Direct shear test device using triaxial compression tester for loading and direct shear test method
A technology of triaxial compression and test device, which is applied in the direction of applying stable shear force to test the strength of materials, can solve the problems of strict sample processing and operation requirements, increase the test cost, etc., to save the test cost, the method is reliable, the Install simple effects
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[0027] Example 1:
[0028] See figure 1 , A direct shear test device loaded by a triaxial compression tester, including a shear ring 1, a shear table 3 and a heat shrink tube 5.
[0029] The upper surface of the shear ring 1 is flat, with a central hole 10 in the center. The central hole 10 is a blind hole. The lower surface of the shear ring 1 is in contact with the indenter I6 of the testing machine.
[0030] The cutting table 3 is located above the cutting ring 1. The shearing table 3 is a variable-diameter cylinder, from top to bottom: the upper cylinder 9 of the shearing table, the body cylinder 30 of the shearing table, and the upper cylinder 9 of the shearing table. The shearing table is a rigid variable-diameter cylinder, the middle large cylinder has a diameter of L, and both sides have a small cylinder with a diameter of d. The upper cylinder is in contact with the indenter of the testing machine and bears pressure. Empty the wrapping space for the shrink film. The low...
Example Embodiment
[0035] Example 2
[0036] This embodiment uses the device described in embodiment 1 to disclose an indoor direct shear test method, which includes the following steps:
[0037] 1) Process sample 2 with height h and diameter D. The diameter of sample 2 is the same as the outer diameter of shear ring 1 and limit ring 3.
[0038] 2) After the sample processing is completed, assemble the shear ring 1, the sample 2, the shear table 3 and the limit ring 4, put the heat shrinkable tube 5 inside the assembly body, and use a hot air blower to heat the heat shrinkable tube to make it tightly close Attached to the surface of the device.
[0039] 3) Place the entire device (shearing ring, shearing table, limit ring, heat shrinkable tube, etc.), and the sample on the platform of the triaxial testing machine, apply the confining pressure to the set value σ, and the sample is in static water horizontally State of stress.
[0040] 4) After the confining pressure reaches the set value σ, apply the ver...
Example Embodiment
[0043] Example 3
[0044] The main steps of this embodiment are the same as those of embodiment 2. In the test, firstly, the cylindrical plate-shaped marble sample 2 is processed, the sample diameter D is 200 mm, and the thickness h is 40 mm. Install shear ring 1, sample 2 and limit ring 4 in order. The inner diameter of shear ring 1 is 42mm, the outer diameter of shear ring 1 and limit ring 4 are both 200mm, and the inner diameter of limit ring 4 The cutting table 3 is aligned and installed in the limit ring 4, the diameter of the cylinder 30 of the cutting table body is 180 mm, and the diameter of the lower cylinder 8 is 40 mm. Put the heat shrink tube 5 on the outside of the device, use a hot air blower to heat the heat shrink tube 5 on the surface of the device; place the device on the lower head of the triaxial testing machine, set the parameters of the testing machine, and apply the confining pressure to 5MPa; apply From vertical load to sample failure, the peak load is 75...
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