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Specimen assembly and test method for testing mode III dynamic fracture toughness of brittle materials

A brittle material, fracture toughness technology, applied in the direction of analyzing materials, measuring devices, strength characteristics, etc., can solve the problems of no feasible type III dynamic fracture toughness test method, difficult production, poor practicability, etc., to reduce the number of test pieces. The effect of damage, low processing difficulty and reasonable position setting

Inactive Publication Date: 2018-11-23
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Aiming at the complex structure of the existing Type III dynamic fracture toughness test specimens, high manufacturing difficulty, poor practicability in the Type III dynamic fracture toughness test, and the technical status quo that there is no feasible Type III dynamic fracture toughness test method, the present invention The aim is to provide specimen components and test methods for testing the Type III dynamic fracture toughness of brittle materials, to simplify the structure of the specimens for testing the Type III dynamic fracture toughness of brittle materials, and to fill the gap in the prior art for Type III dynamic fracture toughness of brittle materials. Gaps in Degree Testing Fields

Method used

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  • Specimen assembly and test method for testing mode III dynamic fracture toughness of brittle materials
  • Specimen assembly and test method for testing mode III dynamic fracture toughness of brittle materials
  • Specimen assembly and test method for testing mode III dynamic fracture toughness of brittle materials

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Embodiment 1

[0042] In the present embodiment, the structural representation of the specimen assembly used for the Type III dynamic fracture toughness test of brittle materials is as follows Figure 1~3 As shown, the specimen body of the specimen assembly is made by cutting a concrete block with a diamond slicer.

[0043] The test piece assembly for the Type III dynamic fracture toughness test of brittle materials consists of a test piece body 1 with a notch 2 and an indenter 3 against the test piece body. The test piece body is a square plane plate, and the test piece The side length of the body is L=70mm, the thickness of the test piece body is B=10mm, the slot 2 on the body of the test piece is four slots with the same shape, which are respectively located at the positions of the two symmetry lines on the four sides of the body of the test piece , the direction of the groove is along the thickness direction of the specimen body and the direction of the symmetry line, the opening of the ...

Embodiment 2

[0045] In the present embodiment, the structural representation of the specimen assembly used for the Type III dynamic fracture toughness test of brittle materials is as follows Figure 1~3 As shown, the specimen body of the specimen assembly is made by cutting a concrete block with a diamond slicer.

[0046] The test piece assembly for the Type III dynamic fracture toughness test of brittle materials consists of a test piece body 1 with a notch 2 and an indenter 3 against the test piece body. The test piece body is a square plane plate, and the test piece The side length of the body is L=100mm, the thickness of the test piece body is B=20mm, and the cut grooves 2 located on the test piece body are four cut grooves with the same shape, which are respectively located at the positions of the two symmetry lines on the four sides of the test piece body , the direction of the groove is along the thickness direction of the specimen body and the direction of the symmetry line, the op...

Embodiment 3

[0048] In the present embodiment, the structural representation of the specimen assembly used for the Type III dynamic fracture toughness test of brittle materials is as follows Figure 1~3 As shown, the specimen body of the specimen assembly is made by cutting a rock block with a diamond slicer.

[0049] The test piece assembly for the Type III dynamic fracture toughness test of brittle materials consists of a test piece body 1 with a notch 2 and an indenter 3 against the test piece body. The test piece body is a square plane plate, and the test piece The side length of the body is L=50mm, the thickness of the test piece body is B=5mm, and the cut grooves 2 on the test piece body are four cut grooves with the same shape, which are respectively located at the positions of the two symmetry lines on the four sides of the test piece body , the direction of the groove is along the thickness direction of the specimen body and the direction of the symmetry line, the opening of the g...

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Abstract

The invention discloses a test piece component for an III-type dynamic fracture toughness test of a fragile material and a test method. The test piece component comprises a test piece body with grooves and pressing heads propping against the test piece body, wherein the test piece body is a square planer block; the four grooves in same shape are formed in the test piece body; the grooves are respectively located at the positions of two symmetric lines of the test piece body planes on four side walls of the test piece body; the directions of the grooves are along the thickness direction and symmetric line direction of the test piece body; groove openings are extended into the test piece body and penetrated through the upper and lower planes of the test piece body; four pressing heads are in same shape and are in point contact with the test piece body plane; two pressing heads are symmetrically located on a same diagonal line of one lateral plate of the test piece body; the other two pressing heads are symmetrically located on another diagonal line of another lateral plate of the test piece body. According to the test method, the test piece component and a hopkinson pressure bar are used together for testing.

Description

technical field [0001] The invention belongs to the field of material mechanical performance testing, in particular to a test piece component and a testing method for testing the Type III dynamic fracture toughness of brittle materials. Background technique [0002] Civil, water conservancy, machinery, transportation, petroleum, mining, aerospace and other engineering fields all involve the fracture of brittle materials such as concrete, rock, ceramics or graphite. Fracture toughness, as a mechanical parameter that characterizes the resistance of materials to fracture in fracture mechanics, is of great value in both engineering applications and theoretical research. According to the different loading modes of the crack body, the fracture can be divided into three basic modes of type I, type II and type III, and correspondingly, the fracture toughness is also divided into type I, type II and type III fracture toughness, namely K Ic , K IIc and K IIIc . Type I fracture re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/02G01N3/307
CPCG01N3/02G01N3/307G01N2203/027
Inventor 戴峰魏明东徐奴文刘燚许媛赵涛
Owner SICHUAN UNIV
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