CN204461896U - Small size component fracture property proving installation - Google Patents
Small size component fracture property proving installation Download PDFInfo
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- CN204461896U CN204461896U CN201520076274.9U CN201520076274U CN204461896U CN 204461896 U CN204461896 U CN 204461896U CN 201520076274 U CN201520076274 U CN 201520076274U CN 204461896 U CN204461896 U CN 204461896U
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- loading head
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- transfer assembly
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Abstract
The utility model discloses a kind of small size component fracture property proving installation, fracture property for small sized metallic component detects, it is characterized in that, by loading head (100), power transmission pin (200), load transfer assembly (300), coaster (400), bending resistance arm-tie (500) and support plinth (600) six part connect into rigid unitary by joinery and its construction and bolt, thus be configured for the vertical load that loading head (100) applies being converted to transverse load and passing to the loading force transmission mechanism of C shape sample (100), and the bending resistance arm-tie (500) being arranged through loading head (100) on load transfer assembly 300 produces transversely deforming to limit power transmission pin (200) because being subject to curved.The utility model can realize the fracture property test of small sized metallic component easily, and the elastic endless that can realize C shape ring sample loads, and structure is simple, easy to make, satisfactory for result.
Description
Technical field
The utility model relates to material mechanics experiment device technique field.
Background technology
Fracture property is the important mechanical property parameter weighing the behavior of component opposing rupture failure, in the assessment of the integrity of structure of engineering component, play vital effect.Open the structural member of crackle for containing I type, the classic method obtaining its fracture property adopts compact tension specimen or single side crack to bend to wait Standard circuits sample to be tested by the load mode of stretching or three-point bending.Due to the configural characteristic of sample, the size of such Standard circuits sample is usually comparatively large, thus requires that the size of tested component is also corresponding comparatively large, effectively could measure the fracture property of component thus.For the component that original size is less, there is no effective fracture property detection technique at present.
Williams JG.The fracture mechanics of surface layer removal.International Journal of Fracture, 2011,170:37-48. proposes to wedge the patterning method that load mode measures low yield stress ductility nonmetallic materials fracture property based on cutting theory in machining.As shown in Figure 1, in this technical scheme, because cutting tool directly can touch the crack tip of sample, without the need to carrying out fatigue crack prefabrication, specimen size is also unrestricted simultaneously.But this technical scheme is only suitable for energy release rate when measuring the fracture of nonmetal flawless component, and the fracture property that cannot be applied to containing crackle hardware measures.
In the detection of concrete fracture performance, a kind of edge splitting (Wedge-Splitting) method is widely applied.Xiao JZ, Schneider H, Donnercke C, Konig G. Wedge splitting test on fracture behavior of ultra high strength concrete.Construction and Building Materials, 2004,18:359-365. Fig. 2 is typical edge splitting method pilot system.This technical scheme adopts wedge shape load plate the vertical load of applying to be converted to the horizontal pull to sample with the force transmitting board of band roller bearing, the impact of sample deadweight on fracture property measurement result can be ignored on the one hand, only need less vertical force just can produce larger horizontal pull on the other hand, thus reduce the requirement to Testing machine stiffness.But, the fracture property detection of this technical scheme because being with the design of roller bearing force transmitting board can not be used for small sized metallic component.
Utility model content
The purpose of this utility model is to provide a kind of device realizing the test of small sized metallic component fracture property.
The utility model object is realized by following means.
A kind of small size component fracture property proving installation, fracture property for small sized metallic component detects, it is characterized in that, by loading head 100, power transmission pin 200, load transfer assembly 300, coaster 400, bending resistance arm-tie 500 and support plinth 600 6 part connect into rigid unitary by joinery and its construction and bolt, thus be configured for the vertical load that loading head 100 applies to be converted to transverse load and the loading force transmission mechanism passing to C shape sample 100, and the bending resistance arm-tie 500 being arranged through loading head 100 on load transfer assembly 300 produces transversely deforming to limit power transmission pin 200 because being subject to curved,
The sphenoid 101 of described loading head 100 both sides is arranged symmetrically with, and the inclination angle of sphenoid 101 ramp is identical; Power transmission pin 200 is platform pole structure, and top is the assembly of semicolumn and 3/4 column type loaded roll 203; Top tenon 201 connects with tension arm-tie 500, and bottom establishes trapezoidal tenon 202 and two through holes be arranged symmetrically with and coaster 400 to be rigidly connected; Loaded roll 203 coordinates with the loading hole of C shape ring sample;
Described load transfer assembly 300 is platform pole structure, top tenon 301 connects with tension arm-tie 500, bottom establishes trapezoidal tenon 302 and two through holes be arranged symmetrically with and coaster 400 to be rigidly connected, the bearing 303 of two same sizes is arranged along with vertically becoming the direction at certain inclination angle in its top, and in the inclination angle of bearing 303 line of centres and loading head 100, the inclination angle of sphenoid 101 is consistent;
Described coaster 400 left and right sides be respectively with the trapezoidal tenon of power transmission pin 200 201 and the trapezoidal tenon of load transfer assembly 300 301 close-fitting trapezoid-shaped openings and threaded hole, coaster is arranged symmetrically with the rolling bearing 401 of 4 same sizes, to reduce frictional resistance during C shape sample 700 horizontal Load-unload; The square opening 402 be communicated with trapezoid-shaped openings is offered, so that the sphenoid 101 of loading head 100 vertically passes through in the side that coaster is connecting near load transfer assembly;
Described bending resistance arm-tie 500 is provided with the close-fitting slotted eye of top tenon 301 with the top tenon 201 of power transmission pin 200 and load transfer assembly 300, is provided with the square opening that the sphenoid 101 of being convenient to loading head 100 vertically passes through simultaneously;
Square groove on described support plinth 600 is the vertical motion headspace of the sphenoid 101 of loading head 100, and on the thickness of the width in hole and the comprehensive sphenoid 101 of the degree of depth, coaster 400, the factor design such as spacing and C shape ring sample joint open of 4 rolling bearings is determined.
Adopt the utility model device, can realize the fracture property test of small sized metallic component easily, especially, the elastic endless that can realize C shape ring sample loads, satisfactory for result.The utility model clear principle, structure is simple, easy to make.If the utility model is tested for the fracture property of large scale hardware, can reach and save the effect that test material reduces experimental cost.
Accompanying drawing explanation
Fig. 1 is prior art patterning method schematic diagram
Fig. 2 is prior art edge splitting method schematic diagram
Fig. 3 the utility model C shape ring sample structure figure
Fig. 4 the utility model loading head structural drawing
Fig. 5 the utility model loading head structural drawing
Fig. 6 the utility model load transfer assembly assumption diagram
Fig. 7 the utility model pulley structure figure
Fig. 8 the utility model bending resistance pulling plate structure figure
Fig. 9 the utility model support plinth structural drawing
Figure 10 C shape ring sample fracture loads schematic diagram
Figure 11 force transmission mechanism wiring layout
Figure 12 calibration device structural drawing
Figure 13 transverse load demarcates schematic diagram
Embodiment
Below in conjunction with accompanying drawing, device of the present utility model is described in further detail.
Charger is made up of loading head 100 (Fig. 4), power transmission pin 200 (Fig. 5), load transfer assembly 300 (Fig. 6), coaster 400 (Fig. 7), bending resistance arm-tie 500 (Fig. 8) and support plinth 600 (Fig. 9) six part, and Figure 10 gives the C shape ring sample fracture schematic diagram that test loads.
The sphenoid 101 of loading head 100 both sides is arranged symmetrically with, and the inclination angle of sphenoid 101 ramp is identical, and the size at inclination angle directly determines that the horizontal opening loads of C shape sample is with the conversion proportion between vertical wedging load.Loading head 100 is made up of high-strength high hard material, and Wear-resistant Treatment should be made in its surface.On loading head 100, sphenoid 101 afterbody installs dismountable gag lever post, to limit the elastic deformation of sphenoid 101 afterbody in the vertical wedging process of loading head 100.
Power transmission pin 200 is platform pole structure, and top tenon 201 connects with tension arm-tie 500, and bottom establishes trapezoidal tenon 202 and two through holes be arranged symmetrically with and coaster 400 to be rigidly connected.Power transmission pin 200 top is the composite unit structure of semicolumn and 3/4 column type loaded roll 203, and loaded roll 203 coordinates with the loading hole of C shape ring sample.
Load transfer assembly 300 is platform pole structure, and top tenon 301 connects with tension arm-tie 500, and bottom establishes trapezoidal tenon 302 and two through holes be arranged symmetrically with and coaster 400 to be rigidly connected.The bearing 303 of two same sizes is arranged along with vertically becoming the direction at certain inclination angle in load transfer assembly 300 top, and in the inclination angle of bearing 303 line of centres and loading head 100, the inclination angle of sphenoid 101 is consistent.Bearing 303 is necessary for Precision Machining and has enough rigidity and the sliding bearing of hardness, can not adopt the finished product rolling bearing bought from market.
Coaster 400 left and right sides be respectively with the trapezoidal tenon of power transmission pin 200 201 and the trapezoidal tenon of load transfer assembly 300 301 close-fitting trapezoid-shaped openings and threaded hole.Coaster is arranged symmetrically with the rolling bearing 401 of 4 same sizes, to reduce frictional resistance during C shape sample 700 horizontal Load-unload.The square opening 402 be communicated with trapezoid-shaped openings is offered, so that the sphenoid 101 of loading head 100 vertically passes through in the side connected near load transfer assembly.
Power transmission pin 200, load transfer assembly 300 and coaster 400 connect into a rigid unitary by the joinery and its construction that arranges and bolt, thus are configured for the vertical load that loading head 100 applies to be converted to transverse load and the force transmission mechanism (Figure 11) passing to C shape sample 100.
Bending resistance arm-tie 500 is provided with the close-fitting slotted eye of top tenon 301 with the top tenon 201 of power transmission pin 200 and load transfer assembly 300, is provided with the square opening that the sphenoid 101 of being convenient to loading head 100 vertically passes through simultaneously.The effect of bending resistance arm-tie 500 is to limit power transmission pin 200 because of by curved and transversely deforming that is that produce.
Square groove on support plinth 600 is the vertical motion headspace of the sphenoid 101 of loading head 100, and the width in hole and the degree of depth should the comprehensive factor appropriate design such as spacing and C shape ring sample joint open of 4 rolling bearings on the thickness of sphenoid 101, coaster 400.
In technical solutions of the utility model, try 700 samples by the vertical motion of wedge shape loading head to C shape ring to implement to open loading, in loading procedure, the horizontal opening loads FH of horizontal opening displacement V, the C shape ring sample 700 recording vertical load F and C shape ring sample 700 edge of a knife 703 position be applied on wedge shape loading head is obtained by its special calibrating system.
Calibration device 800 (Figure 12) one end is provided with and the identical loading hole 801 of C shape ring sample 700, can coordinate with power transmission pin 200 to obtain to be produced and the transverse load transmitted by loading head 100 vertical motion.Calibration device 800 other end is the mounting hole 802 simultaneously can installing two same size plate type tensile specimens.
The principle that transverse load is demarcated is: be arranged on by the plate type tensile specimen of two same sizes on calibration device 800, by charger to calibration device load thus elasticity loading is carried out to tensile sample, in loading procedure, measure the elastic deformation of two samples, finally converse tensile load suffered by sample also namely by transverse load that charger is converted to according to Hooke's law.
The enforcement of the utility model technical method comprises transverse load demarcation and C shape ring sample fracture tests two parts.
(1) transverse load demarcates (Figure 13)
Following steps are followed in the demarcation of transverse load:
E) according to the dimensions of the size design plate type tensile specimen of a pair calibration device 800, and the plate type tensile specimen that metal material processing at least 2 pairs of specifications of known elasticity modulus are identical is selected.According to Figure 13, the tensile sample of two same sizes is arranged on calibration device 800, on sample, strainometer is installed respectively simultaneously.
F) calibration device installing sample is placed in charger, controlled loading head 100 carries out loading and guarantees that two plate type tensile specimens are all in elastic range internal strain, measures deflection and the vertical load of plate type tensile specimen.
G) calculate the load of plate type tensile specimen according to Hooke's law and sue for peace, obtaining horizontal opening loads; Make the vertical wedging load of applying with the linear relationship curve between horizontal opening loads, curve determination vertical load is with the conversion ratio between horizontal opening loads thus.
H) plate type tensile specimen separately at least getting a pair of identical specification completes above-mentioned elasticity and loads, and obtains vertical load with the conversion ratio between horizontal opening loads; Demarcate the conversion ratio obtained average to by organizing elasticity more, obtain the load transfer ratio of this test macro.
(2) C shape ring sample fracture test (Figure 10)
Following steps are followed in the fracture test of C shape ring sample:
8) power transmission pin 200, load transfer assembly 300 and coaster 400 are assembled by Figure 11 by joinery and its construction and bolt, form one and the vertical load that loading head 100 applies is converted to transverse load and the force transmission mechanism passing to C shape sample 700.
9) the power transmission pin 200 be arranged symmetrically with is passed C shape ring sample 700, the loaded roll 203 on power transmission pin coordinates with the loading hole 701 of C shape ring sample, can guarantee C shape ring sample its force part Relatively centralized in the process of opening.At installation position, the C shape ring sample edge of a knife 703 position displacement sensor, laterally opening the shift value in process to monitor C shape ring sample 700.
10) bending resistance arm-tie 500 is arranged on above-mentioned force transmission mechanism.
11) sphenoid 101 of loading head 100 is passed the preformed hole of bending resistance arm-tie 500 and coaster 400; Gag lever post is installed at the afterbody of sphenoid 101.
12) be placed on support plinth 600 by coaster 400 one end in the above-mentioned mechanism assembled, sphenoid 101 is placed in the centre position of the square groove of support plinth 600.
13) bare terminal end 102 of loading head 100 is connected and fixes with the upper and lower chuck of testing machine with the bare terminal end of support plinth 600 respectively; Make it move straight down to loading head 100 imposed load, in the process that loading head moves downward, horizontal direction is opened by power transmission pin 200, and drives C shape ring sample 700 to open in the horizontal direction, thus the tearing test achieving C shape ring sample 700 loads;
14) the vertical load F of the loading head 100 and horizontal opening displacement V of C shape ring sample 700 in loading procedure is recorded, by the load transfer demarcated than the horizontal opening loads FH obtaining C shape ring sample 700 that converts;
15) the current crack length a of C shape ring sample in loading procedure is directly or indirectly obtained according to traditional many SAMPLE METHOD, flexibility method or load separation methods scheduling theory, and then according to (the FH of C shape ring sample, V, a) experimental record tries to achieve stress strength factor K, J integration, the fracture property such as CTOD and fatigue crack growth rate of tested metal material.
Compared with prior art, the advantage of technical solutions of the utility model is: (1) devises special calibration system, and the transverse load of C shape ring sample can directly demarcate out; (2) the utility model device can realize the linear elasticity CYCLIC LOADING of C shape ring sample, the realization of this function can be applicable to the Fatigue Crack Growth that traditional flexibility method measures C shape ring sample, and last utility model device only can carry out dullness loading, limited fracture property can only be carried out and measure.
Claims (1)
1. a small size component fracture property proving installation, fracture property for small sized metallic component detects, it is characterized in that, by loading head (100), power transmission pin (200), load transfer assembly (300), coaster (400), bending resistance arm-tie (500) and support plinth (600) six part connect into rigid unitary by joinery and its construction and bolt, thus be configured for the vertical load that loading head (100) applies being converted to transverse load and passing to the loading force transmission mechanism of C shape sample (100), and the bending resistance arm-tie (500) being arranged through loading head (100) on load transfer assembly (300) produces transversely deforming to limit power transmission pin (200) because being subject to curved,
The sphenoid (101) of described loading head (100) both sides is arranged symmetrically with, and the inclination angle of sphenoid (101) ramp is identical; Power transmission pin (200) is platform pole structure, and top is the assembly of semicolumn and 3/4 column type loaded roll (203); Top tenon (201) connects with tension arm-tie (500), and bottom establishes trapezoidal tenon (202) and two through holes be arranged symmetrically with and coaster (400) to be rigidly connected; Loaded roll (203) coordinates with the loading hole of C shape ring sample;
Described load transfer assembly (300) is platform pole structure, top tenon (301) connects with tension arm-tie (500), bottom establishes trapezoidal tenon (302) and two through holes be arranged symmetrically with and coaster (400) to be rigidly connected, the bearing (303) of two same sizes is arranged along with vertically becoming the direction at certain inclination angle in its top, and the inclination angle of the inclination angle of bearing (303) line of centres and the middle sphenoid (101) of loading head (100) is consistent;
Described coaster (400) left and right sides be respectively with power transmission pin (200) trapezoidal tenon (201) and load transfer assembly (300) trapezoidal tenon (301) close-fitting trapezoid-shaped openings and threaded hole, coaster is arranged symmetrically with the rolling bearing (401) of 4 same sizes, to reduce frictional resistance during C shape sample (700) horizontal Load-unload; The square opening (402) be communicated with trapezoid-shaped openings is offered, so that the sphenoid (101) of loading head (100) vertically passes through in the side that coaster is connecting near load transfer assembly;
Described bending resistance arm-tie (500) is provided with top tenon (301) the close-fitting slotted eye of top tenon (201) with power transmission pin (200) and load transfer assembly (300), is provided with the square opening that the sphenoid (101) of being convenient to loading head (100) vertically passes through simultaneously.
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| CN201520076274.9U CN204461896U (en) | 2015-02-03 | 2015-02-03 | Small size component fracture property proving installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181451A (en) * | 2015-02-03 | 2015-12-23 | 西南交通大学 | Small size component fracture performance test method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181451A (en) * | 2015-02-03 | 2015-12-23 | 西南交通大学 | Small size component fracture performance test method and device |
| CN105181451B (en) * | 2015-02-03 | 2018-02-06 | 西南交通大学 | Small size component fracture property method of testing and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20190203 |