Torsion test device based on photoelastic instrument

Abstract

The utility model discloses a torsion test device based on a photoelastic instrument, which comprises a light source and an imaging device, a photoelastic instrument main body is arranged between the light source and the imaging device, and the photoelastic instrument main body comprises a front polarization frame and a rear polarization frame which are respectively provided with a front polarizer and a rear polarizer. A test piece loading frame is installed between the front polarization frame and the rear polarization frame, a torsion device is arranged in the test piece loading frame and is composed of a torsion sleeve, a driving motor, a rotating shaft, a rotating locking device and a fastening screw rod, the torsion sleeve is rotationally arranged in the horizontal direction of the inner side of the test piece loading frame, and the rotating shaft is rotationally arranged in the horizontal direction of the inner side of the torsion sleeve. The device has the beneficial effects that a torsion test and a photoelastic method are combined, the stress and deformation behaviors of the test piece under the action of a torsion couple are analyzed by observing the optical characteristics of the test piece, and the change condition and stress distribution of the test piece in the damage process are observed.

Description

TECHNICAL FIELD

[0001] The utility model relates to torsion test technical field, concretely related to a torsion test device based on photoelastic instrument. BACKGROUND

[0002] Photoelasticity is a kind of optical stress measurement method, can measure the stress of the transparent material component of the more complex geometry and load condition, especially can measure the stress concentration and internal stress problem that other methods are difficult to solve. Thus, the academic and engineering circles attach great importance to it, and photoelasticity has become an effective tool for solving the stress analysis of complex engineering structure.

[0003] At present, torsion test is an important test for observing the failure mode of the test piece under the action of torsion couple in mechanics, and the traditional torsion test device cannot directly observe the change of test piece failure and stress distribution.

[0004] For the problems in the related art, no effective solution has been proposed so far. UTILITY MODEL CONTENT

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a torsion test device based on photoelastic instrument.

[0006] In order to achieve the above purpose, the utility model is realized through the following technical scheme, a torsion test device based on photoelastic instrument, comprising a light source and an imaging device, a photoelastic instrument main body is arranged between the light source and the imaging device, the photoelastic instrument main body comprises a front polarization frame and a rear polarization frame respectively provided with a front polarization mirror and a rear polarization mirror, a test piece loading frame is installed between the front polarization frame and the rear polarization frame, a torsion device is arranged in the test piece loading frame, the torsion device is composed of a torsion sleeve, a driving motor, a rotating shaft, a rotating locking device and a fastening screw, the torsion sleeve is rotationally arranged on the inner side of the test piece loading frame in the horizontal direction, the driving motor is installed on the outer side of the test piece loading frame, and the output end of the driving motor is connected with the torsion sleeve through the rotating shaft.

[0007] Preferably, a rotating locking device is arranged in the horizontal direction on the side of the test piece loading frame away from the torsion sleeve, one end of the rotating locking device is connected with a test piece, the other end of the test piece is connected with the torsion sleeve through the rotating shaft, and the driving motor is electrically connected with the controller and the digital display instrument respectively.

[0008] Preferably, the rotating locking device comprises a test piece fixing sleeve in the test piece loading frame, and the test piece fixing sleeve is rotationally connected with the inner wall of the test piece loading frame, threaded fastening screws are arranged at the upper and lower ends of the test piece fixing sleeve, and one end of the fastening screw in the test piece fixing sleeve is connected with an arc-shaped fastening piece through a bearing.

[0009] Preferably, a fastening support is arranged between the front polarizing frame and the rear polarizing frame, the front polarizing frame, the rear polarizing frame and the test piece loading frame are fastened and connected through the fastening support, the front polarizing frame and the rear polarizing frame are fixed on the base through the fastening support, an imaging device support is also fixed on the base, and the imaging device is fixed on the imaging device support.

[0010] Preferably, the light source is a liquid crystal computer display, and the imaging device is a digital camera, wherein the liquid crystal computer display is connected with a computer host, and the output end of the digital camera is connected with a computer processor.

[0011] The utility model provides a torsion test device based on photoelastic instrument has the beneficial effects as follows:

[0012] Through setting up the photoelastic instrument main body between the light source and the imaging device, when using, the light source and the imaging device are opened, then the photoelastic instrument main body is started, the controller controls the driving motor, the driving motor drives the rotating shaft to rotate, the rotating shaft drives the torsion sleeve to provide the torsion force for the test piece rotation, the digital display instrument is used to display the torsion value, so that the change condition and stress distribution of the test piece in the torsion process can be directly observed, the torsion test and the photoelastic method are combined, the stress and deformation behavior of the test piece under the torsion couple are analyzed according to the optical characteristics of the test piece, and the change condition and stress distribution of the test piece in the destruction process are observed. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0014] Figure 1 It is a front view of a torsion test device based on photoelastic instrument according to the utility model embodiments;

[0015] Figure 2 It is a front view of the photoelastic instrument main body in the torsion test device based on photoelastic instrument according to the utility model embodiments;

[0016] Figure 3It is a structure schematic view of the rotating locking device in the torsion test device based on the photoelastic instrument according to the embodiment of the utility model.

[0017] In the drawing:

[0018] 1, light source; 2, imaging device; 3, photoelastic instrument main body; 4, front polarizer; 5, rear polarizer; 6, front polarizing frame; 7, rear polarizing frame; 8, test piece loading frame; 9, torsion device; 10, torsion sleeve; 11, driving motor; 12, rotating shaft; 13, rotating locking device; 14, fastening screw; 15, controller; 16, digital display instrument; 17, fastening support; 18, imaging device support; 19, base; 20, test piece; 21, test piece fixing sleeve; 22, arc-shaped fastening piece. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Please refer to Figures 1-3 The utility model provides a kind of torsion test device based on photoelastic instrument, including light source 1 and imaging device 2, photoelastic instrument main body 3 is arranged between the light source 1 and the imaging device 2, the photoelastic instrument main body 3 includes front polarizing frame 6 and rear polarizing frame 7 respectively installed with front polarizer 4 and rear polarizer 5, test piece loading frame 8 is installed between the front polarizing frame 6 and the rear polarizing frame 7, torsion device 9 is provided in the test piece loading frame 8, the torsion device 9 is composed of torsion sleeve 10, driving motor 11, rotating shaft 12, rotating locking device 13 and fastening screw 14, the torsion sleeve 10 is rotationally arranged in the inside horizontal direction of the test piece loading frame 8, the driving motor 11 is installed on the outside of the test piece loading frame 8, and the output end of the driving motor 11 is connected with the torsion sleeve 10 by the rotating shaft 12, by being provided with photoelastic instrument main body 3 between light source 1 and imaging device 2, when using, light source 1 and imaging device 2 are opened, then photoelastic instrument main body 3 is started, then driving motor 11 is controlled by controller 15, driving motor 11 drives rotating shaft 12 to rotate, rotating shaft 12 drives torsion sleeve 10 to provide torsional force for the rotation of test piece 20, and digital display instrument 16 is used to display torsional force value, so that the change condition and stress distribution of test piece 20 in the torsion process can be directly observed.

[0021] In an embodiment, please refer to the drawings in the specification Figure 2As shown, the horizontal direction side of the torsion sleeve 10 is connected with the rotating shaft 12, one end of the rotating shaft 12 is connected with the driving motor 11, the side of the test piece loading frame 8 far away from the torsion sleeve 10 is horizontally provided with the rotary locking device 13, the rotary locking device 13 is provided with the fastening screw 14 above, one end of the rotary locking device 13 is connected with the test piece 20, the other end of the test piece 20 is connected with the torsion sleeve 10 through the rotating shaft 12, and the driving motor 11 is electrically connected with the controller 15 and the digital display instrument 16 respectively. The test piece 20 is fixed between the torsion sleeve 10 and the rotary locking device 13 through the cooperation of the torsion sleeve 10, the rotating shaft 12 and the rotary locking device 13.

[0022] In an embodiment, referring to the drawings Figure 3 As shown, the rotary locking device 13 comprises the test piece fixing sleeve 21 located in the test piece loading frame 8, and the test piece fixing sleeve 21 is rotationally connected with the inner wall of the test piece loading frame 8, the upper and lower ends of the test piece fixing sleeve 21 are provided with the fastening screw 14 in threaded penetration, and one end of the fastening screw 14 located in the test piece fixing sleeve 21 is connected with the arc-shaped fastening piece 22 through a bearing. When the test piece 20 is fixed, one end of the test piece 20 is put into the test piece fixing sleeve 21, the fastening screw 14 is rotated, the arc-shaped fastening piece 22 is driven by the fastening screw 14 to adhere to the outer wall of the test piece 20 from both sides through the cooperation of the bearing, so that the test piece 20 is fixed.

[0023] In an embodiment, referring to the drawings Figure 1 As shown, the fastening support 17 is arranged between the front polarizing frame 6 and the rear polarizing frame 7, the front polarizing frame 6, the rear polarizing frame 7 and the test piece loading frame 8 are fastened and connected through the fastening support 17, the front polarizing frame 6 and the rear polarizing frame 7 are fixed on the base 19 through the fastening support 17, the imaging device support 18 is also fixed on the base 19, and the imaging device 2 is fixed on the imaging device support 18. The front polarizing frame 6, the rear polarizing frame 7 and the test piece loading frame 8 are connected and fastened through the fastening support 17, and the imaging device support 18 is used for supporting the imaging device 2.

[0024] In an embodiment, referring to the drawings Figure 1 As shown, the light source 1 is a liquid crystal computer display, and the imaging device 2 is a digital camera, wherein the liquid crystal computer display is connected with a computer host, the screen can provide light sources of various colors, and the output end of the digital camera is connected with a computer processor, the computer processor processes the output information and displays the information on another display of the computer processor.

[0025] In actual application, the photoelasticity body 3 is arranged between the light source 1 and the imaging device 2, in use, the light source 1 and the imaging device 2 are turned on, then the photoelasticity body 3 is started, the two ends of the test piece 20 are fixed in the torsion sleeve 10 and the test piece fixing sleeve 21 respectively, then the controller 15 controls the driving motor 11, the driving motor 11 drives the rotating shaft 12 to rotate, the rotating shaft 12 drives the torsion sleeve 10 to rotate and provides the torsion force for the test piece 20, the digital display instrument 16 is used for displaying the torsion value, so that the change condition and the stress distribution of the test piece 20 in the torsion process can be directly observed, the torsion test and the photoelasticity method are combined, the stress and deformation behaviors of the test piece under the action of the torsion couple are analyzed by observing the optical characteristics of the test piece, and the change condition and the stress distribution of the test piece in the destruction process are observed.

[0026] Although the present specification is described according to the embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, the skilled in the art should take the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments which can be understood by the skilled in the art.

Claims

1. A photo-elasticity-based torsion testing device, characterized by, The utility model provides a kind of optical source (1) and imaging device (2), the optical source (1) and the imaging device (2) between being provided with photoelastic body (3), the photoelastic body (3) includes respectively mounting front polarizer (4) and rear polarizer (5) front polarizing frame (6) and rear polarizing frame (7), front polarizing frame (6) and rear polarizing frame (7) between mounting test piece loading frame (8), torsion device (9) is provided in test piece loading frame (8), the torsion device (9) is composed of torsion sleeve (10), drive motor (11), rotating shaft (12), rotation locking device (13) and fastening screw (14), the torsion sleeve (10) is rotationally arranged in the inside horizontal direction of test piece loading frame (8), the drive motor (11) is mounted on the outside of test piece loading frame (8), and the output end of the drive motor (11) is connected with the torsion sleeve (10) by the rotating shaft (12), the rotation locking device (13) is provided in the horizontal direction of the side away from the torsion sleeve (10) in test piece loading frame (8), one end of the rotation locking device (13) is connected with test piece (20), the other end of the test piece (20) is connected with the torsion sleeve (10) by the rotating shaft (12), the drive motor (11) is electrically connected with controller (15) and digital display instrument (16) respectively, the rotation locking device (13) includes test piece fixing sleeve (21) in test piece loading frame (8), and the test piece fixing sleeve (21) is rotationally connected between the inner wall of test piece loading frame (8), fastening screw (14) is threadedly penetrated on the upper and lower ends of the test piece fixing sleeve (21), and one end of the fastening screw (14) in the test piece fixing sleeve (21) is connected with arc fastening piece (22) by bearing.

2. A torsion testing apparatus based on a photo-elastic apparatus according to claim 1, characterized in that, Fastening support (17) is arranged between front polarizing frame (6) and rear polarizing frame (7), and front polarizing frame (6), rear polarizing frame (7) and test piece loading frame (8) are fastened and connected by fastening support (17), front polarizing frame (6) and rear polarizing frame (7) are fixed on base (19) by fastening support (17), imaging device support (18) is also fixed on base (19), and imaging device (2) is fixed on imaging device support (18).

3. A torsion testing apparatus based on a photo-elastic apparatus according to claim 2, characterized in that, The utility model provides a kind of optical source (1) and imaging device (2), the optical source (1) and the imaging device (2) between being provided with photoelastic body (3), the photoelastic body (3) includes respectively mounting front polarizer (4) and rear polarizer (5) front polarizing frame (6) and rear polarizing frame (7), front polarizing frame (6) and rear polarizing frame (7) between mounting test piece loading frame (8), torsion device (9) is provided in test piece loading frame (8), the torsion device (9) is composed of torsion sleeve (10), drive motor (11), rotating shaft (12), rotation locking device (13) and fastening screw (14), the torsion sleeve (10) is rotationally arranged in the inside horizontal direction of test piece loading frame (8), the drive motor (11) is mounted on the outside of test piece loading frame (8), and the output end of the drive motor (11) is connected with the torsion sleeve (10) by the rotating shaft (12), the rotation locking device (13) is provided in the horizontal direction of the side away from the torsion sleeve (10) in test piece loading frame (8), one end of the rotation locking device (13) is connected with test piece (20), the other end of the test piece (20) is connected with the torsion sleeve (10) by the rotating shaft (12), the drive motor (11) is electrically connected with controller (15) and digital display instrument (16) respectively, the rotation locking device (13) includes test piece fixing sleeve (21) in test piece loading frame (8), and the test piece fixing sleeve (21) is rotationally connected between the inner wall of test piece loading frame (8), fastening screw (14) is threadedly penetrated on the upper and lower ends of the test piece fixing sleeve (21), and one end of the fastening screw (14) in the test piece fixing sleeve (21) is connected with arc fastening piece (22) by bearing.

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