CN203479605U - Test piece supporting device for type-III fracture testing experiment - Google Patents
Test piece supporting device for type-III fracture testing experiment Download PDFInfo
- Publication number
- CN203479605U CN203479605U CN201320556393.5U CN201320556393U CN203479605U CN 203479605 U CN203479605 U CN 203479605U CN 201320556393 U CN201320556393 U CN 201320556393U CN 203479605 U CN203479605 U CN 203479605U
- Authority
- CN
- China
- Prior art keywords
- base
- pair
- test piece
- steel ball
- loading
- 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.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model discloses a test piece supporting device for a type-III fracture testing experiment. The test piece supporting device comprises a pair of loading brackets, three auxiliary rods, steel balls, a pair of supporting blocks and a base, wherein the base is a rectangular thick plate, and the pair of L-shaped loading brackets, the three cylindrical auxiliary rods and the pair of square supporting blocks are connected to the base. The test piece supporting device disclosed by the utility model is simple in structure and can meet experimental requirements by focusing on ingenious combination of limited parts with simple structures rather than complex structures, and the reliability of the device is increased while the manufacturing is convenient and the cost is saved; moreover, the test piece supporting device disclosed by the utility model can ensure the symmetry of supporting and loading positions to ensure that a similar pure shear load is provided for time, so that the test piece supporting device can be well applied to the type-III fracture testing experiment and the experiment can be finished by using a common material testing machine.
Description
Technical field
The utility model belongs to the utility model design solid mechanics basic mechanical characteristic test field, particularly a kind of III type fracture test experiments test specimen bracing or strutting arrangement.
Background technology
Material fracture toughness is a basic parameter of fracturing mechanics, is the tolerance that material stops macroscopic cracking unstable propagation ability, is also the Roughness Parameter of material opposing brittle rupture.The size of it and crackle itself, shape and applied stress size have nothing to do.The intrinsic characteristic of material, only relevant with material itself, thermal treatment and processing technology.It is the critical value of stress intensity factor.The energy that before conventional fracture, object absorbs or outer bound pair object institute work represent.
Basic fracture mode has I type, II type, III type.Opening mode fracture (open mode) is also named in the fracture of I type, is that a kind of danger is the most also to study the most deep fracture mode.Sliding mode fracture (slide mode) is also in the fracture of II type, and tearing mode fracture (twist mode) is also named in the fracture of III type, and they are all relevant with shear stress.Measurement about I type, II type fracture basic parameter has had significant progress, method of testing agrees to that some has formed standard, as tested for measuring the compact tension specimen of I type fragmentation parameters, monolateral lancing-drawing experiment, Double-Notched stretching experiment, monolateral otch three-point bending test, centre burst compression test etc.; For measuring single shear experiment, the double-shear experiment of II type fragmentation parameters, side openings three-point bending test etc.
Research about III type crack initiation is fewer, fails to form unified standard and method.The method of current use has: chute type crackle is sheared (crack rail shear), semi-girder cracking (split cantilever beam) shearing, limit crackle reverses (edge crack torsion), Incline Crack stretching (slant notch tension) etc., yet these methods exist certain defect.What have can not provide pure shear stress, and fracture is no longer simple III type fracture, becomes Mixed Mode Fracture.What have is the restriction that is subject to test specimen and material self character, and I type, the fracture of II type occur in experimentation, causes experiment success rate low.Or experiment needs proprietary experimental facilities, completes on universal testing machine again.Therefore be necessary test test specimen and the experimental technique of III type crack fracture toughness to make improvement.
The guarantee that test fixture test is effectively carried out, for lath-shaped test specimen document " Mode III interlaminar fracture of carbon/epoxy laminates using the edge crack torsion (ECT) test " (de Morais, A.B., et al., Composites Science and Technology, 69(5), 2009:670-676.) and " Investigation of mode III fracture toughness using an anti-clastic plate bending method. " (Farshad, M., and P.Fl ü eler.Engineering fracture mechanics, 60(5), 1998:597-603.) application two kinds of bracing or strutting arrangements, yet easily there is slippage for these two kinds of test units, centering and symmetry are bad, and can not loading force and the symmetry of anchorage force, therefore for above problem, be necessary this device to improve.
Summary of the invention
The purpose of this utility model is to provide a kind of symmetry that can guarantee support and loading position, and simple in structure, easy to process, cost-effective III type fracture test experiments test specimen bracing or strutting arrangement.
The technical solution that realizes the utility model object is:
An III type fracture test experiments test specimen bracing or strutting arrangement, comprises and loads bracing frame, auxiliary rod, steel ball, back-up block and base; Base is rectangle slab, and the loading bracing frame of pair of L type, the auxiliary rod of three column types are, the back-up block of a pair of square is all connected on base; A pair of loading bracing frame is symmetricly set on a pair of diagonal angle of base along diagonal line, a pair of back-up block along diagonal line be symmetricly set in another of base to diagonal angle on; An auxiliary rod is arranged near on a shorter limit of base; Another two auxiliary rods are near on one of base longer limit, and are parallel to this limit and distribute; The axis of all auxiliary rods is all perpendicular to base; The top of the long face of all loading bracing frames is connected with base, another side in base parallel and position and base directly over, on it, have cylindrical guide hole, the axis of guide hole is perpendicular to base; On all back-up blocks, process hemisphere groove, steel ball is freely positioned on back-up block and groove fit, and the top of steel ball is positioned at same level; On a pair of loading bracing frame face parallel with base, have guide hole, vertical projection and a pair of steel ball top point on base the projection of the axis of guide hole on base forms a rectangle; All auxiliary rods are positioned at outside above-mentioned rectangular area.
The utility model compared with prior art, its remarkable advantage:
(1) the utility model is simple in structure, not be conceived to realize testing requirements by complicated structure, but by limited part simple in structure by combining cleverly, meet testing requirements, the reliability of this device also increasing in convenient processing and manufacture and cost-effective while;
(2) the utility model can guarantee the symmetry of support and loading position, take and guarantees to provide approximate pure shear load as the time.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the axonometric drawing of test specimen bracing or strutting arrangement for a kind of III type fracture of the utility model test experiments.
Fig. 2 is the utility model test specimen clamping and loads schematic diagram.
Embodiment
In conjunction with Fig. 1:
An III type fracture test experiments test specimen bracing or strutting arrangement, comprises and loads bracing frame 1, auxiliary rod 2, steel ball 3, back-up block 4 and base 5; Base 5 is rectangle slab, and the loading bracing frame of pair of L type 1, three auxiliary rods 2 of column type, the back-up block 4 of a pair of square are all connected on base 5; A pair of loading bracing frame 1 is symmetricly set on a pair of diagonal angle of base 5 along diagonal line, a pair of back-up block 4 along diagonal line be symmetricly set in another of base 5 to diagonal angle on; An auxiliary rod 2 is arranged near on a shorter limit of base 5; Another two auxiliary rods 2 are near on one of base 5 longer limit, and are parallel to this limit and distribute; The axis of all auxiliary rods 2 is all perpendicular to base 5; The top of all loading bracing frame 1 long faces is connected with base 5, another side in base 5 parallel and position and base 5 directly over, on it, have cylindrical guide hole, the axis of guide hole is perpendicular to base 5; On all back-up blocks 4, process hemisphere groove, steel ball 3 is freely positioned on back-up block 4 and groove fit, and the top of steel ball 3 is positioned at same level; On a pair of loading bracing frame 1 face parallel with base 5, have guide hole, vertical projection and a pair of steel ball 3 top points on base the projection of the axis of guide hole on base 5 forms a rectangle; All auxiliary rods 2 are positioned at outside above-mentioned rectangular area.2, a kind of III type fracture test experiments test specimen bracing or strutting arrangement according to claim 1, is characterized in that, loading bracing frame 1, auxiliary rod 2, steel ball 3, back-up block 4 are all adhesive on base 5.
Fig. 2 is shown in clamping and the loading of test specimen.Plate test specimen is freely positioned on steel ball 3, and load bar loads test specimen by guide hole, until test specimen fracture.
Facts have proved, a kind of III type fracture of the utility model test experiments can be used in the test of III type crack fracture toughness with test specimen bracing or strutting arrangement, and experiment success rate has higher success ratio with respect to other experimental technique, wait simultaneously and guarantee that pure shear loads, operation is simple, is conducive to the elimination of experimental system error.The utility model can complete experiment on general universal testing machine simultaneously, and a kind of III type fracture of the utility model test experiments also can be applicable to the clamping of shear test test specimen with test specimen bracing or strutting arrangement.
Embodiment:
A kind of III type fracture of the utility model test experiments test specimen bracing or strutting arrangement, be applied in bonding bonding interface III type energy release rate rate and the measurement of III type crack fracture toughness, the long 100mm of test middle plateform test specimen, wide 80mm, the III type fracture test experiments test specimen bracing or strutting arrangement of making steel construction.Comprise and load bracing frame 1, auxiliary rod 2, steel ball 3, back-up block 4 and base 5; Base 5 is rectangle slab, and the loading bracing frame of pair of L type 1, three auxiliary rods 2 of column type, the back-up block 4 of a pair of square are all connected on base 5; A pair of loading bracing frame 1 is symmetricly set on a pair of diagonal angle of base 5 along diagonal line, a pair of back-up block 4 along diagonal line be symmetricly set in another of base 5 to diagonal angle on; An auxiliary rod 2 is arranged near on a shorter limit of base 5; Another two auxiliary rods 2 are near on one of base 5 longer limit, and are parallel to this limit and distribute; The axis of all auxiliary rods 2 is all perpendicular to base 5; The top of all loading bracing frame 1 long faces is connected with base 5, another side in base 5 parallel and position and base 5 directly over, on it, have cylindrical guide hole, the axis of guide hole is perpendicular to base 5; On all back-up blocks 4, process hemisphere groove, steel ball 3 is freely positioned on back-up block 4 and groove fit, and the top of steel ball 3 is positioned at same level; On a pair of loading bracing frame 1 face parallel with base 5, have guide hole, vertical projection and a pair of steel ball 3 top points on base the projection of the axis of guide hole on base 5 forms a rectangle; All auxiliary rods 2 are positioned at outside above-mentioned rectangular area, the long 160mm of base, wide 140mm.Auxiliary rod diameter 10mm, guide hole diameter 10mm, other are of a size of free size and guarantee mutually not interfere between each structure.Facts have proved, a kind of III type fracture of the utility model test experiments can well be applied in bonding bonding interface III type energy release rate rate and the measurement of III type crack fracture toughness with test specimen bracing or strutting arrangement, test specimen disconnects along the direction of design, proves the validity of this bracing or strutting arrangement.
Claims (2)
1. an III type fracture test experiments test specimen bracing or strutting arrangement, is characterized in that, comprises and loads bracing frame (1), auxiliary rod (2), steel ball (3), back-up block (4) and base (5); Base (5) is rectangle slab, and the back-up block (4) of the auxiliary rod (2) of the loading bracing frame (1) of pair of L type, three column types, a pair of square is all connected on base (5); A pair of loading bracing frame (1) is symmetricly set on a pair of diagonal angle of base (5) along diagonal line, a pair of back-up block (4) along diagonal line be symmetricly set in another of base (5) to diagonal angle on; An auxiliary rod (2) is arranged near on a shorter limit of base (5); On the close longer limit of base (5) of another two auxiliary rods (2), and be parallel to this limit distribution; The axis of all auxiliary rods (2) is all perpendicular to base (5); The top of the long face of all loading bracing frames (1) is connected with base (5), another side in base (5) parallel and position and base (5) directly over, on it, have cylindrical guide hole, the axis of guide hole is perpendicular to base (5); The upper processing of all back-up blocks (4) hemisphere groove, steel ball (3) is freely positioned over back-up block (4) above and groove fit, and the top of steel ball (3) is positioned at same level; On a pair of loading bracing frame (1) face parallel with base (5), have guide hole, vertical projection and a pair of steel ball (3) top point on base the projection of the axis of guide hole on base (5) forms a rectangle; All auxiliary rods (2) are positioned at outside above-mentioned rectangular area.
2. a kind of III type fracture test experiments test specimen bracing or strutting arrangement according to claim 1, is characterized in that, loading bracing frame (1), auxiliary rod (2), steel ball (3), back-up block (4) are all adhesive on base (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320556393.5U CN203479605U (en) | 2013-09-06 | 2013-09-06 | Test piece supporting device for type-III fracture testing experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320556393.5U CN203479605U (en) | 2013-09-06 | 2013-09-06 | Test piece supporting device for type-III fracture testing experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203479605U true CN203479605U (en) | 2014-03-12 |
Family
ID=50227917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320556393.5U Withdrawn - After Issue CN203479605U (en) | 2013-09-06 | 2013-09-06 | Test piece supporting device for type-III fracture testing experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203479605U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940682A (en) * | 2014-04-29 | 2014-07-23 | 长安大学 | Test device of concrete shear creep coefficient and test method thereof |
| CN105181437A (en) * | 2015-06-08 | 2015-12-23 | 成都理工大学 | Tension shear fracture simulation test device for fractured rock mass |
-
2013
- 2013-09-06 CN CN201320556393.5U patent/CN203479605U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940682A (en) * | 2014-04-29 | 2014-07-23 | 长安大学 | Test device of concrete shear creep coefficient and test method thereof |
| CN103940682B (en) * | 2014-04-29 | 2016-05-11 | 长安大学 | A kind of testing arrangement of concrete shearing Creep Coefficient and method of testing thereof |
| CN105181437A (en) * | 2015-06-08 | 2015-12-23 | 成都理工大学 | Tension shear fracture simulation test device for fractured rock mass |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101482472B (en) | One-dimensional lamination crack tension test method based on Hopkinson principle | |
| CN205003013U (en) | Split hopkinson pressure bar test piece strutting arrangement | |
| CN102589986B (en) | Small bending-purposed changeable supporting-type experiment tamp for thin-plate material | |
| CN103234815A (en) | Test jig for testing K type composite material joint intensity | |
| CN101614637A (en) | A kind of device and test method of measuring tensile strength of solder joint | |
| CN203479605U (en) | Test piece supporting device for type-III fracture testing experiment | |
| CN102928288A (en) | Clamp for tension test | |
| CN105403450A (en) | Composite type fracture test loading device | |
| CN103471935A (en) | Test piece for fracture toughness of III type cracks | |
| CN103454142B (en) | Test piece supporting device for III type fracture testing experiments | |
| CN203479643U (en) | Test piece for testing fracture toughness of type-III cracks | |
| CN101620051A (en) | Concrete pulling-stripping instrument | |
| CN203551346U (en) | Test piece for energy release rate of twist mode of bonding interface | |
| CN103063514B (en) | Radial inclination compressive strength test device for round-section concrete-filled steel tube | |
| CN202928786U (en) | Synchronous fatigue testing device for automobile door handles | |
| CN107870124A (en) | Fixture for the experiment of composite board compression performance | |
| CN203738656U (en) | Butt joint clamping device | |
| CN203037530U (en) | Test apparatus for radial inclined compressive strength of circular-section concrete filled steel tube | |
| CN203561549U (en) | Shearing resistance testing clamp | |
| CN202466651U (en) | Loading device for axial force test of prestressed pipe pile | |
| CN112345340A (en) | Controllable angle crack surface generation device for cylindrical rock sample | |
| Sun et al. | Analysis and experiment on bending performance of laser-welded web-core sandwich plates | |
| CN103454130A (en) | Test piece for III type rupture energy release rate of bonding interface | |
| CN112557181B (en) | Clamp for realizing four-point bending and four-point shearing fatigue of rock concrete with positive and negative stress ratio | |
| CN106018077A (en) | Test fixture for multi-axial fatigue crack propagation performance of CT samples |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140312 Effective date of abandoning: 20150513 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140312 Effective date of abandoning: 20150513 |
|
| RGAV | Abandon patent right to avoid regrant |