push rod-sensor cluster 3 lateral displacement, it is achieved luffing loads；Meanwhile, 4 push rods-
Sensor cluster 3 medial end has horizontal plane and is in identical height, the medial extremity of 2 relative push rod-sensor clusters 3
Portion has " scissors " effect.
Further, the table top of described support platform 6 is horizontal structure, and the height of support platform 6 table top has controllability.
Further, described guide 4 is fastenedly connected by bolt with support platform 6, can be by bottom described guide 4
Plus-minus pad mode height-fine adjustment position, makes the requirement loading position of the inner alignment pole sample of described push rod-sensor cluster 3.
Beneficial effects of the present invention: utilize the axial dynamic load of conventional high frequency fatigue tester, produce horizontal Multi-axial Loading dynamic
Load, it is achieved the high week non-proportional loading performance test of smooth pole sample.
Accompanying drawing explanation
Fig. 1 is the structural representation of the pole sample non-proportional loading performance test fixture of the present invention；
Fig. 2 is the pole sample non-proportional loading performance test fixture of present invention sample and push rod-sensor group when carrying out axially loaded
The Impact direction schematic diagram of part；
Fig. 3 be the present invention pole sample non-proportional loading performance test fixture in the company of sample clamp assembly and push rod-sensor cluster
Connect mode schematic diagram；
Fig. 4 is the embodiment of pole sample non-proportional loading performance test fixture of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is further described.
As in figure 2 it is shown, a kind of smooth pole sample height week non-proportional loading performance test fixture example, by disk 1, latch 2,
Push rod-sensor cluster 3, guide 4, pole specimen holder assembly 5, support platform 6 are constituted.The thickness of described disk 1 is
20mm, a diameter of 480mm, have the screw thread of M30 × 2 fastening aftermentioned latch on the circle of diameter 420mm every 90 °
Hole；The described a length of 133mm of latch 2, top 100mm scope turning has M30 × 2 external screw thread and the spiral shell on above-mentioned disk 1
Pit coordinate and reverse nut can be used fasten, bottom 18mm scope design has α cone angle composition taper seat, in order to have
The circular cone inclined-plane, push rod-sensor cluster 3 outer end of identical α angle coordinates；Described push rod-sensor cluster 3 length 210mm,
External diameter 50mm, sensor can use pad trim lengths；Described guide 4 profile foundation length 218mm, height-a width of 80mm
× 80mm, interior diameter be 50mm guide support be that described push rod-sensor cluster 3 guides；Described pole specimen holder group
Part 5 can clamp assay cross section bePole sample；Described support platform 6 is by thickness 20mm, diameter 440mm
Disk and height form for 203mm support.In enforcement, optional different α cone angle, manufactures multiple latch 2 and matches with it
Push rod-sensor cluster 3 outer end.During work, described disk 1, specimen holder assembly about 5 are fastenedly connected with testing machine
Together, the latch 2 described in α cone angle is fastened together with disk 1 by screw thread, on described support platform 6 admittedly
Determine guide 4 to make outside have horizontal push rod-sensor cluster 3 medial end at α circular cone oblique angle to be close to the specimen test cross section of requirement,
Through debugging, demarcate the sensor information acquisition system opened in testing machine and push rod-sensor cluster 3, can realize utilizing routine
The axial dynamic load of HF fatigue testing machine, produces horizontal Multi-axial Loading dynamic load, completes high all multiaxises of smooth pole sample
The function of fatigue property test.
Claims (5)
1. pole sample non-proportional loading performance test fixture, described test fixture is by disk (1), latch (2), push rod-sensing
Device assembly (3), guide (4), pole specimen holder assembly (5) and support platform (6) composition；The circle of described disk (1)
Having through hole at the heart, the card of disk (1) has 4 fixing holes at contour, and adjacent fixation holes is to the folder of circle center line connecting
Angle is 90 °；Described latch (2) is 4, one end of each latch (2) respectively with a fixing hole on disk (1)
Fixing connection；Described guide (4) is 4, and guide (4) is fixed in support platform (6), tool in each guide (4)
Having a push rod-sensor cluster (3), one end of guide (4) also has perforate；The table top center of described support platform (6)
Place has through hole；One end of described pole specimen holder assembly (5) is through the through hole on disk (1), and the other end is through supporting
Through hole on platform (6) is fixed；One end of described push rod-sensor cluster (3) connects pole specimen holder assembly (5),
The other end of push rod-sensor cluster (3) is connected with the other end of latch (2) by the perforate of guide (4)；Described disk
(1) when the sample in pole specimen holder assembly (5) carries out axially loaded, described latch (2) is driven to move up and down；
Described latch (2), for promoting push rod-sensor cluster (3) to have the trend of horizontal side-to-side movement when moving up and down, makes circle
The crack surface of the sample in rod specimen holder assembly (5) bears tangential dynamic load along direction of crack propagation, is perpendicular to Crack Extension
Direction is born and is laterally torn load；Described push rod-sensor cluster (3) is for promoting and record the information of sample.
2. pole sample non-proportional loading performance test fixture as claimed in claim 1, it is characterised in that described latch (2)
The other end be cone angle be the cone of α °, the other end of described push rod-sensor cluster (3) be and latch (2) other end circle
The conical inclined surface that taper is mated, the angle of described conical inclined surface is α °, described latch (2) other end and push rod-sensing
Device assembly (3) other end is formed and is slidably connected, to realize the up and down motion of described latch (2) is converted into push rod-sensor group
The trend of part (3) laterally side-to-side movement.
3. pole sample non-proportional loading performance test fixture as claimed in claim 2, it is characterised in that described push rod-sensing
Device assembly (3) has the function by shimming trim lengths, thus regulates taper seat and the institute of described latch (3) cone
State the starting point of push rod-sensor cluster (3) conical inclined surface end in contact, thus regulate (2) upper and lower displacement of described latch and institute
State the conversion proportion of push rod-sensor cluster (3) lateral displacement, it is achieved luffing loads；Meanwhile, 4 push rod-sensor clusters
(3) medial end has horizontal plane and is in identical height, the medial end tool of 2 relative push rod-sensor clusters (3)
There is " scissors " effect.
4. pole sample non-proportional loading performance test fixture as claimed in claim 3, it is characterised in that described support platform (6)
Table top be horizontal structure, the height of support platform (6) table top has controllability.
5. pole sample non-proportional loading performance test fixture as claimed in claim 4, it is characterised in that described guide (4)
It is fastenedly connected by bolt with support platform (6), can be by finely tuning height in described guide (4) bottom plus-minus pad mode
Degree position, makes the requirement loading position of the inner alignment pole sample of described push rod-sensor cluster (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489510.9A CN105928783A (en) | 2016-06-27 | 2016-06-27 | Multiaxial fatigue performance test fixture for round bar specimen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489510.9A CN105928783A (en) | 2016-06-27 | 2016-06-27 | Multiaxial fatigue performance test fixture for round bar specimen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105928783A true CN105928783A (en) | 2016-09-07 |
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ID=56829747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610489510.9A Pending CN105928783A (en) | 2016-06-27 | 2016-06-27 | Multiaxial fatigue performance test fixture for round bar specimen |
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| CN (1) | CN105928783A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525591A (en) * | 2016-11-30 | 2017-03-22 | 西南交通大学 | Material damage tolerance detection device based on rotating bending fatigue as well as detection method |
| CN109306462A (en) * | 2018-12-19 | 2019-02-05 | 浙江工业大学 | A kind of pole sample high throughput plated film clamping device suitable for magnetic control sputtering device |
| CN109916715A (en) * | 2019-04-11 | 2019-06-21 | 西南交通大学 | A kind of test fixture |
| CN111551456A (en) * | 2020-04-14 | 2020-08-18 | 大连理工大学 | Sensor for monitoring local residual fatigue life of mechanical part under multi-axis load and design method |
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| CN205910057U (en) * | 2016-06-27 | 2017-01-25 | 西南交通大学 | Tired capability test anchor clamps of pole sample multiaxis |
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2016
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Patent Citations (7)
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| US4918993A (en) * | 1986-08-21 | 1990-04-24 | Hughson David R | Method of gauging pre-existing in-situ stress from an extracted sample |
| US4825700A (en) * | 1988-06-15 | 1989-05-02 | Regents Of The University Of Minnesota | Bi-axial geomaterial test system |
| JPH1194721A (en) * | 1997-09-17 | 1999-04-09 | Nkk Corp | Biaxial testing device for material |
| CN102706731A (en) * | 2012-06-14 | 2012-10-03 | 河南理工大学 | Biaxial tension test device for testing performance of sheet metal |
| CN204718885U (en) * | 2015-05-12 | 2015-10-21 | 吉林大学 | Material Micro Mechanical Properties is biaxial stretch-formed-fatigue test system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525591A (en) * | 2016-11-30 | 2017-03-22 | 西南交通大学 | Material damage tolerance detection device based on rotating bending fatigue as well as detection method |
| CN106525591B (en) * | 2016-11-30 | 2023-09-12 | 西南交通大学 | Material damage tolerance detection device and method based on rotational bending fatigue |
| CN109306462A (en) * | 2018-12-19 | 2019-02-05 | 浙江工业大学 | A kind of pole sample high throughput plated film clamping device suitable for magnetic control sputtering device |
| CN109916715A (en) * | 2019-04-11 | 2019-06-21 | 西南交通大学 | A kind of test fixture |
| CN111551456A (en) * | 2020-04-14 | 2020-08-18 | 大连理工大学 | Sensor for monitoring local residual fatigue life of mechanical part under multi-axis load and design method |
| CN111551456B (en) * | 2020-04-14 | 2021-06-08 | 大连理工大学 | Mechanical part fatigue life monitoring sensor under multi-axis load and design method |
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Application publication date: 20160907 |
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