CN114813407A - Bidirectional tensile fatigue test sample, test device and test method for T-shaped welded joint - Google Patents
Bidirectional tensile fatigue test sample, test device and test method for T-shaped welded joint Download PDFInfo
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- CN114813407A CN114813407A CN202210365514.1A CN202210365514A CN114813407A CN 114813407 A CN114813407 A CN 114813407A CN 202210365514 A CN202210365514 A CN 202210365514A CN 114813407 A CN114813407 A CN 114813407A
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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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
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
Abstract
The invention discloses a bidirectional tensile fatigue sample, a test device and a test method for a T-shaped welding joint. The testing device comprises a transverse reaction force assembly, a transverse stretching assembly, a vertical stretching assembly and a pair of vertical reaction force assemblies, wherein the transverse reaction force assembly and the transverse stretching assembly can be mutually matched to apply transverse tension to the bottom plate, the vertical stretching assembly and the vertical reaction force assemblies can be mutually matched to apply vertical tension to the vertical plate, and the testing device is matched with the fatigue testing machine to carry out bidirectional stretching fatigue testing on a fatigue sample. The testing device disclosed by the invention has the advantages of bidirectional loading, wide applicability, easiness in operation and the like, and is suitable for bidirectional tensile fatigue performance testing of the T-shaped welding joint.
Description
Technical Field
The invention relates to the technical field of material performance detection, in particular to a bidirectional tensile fatigue test sample, a test device and a test method for a T-shaped welding joint.
Background
T-type welding is a common welding form, and the structure thereof comprises a bottom plate and a vertical plate, wherein a groove is usually formed on one side of the vertical plate, and the vertical plate is vertically welded on the bottom plate. In view of the structural form of the T-shaped welding joint, when the T-shaped welding joint is in service, the bottom plate and the vertical plate are simultaneously loaded, stress concentration exists at the welding position, uneven microstructure and welding residual stress around the welding seam are superposed, and cracking is easily generated at the welding toe, so that the performance test of the T-shaped welding joint is necessarily carried out when related materials and processes are researched and developed and produced.
The existing testing technology mainly comprises bending and stretching performance tests, for example, Chinese patent with publication number CN108801802A adopts a fixed T-shaped welding joint bottom plate, and applies pressure perpendicular to a vertical plate to perform the bending performance test; the Chinese patent with the publication number of CN206235520U adopts a three-point bending mode to test the bending performance of the T-shaped welding joint; chinese patent with publication number CN207610903U discloses a tensile test piece for a T-shaped welding joint, which can be used for checking the tensile property of the T-shaped welding joint; chinese patent publication No. CN201555766U discloses a tensile test fixture for T-shaped welding samples, which can test tensile properties of T-shaped welding samples; chinese patent with publication number CN208304865U discloses a clamping device for a mechanical property test base of a T-shaped welding joint, which can quickly clamp a T-shaped joint sample during testing; chinese patent with publication number CN212674613U discloses a T-shaped welding joint sample base clamping device which can be used for multi-angle mechanical property test; chinese patent publication No. CN112577820A discloses a tensile test method for a T-shaped welded joint, which can be used for tensile strength test of a T-shaped square tube welded joint.
The test methods for the T-shaped welding joint belong to static strength performance tests. Under actual service conditions, a welded structure usually bears periodic load, is suddenly damaged after being in service for a period of time, and presents fatigue failure characteristics, so that the fatigue performance of a T-shaped welded joint needs to be examined. The Chinese patent with publication number CN102192858A adopts an empirical formula to calculate the fatigue property of the T-shaped welding joint, but lacks a test method of a solid sample; the special fixture designed in the chinese patent with publication number CN209589669U can test the fatigue performance of the T-shaped welding joint, but it can only be loaded in the direction of the vertical plate, and the fatigue performance of the T-shaped welding structure is not examined fully.
At present, a fatigue test method for loading fatigue samples of the T-shaped welding joint in two directions simultaneously is lacked, and aiming at the problem, a new method needs to be found for checking the fatigue performance of the T-shaped welding joint.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a bidirectional tensile fatigue test sample, a test device and a test method for a T-shaped welding joint, and aims to solve the problem that the prior test technology lacks simultaneous loading on a bottom plate and a vertical plate of the T-shaped welding joint in two directions and fatigue performance test is carried out.
In order to achieve the first object, the invention provides a biaxial tension fatigue test specimen, which comprises the following specific scheme:
a T-shaped welding joint biaxial tension fatigue sample is of a centrosymmetric structure and comprises a bottom plate and a vertical plate vertically welded in the center of the bottom plate, wherein the bottom plate comprises a transverse working section arranged in the middle and transverse clamping sections arranged at two end parts, and the transverse working section and the two transverse clamping sections are connected through a transition arc; the vertical plate comprises a vertical working section connected with the horizontal working section and a vertical clamping section arranged at the free end part, and the vertical working section is also connected with the vertical clamping section through a transition arc;
round holes are formed in the transverse clamping section and the vertical clamping section.
Furthermore, the transverse working section and the transverse clamping section as well as the vertical working section and the vertical clamping section are integrally formed.
Further, the width of the transverse working section is smaller than that of the transverse clamping section, and the width of the vertical working section is smaller than that of the vertical clamping section.
In order to achieve the second object, the present invention provides a testing apparatus, comprising:
a bidirectional tensile fatigue test device for a T-shaped welding joint is matched with a fatigue testing machine and can carry out bidirectional tensile fatigue test on a fatigue sample, and comprises a transverse reaction force assembly, a transverse stretching assembly, a vertical stretching assembly and a pair of vertical reaction force assemblies, wherein the transverse reaction force assembly and the transverse stretching assembly can be mutually matched to apply transverse tensile force to a bottom plate, and the vertical stretching assembly and the vertical reaction force assemblies can be mutually matched to apply vertical tensile force to a vertical plate;
wherein, horizontal reaction subassembly and horizontal tensile subassembly can be connected with two horizontal clamping sections respectively, and vertical tensile subassembly can be connected with vertical clamping section, and a pair of vertical reaction subassembly can use the riser to hang on horizontal working section as the center.
Further, vertical tensile subassembly includes vertical tensile support, connecting bolt I, vertical tensile connecting rod and vertical tensile flange, vertical tensile support middle part is equipped with U type groove, all be equipped with connecting hole I on two parallel lateral walls of vertical tensile support, connecting bolt I can pass the round hole on connecting hole I and the vertical clamping section in order to be connected vertical tensile subassembly with the riser, vertical tensile support diapire center fixedly connected with vertical tensile connecting rod, vertical tensile connecting rod and vertical tensile flange's centre bore threaded connection, vertical tensile connecting rod's free end and fatigue testing machine's vertical actuator threaded connection.
Further, horizontal tensile subassembly includes horizontal tensile support, connecting bolt II, horizontal tensile connecting rod and horizontal tensile flange, horizontal tensile support middle part is equipped with U type groove, all be equipped with connecting hole II on two parallel lateral walls of horizontal tensile support, connecting bolt II can pass the round hole on connecting hole II and the horizontal centre gripping section and be connected with the one end of horizontal tensile subassembly with the bottom plate, horizontal tensile support diapire center fixedly connected with horizontal tensile connecting rod, horizontal tensile connecting rod and horizontal tensile flange's centre bore threaded connection, the free end of horizontal tensile connecting rod can with fatigue testing machine's horizontal actuator threaded connection.
Further, horizontal counter-force subassembly includes horizontal counter-force support, connecting bolt III, connecting bolt IV, counter-force joint jackscrew, sliding plate and connecting plate, and the sliding plate can be connected with the counter-force frame, the connecting plate can be dismantled with the sliding plate and be connected, horizontal counter-force support include a riser and two parallel arrangement and with the perpendicular fixed connection's of riser diaphragm, the riser passes through counter-force joint jackscrew and connecting bolt IV and realizes dismantling with the connecting plate to be connected, all is equipped with connecting hole III on two diaphragms, connecting bolt III can pass the round hole on connecting hole III and another horizontal centre gripping section in order to be connected horizontal counter-force subassembly with the other end of bottom plate.
Further, vertical counter-force subassembly includes vertical counter-force support, a roller, vertical counter-force connecting rod, vertical counter-force flange and T type joint, vertical counter-force support middle part is equipped with U type groove, vertical counter-force support cooperatees with a roller of wearing to locate on its parallel lateral wall and can block horizontal working segment card at the U-shaped inslot, vertical counter-force support diapire center fixedly connected with vertical counter-force connecting rod, the centre bore threaded connection of vertical counter-force connecting rod and vertical counter-force flange, vertical counter-force connecting rod and T type joint threaded connection, T type joint can connect with fatigue testing machine's workstation looks joint.
Furthermore, two parallel side walls of the vertical counter-force support are provided with connecting holes IV for the support rollers to pass through, the upper surface and the lower surface of each connecting hole IV are both planes, and the upper surface and the lower surface are connected through arcs.
In order to achieve the third object, the invention provides a biaxial tension fatigue test specimen, which comprises the following specific schemes:
a bidirectional tensile fatigue test method for a T-shaped welding joint is characterized in that the method is completed by means of matching of the test device and a fatigue tester, and the test method comprises the following steps:
firstly, connecting a vertical stretching connecting rod with a vertical actuator of a fatigue testing machine, fixing by using a vertical stretching flange and a flange jackscrew, penetrating a vertical plate of a fatigue test sample into a U-shaped groove of a vertical stretching support, penetrating a connecting hole I on the vertical stretching support and a round hole on the vertical plate by using a connecting bolt I, and connecting the vertical plate with a vertical stretching assembly;
secondly, placing the T-shaped joint in a T-shaped groove of a workbench of a fatigue testing machine, fixing a vertical counter-force support and a vertical counter-force connecting rod by using a vertical counter-force flange and a flange jackscrew, adjusting a vertical actuator of the fatigue testing machine, moving a transverse working section of the bottom plate into a U-shaped groove of the vertical counter-force support, penetrating a support roller through a connecting hole IV of the vertical counter-force support, and clamping the bottom plate between the vertical counter-force support and the support roller;
thirdly, connecting a sliding plate in the transverse reaction force assembly to a reaction frame, connecting the connecting plate with the sliding plate through bolts, and connecting a transverse reaction force support with the connecting plate through a reaction force joint jackscrew and a connecting bolt IV; adjusting a counter-force joint jackscrew and a connecting bolt IV to enable a connecting hole III of the transverse counter-force support to be matched with a round hole at one end of the transverse clamping section of the bottom plate, and enabling the connecting bolt III to penetrate through the transverse counter-force support and the bottom plate to enable one end of the bottom plate to be connected with a transverse counter-force assembly;
fourthly, connecting a transverse stretching connecting rod in the transverse stretching assembly with a transverse actuator of the fatigue testing machine, and fixing the transverse stretching connecting rod through a transverse stretching flange and a flange jackscrew; adjusting a transverse actuator of the fatigue testing machine to enable a connecting hole II of the transverse stretching support to be matched with a round hole at the other end of the bottom plate, penetrating a connecting bolt II through the transverse stretching support and the bottom plate, and connecting the other end of the bottom plate with the transverse stretching assembly;
and fifthly, adjusting a vertical actuator and a transverse actuator of the fatigue testing machine to perform fatigue testing.
Has the advantages that:
compared with the existing T-shaped welding joint fatigue test sample, test device and test method, the invention mainly has the following advantages:
(1) the bidirectional tensile fatigue test sample and the test device can simultaneously apply loads in two directions of a T-shaped welding joint bottom plate and a vertical plate to test the fatigue performance;
(2) the test device can adopt samples with different sizes, can use bidirectional loading, can also apply load in only one direction, and can test fatigue, tension or three-point bending performance according to actual needs;
(3) the test device adopts a split design, the support roller or the connecting bolt is matched with the support to connect the fatigue test sample and the test device in a bolt mode, the test sample is adjusted to be centered through the counterforce joint jackscrew and the fatigue test machine actuator, and the test sample is simple and easy to install.
In conclusion, the bidirectional tensile fatigue test sample, the test device and the test method for the T-shaped welding joint have the advantages of bidirectional loading, wide applicability, easiness in operation and the like, and are suitable for fatigue performance test of the T-shaped welding joint.
Drawings
FIG. 1 is a schematic view of the structure of the test apparatus of the present invention.
FIG. 2 is an exploded view of the test apparatus of the present invention.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is a schematic structural view of a fatigue specimen in the present invention.
Graphic notation:
1. a work table;
2. the vertical counterforce component 201, the T-shaped joint 202, the vertical counterforce connecting rod 203, the vertical counterforce flange 204, the vertical counterforce support 2041, the connecting hole IV, 205 and the support roller;
3. the reaction force assembly comprises a transverse reaction force assembly 301, a sliding plate 302, a connecting plate 303, a transverse reaction force support 3031, a vertical plate 3032, a transverse plate 30321, a connecting hole III, 304, a reaction force joint jackscrew 305, a connecting bolt IV, 306 and a connecting bolt III;
4. the vertical stretching assembly 401, the vertical stretching connecting rod 402, the vertical stretching flange 403, the vertical stretching support 4031, the connecting holes I and 404 and the connecting bolt I;
5. the fatigue test piece comprises 501, a bottom plate 5011, a transverse working section 5012, a transverse clamping section 502, a vertical plate 5021, a vertical working section 5022 and a vertical clamping section;
6. a transverse stretching assembly; 601. connecting bolts II, 602, a transverse stretching support 6021, connecting holes II, 603, a transverse stretching connecting rod, 604 and a transverse stretching flange;
7. a circular hole;
8. and (5) jacking a flange.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
A bidirectional tensile fatigue test sample, a test device and a test method of a T-shaped welding joint are matched with a fatigue testing machine and can be used for carrying out bidirectional tensile fatigue performance test on the T-shaped welding joint fatigue test sample, and the following details are provided.
Fatigue test piece
Referring to fig. 4, a fatigue sample 5 is a centrosymmetric T-shaped structure, the fatigue sample 5 includes a bottom plate 501 and a vertical plate 502 vertically welded to the center of the bottom plate 501, the bottom plate 501 includes a transverse working section 5011 arranged in the middle and transverse clamping sections 5012 arranged at two ends, and the transverse working section 5011 and the two transverse clamping sections 5012 are connected through a transition arc; the vertical plate 502 comprises a vertical working section 5021 connected with the transverse working section 5011 and a vertical clamping section 5022 arranged at the free end part, and the vertical working section 5021 and the vertical clamping section 5022 are also connected through a transition arc; round holes 7 are formed in the transverse clamping section 5012 and the vertical clamping section 5022.
In detail, the transverse working section 5011 and the transverse clamping section 5012, and the vertical working section 5021 and the vertical clamping section 5022 are integrally formed.
The thicknesses of the bottom plate 501 and the vertical plate 502 are designed according to actual requirements and can be kept consistent or inconsistent, the width of the transverse working section 5011 is smaller than that of the transverse clamping section 5012, the width of the vertical working section 5021 is smaller than that of the vertical clamping section 5022, and the cross sections of the transverse working section 5011 and the vertical working section 5021 are rectangular.
Test device
A bidirectional tensile fatigue test device for a T-shaped welding joint refers to fig. 1-4, and the test device is matched with a fatigue testing machine to perform bidirectional tensile fatigue test on a fatigue sample, and comprises a transverse reaction force assembly 3, a transverse stretching assembly 6, a vertical stretching assembly 4 and a pair of vertical reaction force assemblies 2, wherein the transverse reaction force assembly 3 and the transverse stretching assembly 6 can be matched with each other to apply transverse tension to a bottom plate 501, and the vertical stretching assembly 4 and the vertical reaction force assemblies 2 can be matched with each other to apply vertical tension to a vertical plate 502;
wherein, horizontal reaction assembly 3 can be connected with two horizontal clamping sections 5012 respectively with horizontal tensile subassembly 6, and vertical tensile subassembly 4 can be connected with vertical clamping section 5022, and a pair of vertical reaction assembly 2 can use riser 502 to hang on horizontal working section 5011 as the center.
In detail, the vertical stretching assembly 4 comprises a vertical stretching support 403, a connecting bolt I404, a vertical stretching connecting rod 401 and a vertical stretching flange 402, a U-shaped groove is formed in the middle of the vertical stretching support 403, connecting holes I4031 are formed in two parallel side walls of the vertical stretching support 403, the connecting bolt I404 can penetrate through a round hole 7 in the connecting holes I4031 and a vertical clamping section 5022 to connect the vertical stretching assembly 4 with a vertical plate 502, the vertical stretching connecting rod 401 is fixedly connected to the center of the bottom wall of the vertical stretching support 403, the vertical stretching connecting rod 401 is in threaded connection with a center hole of the vertical stretching flange 402, and the free end of the vertical stretching connecting rod 401 is in threaded connection with a vertical actuator of the fatigue testing machine.
Horizontal tensile subassembly 6 includes horizontal tensile support 602, connecting bolt II601, horizontal tensile connecting rod 603 and horizontal tensile flange 604, horizontal tensile support 602 middle part is equipped with U type groove, all be equipped with connecting hole II 6021 on two parallel lateral walls of horizontal tensile support 602, connecting bolt II601 can pass round hole 7 on connecting hole II 6021 and the horizontal clamping section 5012 and be connected with the one end of horizontal tensile subassembly 6 with bottom plate 501, horizontal tensile support 602 diapire center fixedly connected with horizontal tensile connecting rod 603, horizontal tensile connecting rod 603 and the centre bore threaded connection of horizontal tensile flange 604, the free end of horizontal tensile connecting rod 603 can be connected with fatigue testing machine's horizontal actuator threaded connection.
The transverse reaction force assembly 3 comprises a transverse reaction force support 303, a connecting bolt III 306, a connecting bolt IV 305, a reaction force joint top thread 304, a sliding plate 301 and a connecting plate 302, the sliding plate 301 can be connected with a reaction frame of the fatigue testing machine, the connecting plate 302 is detachably connected with the sliding plate 301, the transverse reaction force support 303 comprises a vertical plate 3031 and two transverse plates 3032 which are arranged in parallel and are vertically and fixedly connected with the vertical plate 3031, the vertical plate 3031 is detachably connected with the connecting plate 302 through the reaction force joint top thread 304 and the connecting bolt IV 305, the two transverse plates 3032 are respectively provided with a connecting hole III 30321, and the connecting bolt III 306 can penetrate through the connecting hole III 30321 and a round hole 7 on the other transverse clamping section 5012 to connect the transverse reaction force assembly 3 with the other end of the bottom plate 501.
In detail, the distance between the transverse reaction force support 303 and the connecting plate 302 can be adjusted by the reaction force joint jackscrew 304 and the connecting bolt IV 305, so as to meet the centering requirement when connecting fatigue test pieces 5 with different lengths.
The connecting holes IV 2041 for the support rollers 205 to penetrate through are formed in the two parallel side walls of the vertical counter-force support 204, the upper surface and the lower surface of each connecting hole IV 2041 are both planes, and the upper surface and the lower surface are connected through arcs.
Test method
A bidirectional tensile fatigue test method for a T-shaped welding joint is characterized in that the test device is matched with a fatigue testing machine to perform bidirectional tensile fatigue test on a fatigue sample 5, and the test method comprises the following steps:
firstly, connecting a vertical stretching connecting rod 401 with a vertical actuator of a fatigue testing machine, fixing by using a vertical stretching flange 402 and a flange jackscrew 8, penetrating a vertical plate 502 of a fatigue sample 5 into a U-shaped groove of a vertical stretching support 403, penetrating a connecting hole I4031 on the vertical stretching support 403 and a round hole 7 on the vertical plate 502 by using a connecting bolt I404, and connecting the vertical plate 502 with a vertical stretching assembly 4;
secondly, placing a T-shaped joint 201 in a T-shaped groove of a workbench 1 of the fatigue testing machine, fixing a vertical reaction force support 204 and a vertical reaction force connecting rod 202 by using a vertical reaction force flange 203 and a flange jackscrew 8, adjusting a vertical actuator of the fatigue testing machine, moving a transverse working section 5011 of a bottom plate 501 into a U-shaped groove of the vertical reaction force support 204, penetrating a support roller 205 through a connecting hole IV 2041 of the vertical reaction force support 204, and clamping the bottom plate 501 between the vertical reaction force support 204 and the support roller 205;
third, the sliding plate 301 in the lateral reaction force assembly 3 is attached to the reaction frame, the connecting plate 302 is bolted to the sliding plate 301, and the lateral reaction force support 303 is attached to the connecting plate 302 by a reaction force adapter jack 304 and a connecting bolt IV 305; by adjusting the reaction force joint jackscrew 304 and the connecting bolt IV 305, the connecting hole III 30321 of the transverse reaction force support 303 is matched with the round hole 7 at one end of the transverse clamping section 5012 of the bottom plate 501, and the connecting bolt III 306 penetrates through the transverse reaction force support 303 and the bottom plate 501, so that one end of the bottom plate 501 is connected with the transverse reaction force component 3;
fourthly, connecting a transverse stretching connecting rod 603 in the transverse stretching assembly 6 with a transverse actuator of a fatigue testing machine, and fixing the transverse stretching connecting rod by a transverse stretching flange 604 and a flange jackscrew 8; adjusting a transverse actuator of the fatigue testing machine to enable a connecting hole II 6021 of the transverse stretching support 602 to be matched with a round hole 7 at the other end of the bottom plate 501, penetrating a connecting bolt II601 through the transverse stretching support 602 and the bottom plate 501, and connecting the other end of the bottom plate 501 with the transverse stretching assembly 6;
and fifthly, adjusting a vertical actuator and a transverse actuator of the fatigue testing machine to perform fatigue testing.
The foregoing is merely a preferred embodiment of the invention and is not to be construed as limiting the invention in any way. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a T type welded joint biaxial tension fatigue sample which characterized in that: the fatigue test piece (5) is of a T-shaped structure with central symmetry, the fatigue test piece (5) comprises a bottom plate (501) and a vertical plate (502) vertically welded at the center of the bottom plate (501), the bottom plate (501) comprises a transverse working section (5011) arranged in the middle and transverse clamping sections (5012) arranged at two ends, and the transverse working section (5011) and the two transverse clamping sections (5012) are connected through transition arcs; the vertical plate (502) comprises a vertical working section (5021) connected with the transverse working section (5011) and a vertical clamping section (5022) arranged at the free end of the vertical working section (5021), and the vertical working section (5021) and the vertical clamping section (5022) are also connected through a transition arc;
round holes (7) are arranged on the transverse clamping section (5012) and the vertical clamping section (5022).
2. The T-shaped welding joint biaxial tension fatigue test specimen as set forth in claim 1, characterized in that: the transverse working section (5011) and the transverse clamping section (5012) and the vertical working section (5021) and the vertical clamping section (5022) are integrally formed.
3. The T-shaped welding joint biaxial tension fatigue test specimen as set forth in claim 1, characterized in that: the width of the transverse working section (5011) is smaller than that of the transverse clamping section (5012), and the width of the vertical working section (5021) is smaller than that of the vertical clamping section (5022).
4. The utility model provides a T type welded joint biaxial stretching fatigue test device which characterized in that: the testing device is matched with a fatigue testing machine to carry out biaxial tension fatigue testing on the fatigue sample in the claim 1, the testing device comprises a transverse reaction force assembly (3), a transverse stretching assembly (6), a vertical stretching assembly (4) and a pair of vertical reaction force assemblies (2), the transverse reaction force assembly (3) and the transverse stretching assembly (6) can be matched with each other to apply transverse tension to the bottom plate (501), and the vertical stretching assembly (4) and the vertical reaction force assembly (2) can be matched with each other to apply vertical tension to the vertical plate (502);
wherein, horizontal reaction subassembly (3) can be connected with two horizontal clamping sections (5012) respectively with horizontal tensile subassembly (6), and vertical tensile subassembly (4) can be connected with vertical clamping section (5022), and a pair of vertical reaction subassembly (2) can use riser (502) to hang as the center and locate on horizontal working section (5011).
5. The T-shaped welding joint biaxial tension fatigue test device according to claim 4, characterized in that: vertical tensile subassembly (4) are including vertical tensile support (403), connecting bolt I (404), vertical tensile connecting rod (401) and vertical tensile flange (402), vertical tensile support (403) middle part is equipped with U type groove, all be equipped with connecting hole I (4031) on two parallel lateral walls of vertical tensile support (403), connecting bolt I (404) can pass round hole (7) on connecting hole I (4031) and vertical clamping section (5022) in order to be connected vertical tensile subassembly (5024) with riser (502), vertical tensile support (403) diapire center fixedly connected with vertical tensile connecting rod (401), vertical tensile connecting rod (401) and the centre bore threaded connection of vertical tensile flange (402), the free end of vertical tensile connecting rod (401) and fatigue testing machine's vertical actuator threaded connection.
6. The biaxial tension fatigue test device for the T-shaped welding joint as set forth in claim 5, characterized in that: the transverse stretching assembly (6) comprises a transverse stretching support (602), a connecting bolt II (601), a transverse stretching connecting rod (603) and a transverse stretching flange (604), a U-shaped groove is arranged in the middle of the transverse stretching support (602), connecting holes II (6021) are arranged on two parallel side walls of the transverse stretching support (602), the connecting bolt II (601) can pass through the connecting hole II (6021) and a round hole (7) on a transverse clamping section (5012) to connect the transverse stretching component (6) with one end of the bottom plate (501), the center of the bottom wall of the transverse stretching support (602) is fixedly connected with a transverse stretching connecting rod (603), the transverse stretching connecting rod (603) is in threaded connection with a central hole of the transverse stretching flange (604), the free end of the transverse stretching connecting rod (603) can be in threaded connection with a transverse actuator of the fatigue testing machine.
7. The biaxial tension fatigue test device for the T-shaped welding joint as set forth in claim 6, wherein: the transverse reaction force component (3) comprises a transverse reaction force support (303), a connecting bolt III (306), a connecting bolt IV (305), a reaction force joint jackscrew (304), a sliding plate (301) and a connecting plate (302), the sliding plate (301) can be connected with the reaction frame, the connecting plate (302) is detachably connected with the sliding plate (301), the transverse counter-force support (303) comprises a vertical plate (3031) and two transverse plates (3032) which are arranged in parallel and are vertically and fixedly connected with the vertical plate (3031), the vertical plate (3031) is detachably connected with the connecting plate (302) through a counter-force joint jackscrew (304) and a connecting bolt IV (305), the two transverse plates (3032) are respectively provided with a connecting hole III (30321), the connecting bolt III (306) can penetrate through the connecting hole III (30321) and a round hole (7) on the other transverse clamping section (5012) to connect the transverse counter force component (3) with the other end of the bottom plate (501).
8. The biaxial tension fatigue test device for the T-shaped welding joint as set forth in claim 7, characterized in that: vertical reaction subassembly (2) are including vertical reaction support (204), a roller (205), vertical reaction connecting rod (202), vertical reaction flange (203) and T type joint (201), vertical reaction support (204) middle part is equipped with U type groove, vertical reaction support (204) cooperate with a roller (205) of wearing to locate on its parallel lateral wall and can block horizontal working segment (5011) at the U-shaped inslot, vertical reaction support (204) diapire center fixedly connected with vertical reaction connecting rod (202), the centre bore threaded connection of vertical reaction connecting rod (202) and vertical reaction flange (203), vertical reaction connecting rod (202) and T type joint (201) threaded connection, T type joint (201) can be connected with fatigue testing machine's workstation (1) looks joint.
9. The bi-directional tensile fatigue test device for the T-shaped welding joint as recited in claim 8, wherein: and two parallel side walls of the vertical counter-force support (204) are provided with connecting holes IV (2041) for the support rollers (205) to pass through, the upper surface and the lower surface of each connecting hole IV (2041) are both planes, and the upper surface and the lower surface are connected through arcs.
10. A T-shaped welding joint biaxial tension fatigue test method, which is characterized in that the test method is completed by the test device in claim 8 and a fatigue tester, and the test method comprises the following steps:
firstly, a vertical stretching connecting rod (401) is connected with a vertical actuator of a fatigue testing machine, a vertical stretching flange (402) and a flange jackscrew (8) are used for fixing, a vertical plate (502) of a fatigue sample (5) penetrates into a U-shaped groove of a vertical stretching support (403), a connecting bolt I (404) penetrates through a connecting hole I (4031) on the vertical stretching support (403) and a round hole (7) on the vertical plate (502), and the vertical plate (502) is connected with a vertical stretching assembly (4);
secondly, placing a T-shaped joint (201) in a T-shaped groove of a workbench (1) of the fatigue testing machine, fixing a vertical reaction support (204) and a vertical reaction connecting rod (202) by using a vertical reaction flange (203) and a flange jackscrew (8), adjusting a vertical actuator of the fatigue testing machine, moving a transverse working section (5011) of a bottom plate (501) into a U-shaped groove of the vertical reaction support (204), penetrating a support roller (205) from a connecting hole IV (2041) of the vertical reaction support (204), and clamping the bottom plate (501) between the vertical reaction support (204) and the support roller (205);
thirdly, a sliding plate (301) in the transverse reaction force assembly (3) is connected to a reaction frame, the connecting plate (302) is connected with the sliding plate (301) through bolts, and a transverse reaction force support (303) is connected with the connecting plate (302) through a reaction force joint jackscrew (304) and a connecting bolt IV (305); by adjusting a counter force joint jackscrew (304) and a connecting bolt IV (305), a connecting hole III (30321) of a transverse counter force support (303) is matched with a round hole (7) at one end of a transverse clamping section (5012) of a bottom plate (501), and a connecting bolt III (306) penetrates through the transverse counter force support (303) and the bottom plate (501), so that one end of the bottom plate (501) is connected with a transverse counter force component (3);
fourthly, connecting a transverse stretching connecting rod (603) in the transverse stretching assembly (6) with a transverse actuator of the fatigue testing machine, and fixing the transverse stretching connecting rod through a transverse stretching flange (604) and a flange jackscrew (8); adjusting a transverse actuator of the fatigue testing machine, enabling a connecting hole II (6021) of the transverse stretching support (602) to be matched with a round hole (7) at the other end of the bottom plate (501), penetrating a connecting bolt II (601) through the transverse stretching support (602) and the bottom plate (501), and connecting the other end of the bottom plate (501) with the transverse stretching assembly (6);
and fifthly, adjusting a vertical actuator and a transverse actuator of the fatigue testing machine to perform fatigue testing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210365514.1A CN114813407A (en) | 2022-04-08 | 2022-04-08 | Bidirectional tensile fatigue test sample, test device and test method for T-shaped welded joint |
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| CN202210365514.1A CN114813407A (en) | 2022-04-08 | 2022-04-08 | Bidirectional tensile fatigue test sample, test device and test method for T-shaped welded joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116105997A (en) * | 2023-04-13 | 2023-05-12 | 烟台辰宇汽车部件有限公司 | Fatigue testing machine for automobile thrust rod assembly |
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2022
- 2022-04-08 CN CN202210365514.1A patent/CN114813407A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116105997A (en) * | 2023-04-13 | 2023-05-12 | 烟台辰宇汽车部件有限公司 | Fatigue testing machine for automobile thrust rod assembly |
| CN116105997B (en) * | 2023-04-13 | 2023-06-16 | 烟台辰宇汽车部件有限公司 | Fatigue testing machine for automobile thrust rod assembly |
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