Tool for testing mechanical property of composite material annular sample

Abstract

The utility model relates to the technical field of composite material mechanical property testing, in particular to a tool for testing the mechanical property of a composite material annular sample, which comprises an upper tension disc and a lower tension disc which are oppositely arranged up and down, and the upper tension disc comprises a first C-shaped frame arranged on a first bottom plate; the center position of the first C-shaped frame is connected with a first connecting rod; a first semicircular separation disc is mounted on the first bottom plate; two deflection rod limiting devices are oppositely arranged on the outer side of the first C-shaped frame; the lower tension disc comprises a second C-shaped frame mounted on the second bottom plate, and the center position of the second C-shaped frame is connected with a second connecting rod; a second semicircular separation disc is mounted on the second bottom plate; two deflectometer fixing devices are oppositely arranged on the outer side of the second C-shaped frame; according to the utility model, the detachable separation disc is introduced, so that the preparation process and cost of the tool are reduced, and the mechanical property test of composite material annular samples with different sizes can be conveniently carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material mechanical property testing, in particular to a tool used for composite material annular sample mechanical property testing. Background Art

[0002] With the rapid development of materials science, various new materials with excellent performance, such as fiber-reinforced composite materials, have emerged continuously and are widely used in engineering fields such as aviation, aerospace, electric power, shipbuilding, petrochemicals, etc.; however, the diverse materials and numerous processing technologies lead to great differences in the properties of materials. In order to give full play to the effects of various new materials, material performance tests and component structural tests have become the key to material design and structural design; but the current composite material annular specimen tension disk has the problem of adapting to a single sample size, resulting in high cost and complex operation of material performance tests.

[0003] Therefore, in view of the above problems, the utility model urgently needs to provide a tool for testing the mechanical properties of composite material annular specimens. Utility Model Content

[0004] The utility model aims to provide a tool for testing the mechanical properties of composite material annular specimens, and solves the problems of single size of adapted specimens in the prior art through the design of a detachable separation plate.

[0005] A tool for testing the mechanical properties of a composite material annular specimen, comprising an upper tension plate and a lower tension plate arranged opposite to each other.

[0006] The upper tension plate includes a first C-shaped frame, one side of the first C-shaped frame is connected to a first bottom plate with the same appearance as the first C-shaped frame, a first connecting rod is also extended upward from the center of the first C-shaped frame, a first locking ring is screwed on the first connecting rod, and a first limit pin hole for connecting to the upper fixture of the universal testing machine is also provided at the top of the first connecting rod; a first semicircular separation plate can also be detachably mounted on the first bottom plate; two deflection rod limit devices are relatively provided on the outer side of the first C-shaped frame;

[0007] The lower tension plate includes a second C-shaped frame, one side of the second C-shaped frame is connected to a second base plate with the same appearance as the second C-shaped frame, and a second connecting rod is extended upward from the center position of the second C-shaped frame. A second locking ring is screwed on the second connecting rod, and a second limit pin hole for connecting to the lower clamp of the universal testing machine is also provided at the top of the second connecting rod; a second semicircular separation plate can also be detachably installed on the second base plate; two deflection meter fixing devices are relatively provided on the outer side of the second C-shaped frame.

[0008] Furthermore, two first sample anti-detachment limiters are symmetrically installed on the first semicircular separation disk, and each first sample anti-detachment limiter is detachably connected to the first semicircular separation disk via a first screw.

[0009] Furthermore, two second sample anti-detachment limiters are symmetrically installed on the second semicircular separation disc, and each second sample anti-detachment limiter is detachably connected to the second semicircular separation disc via a second screw.

[0010] Furthermore, the deflection rod limiting device is arranged in an L shape, one end of the deflection rod limiting device is installed on the outer surface of the first C-shaped frame, and the other end is provided with a horizontally arranged baffle.

[0011] Furthermore, the deflection meter fixing device includes a fixed base installed on the outer surface of the second C-shaped frame, a fixed arm extending upward is installed in the fixed base, the other end of the fixed arm is connected to a horizontally arranged mounting frame, the upper surface of the mounting frame is provided with a deflection meter mounting hole passing through the mounting frame, and one side of the deflection meter mounting hole is also provided with an adjustment groove passing through the mounting frame, and adjustment screws for adjusting the width of the adjustment groove are installed on both sides of the adjustment groove.

[0012] Furthermore, each deflection meter fixing device and each deflection rod limiting device are arranged opposite to each other up and down, and the deflection meter mounting hole and the baffle plate of the deflection rod limiting device are arranged opposite to each other up and down.

[0013] Furthermore, the first semicircular separation disc is connected to the first bottom plate via a third screw, and the second semicircular separation disc is connected to the second bottom plate via a fourth screw.

[0014] Furthermore, the first C-shaped frame is connected to each deflection rod limiting device via screws, and the second C-shaped frame is connected to each deflection meter fixing device via screws.

[0015] Furthermore, the first screw, the second screw, the third screw and the fourth screw are all made of metal.

[0016] Furthermore, the upper tension plate and the lower tension plate are both made of 304 stainless steel.

[0017] The tooling for testing the mechanical properties of composite material annular specimens provided by the utility model has the following improvements compared with the prior art:

[0018] The tooling provided by the utility model for mechanical property testing of composite material annular specimens is based on the difficulty of single size in mechanical property testing of composite material annular specimens. By designing a splicable loading structure, a detachable separation plate is introduced. Different separation plates can be replaced according to the size of the specimen, thereby reducing the preparation process and cost of the tooling and facilitating mechanical property testing of composite material annular specimens of different sizes. At the same time, the utility model is also equipped with a specimen anti-slip limiter to avoid operational accidents caused by specimen slippage and to avoid affecting the success rate of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram (stereoscopic diagram) of the installation of the tooling for testing the mechanical properties of composite material annular specimens described in the utility model;

[0021] Figure 2 It is a structural schematic diagram (stereoscopic diagram) of the upper tension plate described in the utility model;

[0022] Figure 3 It is a structural schematic diagram (stereoscopic diagram) of the lower tension plate described in the utility model;

[0023] Figure 4 It is a structural schematic diagram (stereoscopic diagram) of the deflectometer fixing device described in the utility model.

[0024] Description of reference numerals:

[0025] 101. First base plate; 102. First C-shaped frame; 103. First connecting rod; 104. First semicircular separation plate; 105. First specimen anti-slip limiter; 106. Deflection rod limiter; 107. First locking ring; 108. First limit pin hole; 109. First screw; 110. Third screw; 201. Second base plate; 202. Second C-shaped frame; 203. Second connecting rod; 204. Second semicircular separation plate; 205. Second specimen anti-slip limiter; 206. Deflection meter fixing device; 2061. Fixed base; 2062. Fixed arm; 2063. Mounting bracket; 2064. Deflection meter mounting hole; 2065. Adjusting screw; 207. Second locking ring; 208. Second limit pin hole; 209. Second screw; 210. Fourth screw; 3. Annular specimen. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1 , Figure 2 , Figure 3 As shown, the utility model provides a tool for testing the mechanical properties of a composite material annular specimen, comprising an upper tension plate and a lower tension plate arranged opposite to each other.

[0030] The upper tension plate includes a first C-shaped frame 102, one side of the first C-shaped frame 102 is connected to a first bottom plate 101 having the same appearance as the first C-shaped frame 102, a first connecting rod 103 is also extended upward from the center of the first C-shaped frame 102, a first locking ring 107 is screwed on the first connecting rod 103, and a first limit pin hole 108 for connecting to the upper fixture of the universal testing machine is also provided at the top of the first connecting rod 103; a first semicircular separation plate 104 can also be detachably installed on the first bottom plate 101; two deflection rod limit devices 106 are relatively provided on the outer side of the first C-shaped frame 102;

[0031] The lower tension plate includes a second C-shaped frame 202, one side of which is connected to a second base plate 201 having the same appearance as the second C-shaped frame 202, and a second connecting rod 203 is also extended upward from the center position of the second C-shaped frame 202, a second locking ring 207 is screwed on the second connecting rod 203, and a second limit pin hole 208 for connecting to the lower clamp of the universal testing machine is also provided at the top of the second connecting rod 203; a second semicircular separation plate 204 can also be detachably installed on the second base plate 201; two deflection meter fixing devices 206 are relatively provided on the outer side of the second C-shaped frame 202.

[0032] The tooling provided by the utility model for mechanical property testing of composite material annular specimens is based on the difficulty of single size in mechanical property testing of composite material annular specimens. By designing a splicable loading structure, a detachable separation plate is introduced. Different separation plates can be replaced according to the size of the specimen, thereby reducing the preparation process and cost of the tooling and facilitating mechanical property testing of composite material annular specimens of different sizes. At the same time, the utility model is also equipped with a specimen anti-slip limiter to avoid operational accidents caused by specimen slippage and to avoid affecting the success rate of the test.

[0033] In the utility model, when the upper tension disk is correspondingly installed on the upper clamp of the universal testing machine through the first locking ring 107 and the first limit pin hole 108, a first slot is provided on the lower surface of the upper clamp, and first side holes penetrating the upper clamp are provided on both sides of the first slot. First, the first connecting rod 103 with the first locking ring 107 is inserted into the first slot of the upper clamp, and a pin matching the first side hole is used to simultaneously penetrate the first side hole and the first limit pin hole 108 of the upper clamp to fix the upper clamp and the upper tension disk; the inner surface of the first locking ring 107 and the outer surface of the first connecting rod 103 are provided with mutually matching threads, and the first locking ring 107 is used to lock the upper clamp and the first connecting piece along the threads to complete the installation of the upper tension disk.

[0034] In the utility model, when the lower tension disk is correspondingly installed on the lower clamp of the universal testing machine through the second locking ring 207 and the second limit pin hole 208, a second slot is provided on the upper surface of the lower clamp, and second side holes penetrating the lower clamp are provided on both sides of the second slot. First, the second connecting rod 203 with the second locking ring 207 is inserted into the second slot of the lower clamp, and the pin matching the second side hole is used to simultaneously penetrate the second side hole and the second limit pin hole 208 of the lower clamp to fix the lower clamp and the lower tension disk; the inner surface of the second locking ring 207 and the outer surface of the second connecting rod 203 are provided with mutually matching threads, and the second locking ring 207 is used to lock the lower clamp and the second connecting piece along the threads to complete the installation of the lower tension disk.

[0035] like Figure 1 , Figure 2As shown, two first sample anti-dropout limiters 105 are symmetrically mounted on the first semicircular separation disc 104 , and each first sample anti-dropout limiter 105 is detachably connected to the first semicircular separation disc 104 via a first screw 109 .

[0036] like Figure 1 , Figure 3 As shown, two second sample anti-dropout limiters 205 are symmetrically mounted on the second semicircular separation disc 204 , and each second sample anti-dropout limiter 205 is detachably connected to the second semicircular separation disc 204 via a second screw 209 .

[0037] like Figure 1 , Figure 2 As shown, the deflection rod limiting device 106 is arranged in an L shape, one end of the deflection rod limiting device 106 is installed on the outer surface of the first C-shaped frame 102, and the other end is provided with a horizontally arranged baffle.

[0038] like Figure 1 , Figure 4 As shown, the deflection meter fixing device 206 includes a fixed base 2061 installed on the outer surface of the second C-shaped frame 202, and an upwardly extending fixed arm 2062 is installed in the fixed base 2061. The other end of the fixed arm 2062 is connected to a horizontally arranged mounting frame 2063. The upper surface of the mounting frame 2063 is provided with a deflection meter mounting hole 2064 that passes through the mounting frame 2063, and one side of the deflection meter mounting hole 2064 is also provided with an adjustment groove that passes through the mounting frame 2063, and adjustment screws 2065 for adjusting the width of the adjustment groove are installed on both sides of the adjustment groove.

[0039] like Figure 1 As shown, each deflection meter fixing device 206 is disposed vertically opposite to each deflection rod limiting device 106 , and the deflection meter mounting hole 2064 is disposed vertically opposite to the baffle of the deflection rod limiting device 106 .

[0040] In the utility model, the deflection meter is used to measure the deformation of the annular specimen 3 during the test, and includes a handheld end, a measuring instrument, a display screen located on one side of the measuring instrument, and a measuring end. The handheld end is vertically installed on one side of the lower tension plate using a deflection meter fixing device 206, and the other end is in contact and connected with the deflection rod limit device 106. When displacement occurs between the upper and lower tension plates, the deformation of the annular specimen 3 can be read from the display screen.

[0041] like Figure 1 , Figure 2 , Figure 3 As shown, the first semicircular separation disc 104 is connected to the first bottom plate 101 via a third screw 110 , and the second semicircular separation disc 204 is connected to the second bottom plate 201 via a fourth screw 210 .

[0042] In the utility model, the first semicircular separation disk 104 and the second semicircular separation disk 204 can be replaced according to different sizes of composite annular specimens through the third screw 110 and the fourth screw 210, so as to solve the problem of single size of adaptable specimens existing in the current composite annular specimen tension disk.

[0043] like Figure 1 , Figure 2 , Figure 3 As shown, the first C-shaped frame 102 and each deflection rod limiting device 106 are connected by screws, and the second C-shaped frame 202 and each deflection meter fixing device 206 are connected by screws.

[0044] In this embodiment, the first screw 109 , the second screw 209 , the third screw 110 and the fourth screw 210 are all made of metal.

[0045] In this embodiment, the upper tension plate and the lower tension plate are both made of 304 stainless steel.

[0046] The implementation method of the utility model comprises the following steps:

[0047] 1) Assemble the tooling for testing the mechanical properties of composite material annular specimens of the utility model, and respectively install the upper tension plate and the lower tension plate on the upper and lower fixtures of the universal testing machine through the first locking ring 107, the first limiting pin hole 108 and the second locking ring 207, the second limiting pin hole 208;

[0048] 2) Remove the first sample anti-dropout limiters 105 and the second sample anti-dropout limiters 205, surround the annular sample 3 on the first semicircular separation disk 104 and the second semicircular separation disk 204, and install the first sample anti-dropout limiters 105 and the second sample anti-dropout limiters 205 on the outside of the annular sample 3 to fix the annular sample 3;

[0049] 3) Start the universal testing machine, apply load to the annular specimen 3 evenly and continuously until the annular specimen 3 is destroyed, record the destruction load, remove the annular specimen 3 and the tooling for mechanical property testing of composite material annular specimens, and complete the mechanical property testing of composite material annular specimens.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A tool for testing the mechanical properties of composite material annular specimens, characterized by: It includes an upper tension plate and a lower tension plate which are arranged relatively up and down. The upper tension disk comprises a first C-shaped frame (102), one side of the first C-shaped frame (102) is connected to a first bottom plate (101) having the same appearance as the first C-shaped frame (102), a first connecting rod (103) is also extended upward from the center of the first C-shaped frame (102), a first locking ring (107) is screwed on the first connecting rod (103), and a first limiting pin hole (108) for connecting to an upper fixture of a universal testing machine is also provided at the top of the first connecting rod (103); a first semicircular separation disk (104) can also be detachably mounted on the first bottom plate (101); and two deflection rod limiting devices (106) are relatively provided on the outer side of the first C-shaped frame (102); The lower tension disk comprises a second C-shaped frame (202), one side of which is connected to a second bottom plate (201) having the same appearance as the second C-shaped frame (202), a second connecting rod (203) extending upward from the center of the second C-shaped frame (202), a second locking ring (207) being screwed onto the second connecting rod (203), and a second limit pin hole (208) for connecting to a lower fixture of a universal testing machine being provided at the top end of the second connecting rod (203); a second semicircular separation disk (204) can also be detachably mounted on the second bottom plate (201); and two deflection meter fixing devices (206) are provided opposite to each other on the outer side of the second C-shaped frame (202).

2. The tooling for testing mechanical properties of composite material annular specimens according to claim 1, characterized in that: Two first sample anti-dropout limiters (105) are symmetrically mounted on the first semicircular separation disc (104), and each first sample anti-dropout limiter (105) is detachably connected to the first semicircular separation disc (104) via a first screw (109).

3. The tooling for testing mechanical properties of composite material annular specimens according to claim 2, characterized in that: Two second sample anti-dropout limiters (205) are symmetrically mounted on the second semicircular separation disc (204), and each second sample anti-dropout limiter (205) is detachably connected to the second semicircular separation disc (204) via a second screw (209).

4. The tooling for testing mechanical properties of composite material annular specimens according to claim 3, characterized in that: The deflection rod limiting device (106) is arranged in an L shape, one end of the deflection rod limiting device (106) is installed on the outer surface of the first C-shaped frame (102), and the other end is provided with a horizontally arranged baffle.

5. The tooling for testing mechanical properties of composite material annular specimens according to claim 4, characterized in that: The deflectometer fixing device (206) comprises a fixing base (2061) installed on the outer surface of the second C-shaped frame (202), an upwardly extending fixing arm (2062) is installed in the fixing base (2061), the other end of the fixing arm (2062) is connected to a horizontally arranged mounting frame (2063), the upper surface of the mounting frame (2063) is provided with a deflectometer mounting hole (2064) penetrating the mounting frame (2063), one side of the deflectometer mounting hole (2064) is also provided with an adjustment slot penetrating the mounting frame (2063), and adjustment screws (2065) for adjusting the width of the adjustment slot are installed on both sides of the adjustment slot.

6. The tooling for testing mechanical properties of composite material annular specimens according to claim 5, characterized in that: Each deflectometer fixing device (206) and each deflection rod limiting device (106) are arranged vertically opposite to each other, and the deflectometer mounting hole (2064) and the baffle of the deflection rod limiting device (106) are arranged vertically opposite to each other.

7. The tooling for testing mechanical properties of composite material annular specimens according to claim 6, characterized in that: The first semicircular separation disc (104) is connected to the first bottom plate (101) via a third screw (110), and the second semicircular separation disc (204) is connected to the second bottom plate (201) via a fourth screw (210).

8. The tooling for testing mechanical properties of composite material annular specimens according to claim 7, characterized in that: The first C-shaped frame (102) and each deflection rod limiting device (106) are connected via screws, and the second C-shaped frame (202) and each deflection meter fixing device (206) are connected via screws.

9. The tooling for testing mechanical properties of composite material annular specimens according to claim 8, characterized in that: The first screw (109), the second screw (209), the third screw (110) and the fourth screw (210) are all made of metal.

10. The tooling for testing mechanical properties of composite material annular specimens according to claim 9, characterized in that: The upper tension plate and the lower tension plate are both made of 304 stainless steel.

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