CN103344480A - Device for testing crack growth and residual strength of thin-wall plate with stringers - Google Patents
Device for testing crack growth and residual strength of thin-wall plate with stringers Download PDFInfo
- Publication number
- CN103344480A CN103344480A CN2013102394997A CN201310239499A CN103344480A CN 103344480 A CN103344480 A CN 103344480A CN 2013102394997 A CN2013102394997 A CN 2013102394997A CN 201310239499 A CN201310239499 A CN 201310239499A CN 103344480 A CN103344480 A CN 103344480A
- Authority
- CN
- China
- Prior art keywords
- groove
- band
- chuck
- connecting rod
- thin
- 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.)
- Granted
Links
Images
Abstract
The invention discloses a device for testing crack growth and residual strength of a thin-wall plate with stringers. The device comprises buckling-resistant plates, out-of-plane blending-resistant T-shaped beams, reinforcing plates, connecting rods, chucks with adjustment grooves, a lug chuck and an adapter. A test piece is clamped by the lug chuck and the lug chuck is connected to a fatigue testing machine by the adapter so that the test piece is in a state that a load is uniformly distributed at a far-end; the chucks with the adjustment grooves are fixed to the fatigue testing machine; the buckling-resistant plate without a groove and the buckling-resistant plate with grooves are clamped in the center of the test piece and are arranged on the chucks with the adjustment grooves; the reinforcing plates are fixed to the buckling-resistant plates so that buckling-resistant plate rigidity is improved; and the connecting rods are inset into the out-of-plane blending-resistant T-shaped beams and through the adjustment grooves, positions of the connecting rods can be adjusted so that the out-of-plane blending-resistant T-shaped beams closely cling to the buckling-resistant plates and thus test piece out-of-plane blending is prevented. The device is simple and practical, can be installed easily, can effectively complete a crack growth and residual strength test on a thin-wall plate with stringers, is suitable for different types of thin-wall plates with stringers, and has high test efficiency and obvious economical efficiency.
Description
Technical field
The invention belongs to the technical field of structures of product, relate to a kind of device for the crackle expansion of band stringer thin-walled part and residual intensity test.
Background technology
Band stringer thin-walled part is one of aircraft manufacturing design cell that arrives commonly used, the requirement of aeroplane structure design has no longer been satisfied in static strength designing requirement in the past, nowadays aircraft allows to occur fatigue crack during use, even aircaft configuration still has enough residual intensities to continue carrying work when allowing certain main force-summing element to produce fatigure failure, when overhauling next time, can find existing fatigue damage and unlikelyly cause catastrophic consequence that this just requires aeroplane structure design to satisfy the damage tolerance designing requirement.Crackle expansion and the residual intensity test of band stringer thin-walled part are the important component parts of damage tolerance performance test, have listed the relevant examination code requirement of airplane design handbook and seaworthiness department in.
And present test unit can only satisfy the test request of simplification, standardization test specimen, can't satisfy crackle expansion and residual intensity test and the anti-flexing requirement of dissimilar band stringer thin-walled part large-scale experiment spares.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of device for the crackle expansion of band stringer thin-walled part and residual intensity test that designs at the deficiency that has the test unit existence now, this device can carry out crackle expansion and residual intensity test to dissimilar band stringer thin-walled parts, the effect of playing anti-flexing and measuring test parameters, with the influence of research stringer to crack Propagation and residual intensity, the damage tolerance performance of stringer thin-walled part is analyzed.
Technical solution of the present invention is: test unit comprises anti-flexing plate, prevent out-of-plane bending T type beam, the stiffening plate connecting rod, band is adjusted the groove chuck, auricle chuck and adapter, it is four that band is adjusted the groove chuck, be separately fixed on the pillar at testing machine two ends, two connecting rods are connected band perpendicular to the pillar at testing machine two ends and adjust on the groove chuck, prevent from having the groove identical with connecting rod thickness on the out-of-plane bending T type beam, connecting rod embeds in the groove that prevents on the out-of-plane bending T type beam, two blocks of anti-flexing plates are parallel to connecting rod and place band to adjust on the groove chuck, the xsect of anti-flexing plate is U-shaped, have the elongated slot corresponding with stringer position on the testpieces side by side on the bottom surface of anti-flexing plate, the degree of depth of elongated slot is greater than the height of long purlin on the testpieces, the relative clamping testpieces in the bottom surface of two blocks of anti-flexing plates, the center of anti-flexing plate has the crackle observation port, two ends have bolt connecting hole, the two ends of stiffening plate stride across the crackle observation port by screw and are fixed on the anti-flexing plate, and the two ends of auricle chuck clamping testpieces also are fixed on the testing machine by adapter.
Described a kind of device for the crackle expansion of band stringer thin-walled part and residual intensity test is characterized in that described anti-flexing plate holder is held in the testpieces middle part, chooses corresponding anti-flexing plate according to the stringer type.
Described a kind of device for the crackle expansion of band stringer thin-walled part and residual intensity test is characterized in that: described connecting rod and band are adjusted on the surface of contact of groove chuck and are had the adjustment groove, on the connecting rod and to adjust on groove and the band adjustment groove chuck adjustment groove vertical mutually.
Described a kind of device for the crackle expansion of band stringer thin-walled part and residual intensity test, it is characterized in that: the length direction of described connecting rod upper edge connecting rod arranges the adjustment groove, and the adjustment groove on the band adjustment groove chuck is vertical with the adjustment groove on the connecting rod.
Advantage and beneficial effect that the present invention has are: test specimen is connected on the fatigue tester by adapter by the clamping of auricle chuck, can make test specimen obtain the far-end uniformly distributed load, to satisfy the load requirement of test specimen test.In the middle of the anti-flexing plate of slotless and the anti-flexing plate of trough of belt are clamped in test specimen by screw.Wherein, have the elongated slot corresponding with stringer position on the testpieces side by side on the bottom surface of the anti-flexing plate of trough of belt, the bottom surface of anti-like this flexing plate can fit tightly the wallboard part of test specimen, play effectively anti-flexing effect, and the stringer part can not be affected, and this design simultaneously makes that anti-flexing plate structure is simple, and weight is little, rigidity is big, prevents that flexing is effective and is easy to processing.Stiffening plate is fixed on the anti-flexing plate by screw, further increases the rigidity of anti-flexing plate.Prevent that out-of-plane bending T type beam is close on the anti-flexing plate by connecting rod, prevents test specimen generating plane outside sweep.Connecting rod is connected band and adjusts on the groove chuck, and band is adjusted the groove chuck and is fixed on the pillar of testing machine both sides.Mutually perpendicular adjustment groove makes whole anti-flexion device can be close to the testpieces of different-thickness, and is easy to install.A kind of test unit for the crackle expansion of band stringer thin-walled part and residual intensity provided by the invention, applicable to dissimilar band stringer thin-walled parts, and testpieces is played the effect of anti-flexing, finish the residual intensity test of crack expansion test under the different stress ratio load and multiple initial crack length, can be convenient for measuring relevant breaking mechanics parameters such as crack length, crack tip opening displacement, open-angle, the experimental study stringer is to the influence of crackle expansion behavior and residual intensity, for the damage tolerance performance analysis of being with the stringer thin-walled part provides foundation.The present invention compares with existing apparatus, its advantage is that this test unit is simple, practical and easy for installation, not only can effectively finish the crackle expansion of band stringer thin-walled part and residual intensity test, and can test at dissimilar band stringer thin-walled parts, testing efficiency and economy are outstanding.
Description of drawings
Fig. 1 is the formation synoptic diagram of testpieces of the present invention and test unit.
Fig. 2 is test unit Facad structure synoptic diagram of the present invention.
Fig. 3 is test unit structure synoptic diagram of the present invention.
Fig. 4 is the structural representation of the anti-flexing plate of slotless among the present invention.
Fig. 5 is the structural representation that contains the anti-flexing plate of two grooves among the present invention.
Fig. 6 is the structural representation that contains the anti-flexing plate of three grooves among the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
As Figure 1-3, test unit comprises anti-flexing plate 1, prevents out-of-plane bending T type beam 2, stiffening plate 3, connecting rod 4, band adjust groove chuck 5, auricle chuck 6 and adapter 7.It is four that band is adjusted groove chuck 5, and respectively by on the pillar 8 that is bolted to the testing machine two ends, fixing position needs to determine according to the position at test specimen place.Two connecting rods 4 are connected band perpendicular to the pillar 8 at testing machine two ends and adjust on the groove chuck 5, prevent from having on the out-of-plane bending T type beam 2 groove 9 identical with connecting rod 4 thickness, connecting rod 4 embeds in the groove that prevents on the out-of-plane bending T type beam 2, two blocks of anti-flexing plates 1 are parallel to connecting rod 4 and place band to adjust on the groove chuck 5, the xsect of anti-flexing plate 1 is U-shaped, have the elongated slot 10 corresponding with stringer position on the testpieces side by side on the bottom surface of anti-flexing plate 1, the degree of depth of elongated slot is greater than the height of long purlin on the testpieces, the relative clamping testpieces in the bottom surface of two blocks of anti-flexing plates 1, the center of anti-flexing plate 1 has crackle observation port 12, two ends have bolt connecting hole 13, the two ends of stiffening plate 3 stride across crackle observation port 12 by screw and are fixed on the anti-flexing plate 1, and the two ends of auricle chuck 6 clamping testpieces 11 also are fixed on the testing machine by adapter 7.
During test, by auricle chuck 6 clamping test pieces, for test specimen provides the evenly load that satisfies test condition, auricle chuck 6 can be connected on the testing machine of different model by adapter 7.Band is adjusted groove chuck 5 and is fixed on by screw on the pillar 8 of testing machine, and fixing position is selected according to the position of test specimen, makes the crackle observation port 12 on the anti-flexing plate 1 can observe crackle just.Anti-flexing plate 1 is clamped in the centre of test specimen by screw, one side is the anti-flexing plate of slotless, one side is the anti-flexing plate of leaving with the stringer corresponding groove, test at the anti-flexing plate that the test specimen of different stringer types is selected to contain different slots, middle crackle observation port 12 is used for measuring crack length, install and measure the strain gauge of breaking mechanics parameter, can measure and comprise crack mouth opening displacement and breaking mechanics parameters such as crack tip opening displacement, open-angle.Stiffening plate 3 adopts high-strength steel to make, and strides across the crackle observation port and is fixed on the anti-flexing plate 1 by screw, plays the effect that strengthens anti-flexing panel stiffness.Prevent that out-of-plane bending T type beam 2 is fixing by the connecting rod 4 that can embed in its groove, play the effect that prevents out-of-plane bending.Connecting rod 4 prevents that by adjusting groove 14 and adjust groove 15 adjusting positions and fixing, making out-of-plane bending T type beam 2 is close to anti-flexing plate 1.
Claims (4)
1. one kind is used for the device that band stringer thin-walled part crackle is expanded and residual intensity is tested, it is characterized in that, test unit comprises anti-flexing plate (1), prevent out-of-plane bending T type beam (2), stiffening plate (3), connecting rod (4), band is adjusted groove chuck (5), auricle chuck (6) and adapter (7), it is four that band is adjusted groove chuck (5), be separately fixed on the pillar (8) at testing machine two ends, two connecting rods (4) are connected on the band adjustment groove chuck (5) perpendicular to the pillar (8) at testing machine two ends, prevent from having on the out-of-plane bending T type beam (2) groove (9) identical with connecting rod (4) thickness, connecting rod (4) embeds in the groove (9) that prevents on the out-of-plane bending T type beam (2), two blocks of anti-flexing plates (1) are parallel to connecting rod (4) and place band to adjust on the groove chuck (5), the xsect of anti-flexing plate (1) is U-shaped, have the elongated slot (10) corresponding with stringer position on the testpieces side by side on the bottom surface of anti-flexing plate (1), the degree of depth of elongated slot is greater than the height of long purlin on the testpieces, the relative clamping testpieces in the bottom surface of two blocks of anti-flexing plates (1) (11), the center of anti-flexing plate (1) has crackle observation port (12), two ends have bolt connecting hole (13), the two ends of stiffening plate (3) stride across the crackle observation port by screw and are fixed on the anti-flexing plate (1), and the two ends of auricle chuck (6) clamping testpieces also are fixed on the testing machine by adapter (7).
2. a kind of device for the crackle expansion of band stringer thin-walled part and residual intensity test according to claim 1 is characterized in that described anti-flexing plate (1) is clamped in the testpieces middle part, chooses corresponding anti-flexing plate according to the stringer type.
3. according to claim 1 a kind of for the device of being with the expansion of stringer thin-walled part crackle and residual intensity test, it is characterized in that: described connecting rod (4) and band are adjusted on the surface of contact of groove chuck (5) and are had the adjustment groove, and connecting rod (4) is gone up and adjusted groove (14) and band and adjust groove chuck (5) and go up that to adjust groove (15) mutual vertical.
4. according to claim 3 a kind of for the device of being with the expansion of stringer thin-walled part crackle and residual intensity test, it is characterized in that: the length direction of described connecting rod (4) upper edge connecting rod (4) arranges the adjustment groove, and the adjustment groove on the band adjustment groove chuck (5) is vertical with the adjustment groove on the connecting rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310239499.7A CN103344480B (en) | 2013-06-17 | 2013-06-17 | Device for testing crack growth and residual strength of thin-wall plate with stringers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310239499.7A CN103344480B (en) | 2013-06-17 | 2013-06-17 | Device for testing crack growth and residual strength of thin-wall plate with stringers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103344480A true CN103344480A (en) | 2013-10-09 |
| CN103344480B CN103344480B (en) | 2015-06-03 |
Family
ID=49279294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310239499.7A Active CN103344480B (en) | 2013-06-17 | 2013-06-17 | Device for testing crack growth and residual strength of thin-wall plate with stringers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103344480B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697845A (en) * | 2013-12-06 | 2015-06-10 | 中国飞机强度研究所 | Static force/fatigue/damage tolerance test loading system of fuselage panel |
| CN105334162A (en) * | 2015-11-26 | 2016-02-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Aluminum-lithium alloy surface crack and residual intensity relation analysis method |
| CN105842049A (en) * | 2016-05-13 | 2016-08-10 | 中国航空工业集团公司北京航空材料研究院 | Detection method for improving fracture toughness testing precision of aluminum alloy sheet |
| CN105842050A (en) * | 2016-05-13 | 2016-08-10 | 中国航空工业集团公司北京航空材料研究院 | Auxiliary tool for improving fracture toughness testing precision of aluminum alloy sheet |
| CN109612836A (en) * | 2018-11-12 | 2019-04-12 | 南京航空航天大学 | A kind of vertical compression experimental rig suitable for bending big siding |
| CN112694008A (en) * | 2020-12-22 | 2021-04-23 | 中冶建筑研究总院有限公司 | Early warning method and device for fatigue failure of steel crane beam |
| CN112881160A (en) * | 2021-01-12 | 2021-06-01 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Clamp for fatigue test of metal wide plate |
| CN113109170A (en) * | 2021-04-20 | 2021-07-13 | 中国直升机设计研究所 | Composite material long beam strength test device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090066853A (en) * | 2007-12-20 | 2009-06-24 | 주식회사 포스코 | Apparatus for detecting fatigue cracks |
| CN101561459A (en) * | 2009-06-04 | 2009-10-21 | 中国航空工业集团公司西安飞机设计研究所 | Damage-tolerance testing method for lower wall panel of airplane outboard wing |
| CN201574500U (en) * | 2009-09-30 | 2010-09-08 | 无锡济邦隔震技术有限公司 | Supporting type damper for preventing batten-shaped soft steel from bending |
| CN202013310U (en) * | 2010-11-15 | 2011-10-19 | 中国航空工业集团公司北京航空材料研究院 | Testing device used for realizing sheet pulling/pressing fatigue crack growth in corrosive environment |
| CN103015622A (en) * | 2012-12-20 | 2013-04-03 | 北京德力钢结构新技术有限公司 | Assembly composite shearing structural wall board |
-
2013
- 2013-06-17 CN CN201310239499.7A patent/CN103344480B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090066853A (en) * | 2007-12-20 | 2009-06-24 | 주식회사 포스코 | Apparatus for detecting fatigue cracks |
| CN101561459A (en) * | 2009-06-04 | 2009-10-21 | 中国航空工业集团公司西安飞机设计研究所 | Damage-tolerance testing method for lower wall panel of airplane outboard wing |
| CN201574500U (en) * | 2009-09-30 | 2010-09-08 | 无锡济邦隔震技术有限公司 | Supporting type damper for preventing batten-shaped soft steel from bending |
| CN202013310U (en) * | 2010-11-15 | 2011-10-19 | 中国航空工业集团公司北京航空材料研究院 | Testing device used for realizing sheet pulling/pressing fatigue crack growth in corrosive environment |
| CN103015622A (en) * | 2012-12-20 | 2013-04-03 | 北京德力钢结构新技术有限公司 | Assembly composite shearing structural wall board |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697845A (en) * | 2013-12-06 | 2015-06-10 | 中国飞机强度研究所 | Static force/fatigue/damage tolerance test loading system of fuselage panel |
| CN104697845B (en) * | 2013-12-06 | 2017-06-06 | 中国飞机强度研究所 | Fuselage wallboard static(al)/fatigue/damage tolerance test loading system |
| CN105334162A (en) * | 2015-11-26 | 2016-02-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Aluminum-lithium alloy surface crack and residual intensity relation analysis method |
| CN105842049A (en) * | 2016-05-13 | 2016-08-10 | 中国航空工业集团公司北京航空材料研究院 | Detection method for improving fracture toughness testing precision of aluminum alloy sheet |
| CN105842050A (en) * | 2016-05-13 | 2016-08-10 | 中国航空工业集团公司北京航空材料研究院 | Auxiliary tool for improving fracture toughness testing precision of aluminum alloy sheet |
| CN105842050B (en) * | 2016-05-13 | 2017-12-08 | 中国航空工业集团公司北京航空材料研究院 | A kind of auxiliary mould for improving aluminium alloy sheet fracture toughness testing precision |
| CN109612836A (en) * | 2018-11-12 | 2019-04-12 | 南京航空航天大学 | A kind of vertical compression experimental rig suitable for bending big siding |
| CN109612836B (en) * | 2018-11-12 | 2021-09-17 | 南京航空航天大学 | Vertical compression test device suitable for big wallboard of buckling |
| CN112694008A (en) * | 2020-12-22 | 2021-04-23 | 中冶建筑研究总院有限公司 | Early warning method and device for fatigue failure of steel crane beam |
| CN112881160A (en) * | 2021-01-12 | 2021-06-01 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Clamp for fatigue test of metal wide plate |
| CN113109170A (en) * | 2021-04-20 | 2021-07-13 | 中国直升机设计研究所 | Composite material long beam strength test device |
| CN113109170B (en) * | 2021-04-20 | 2022-10-18 | 中国直升机设计研究所 | Composite material long beam strength test device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103344480B (en) | 2015-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103344480B (en) | Device for testing crack growth and residual strength of thin-wall plate with stringers | |
| CN104833590B (en) | Rock II type fracture toughness testing method | |
| CN205656080U (en) | Three -point bending test device of test concrete breaking property ability | |
| CN105181492A (en) | Measuring method for surface strengthening member fatigue crack expansion rate | |
| CN109540642A (en) | A kind of mold of batch making different angle class rock cranny sample | |
| CN104833598A (en) | Observation system for fatigue crack expansion of metal material | |
| KR101494797B1 (en) | Direct Tensile Tester and Method for Testing Using the Same | |
| CN106289977B (en) | Bolt concrete tensile test device and test method | |
| KR101074976B1 (en) | Apparatus for testing compress and tensile | |
| CN202049085U (en) | Fixing fixture of concrete tensile specimens | |
| CN110567798A (en) | Test piece for testing tensile-shear strength of surface fractured rock mass and tensile-shear strength testing method | |
| CN209311194U (en) | A kind of mold of batch making different angle class rock cranny sample | |
| CN106018077A (en) | Test fixture for multi-axial fatigue crack propagation performance of CT samples | |
| CN103196722A (en) | Manufacturing method of concrete biaxial creep specimens, as well as mold and accessories thereof | |
| Ed et al. | Timber compression strength perpendicular to the grain-testing of glulam beams with and without reinforcement | |
| Gu et al. | Effect of drilling process on fatigue life of open holes | |
| CN102252812A (en) | Device for testing strength and distortion of thin-wall part | |
| CN109253902B (en) | Device and method for measuring and marking scale distance of tensile sample | |
| KR101022294B1 (en) | Jig for testing material of flat plate using pin load | |
| CN111521466A (en) | Opening structure corner fatigue sample and special fixture thereof | |
| Khalate et al. | Detection of cracks present in composite cantilever beam by vibration analysis technique | |
| Al-Sherrawi et al. | Effect of diaphragms on shear lag in steel box girders | |
| CN105424472A (en) | Adjustable-stiffness clamp for high-frequency fatigue testing machine | |
| CN115508187A (en) | Load-keeping device | |
| CN108120360B (en) | A kind of model in wind tunnel mass property measurement fixture design method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |