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A test device for realizing multiple composite crack propagation and using method

A crack propagation and test device technology, which is applied in the field of test devices to realize multiple compound crack growth, and can solve problems such as experimental measurement errors

Active Publication Date: 2022-07-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, different samples have different geometric structures, and at the same time, the corresponding loading devices produce different boundary conditions, which will inevitably lead to errors in experimental measurement

Method used

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  • A test device for realizing multiple composite crack propagation and using method
  • A test device for realizing multiple composite crack propagation and using method
  • A test device for realizing multiple composite crack propagation and using method

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Embodiment Construction

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the corresponding drawings. The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] According to the embodiments of the present invention, a test device and method for realizing multiple composite crack propagation are provided, which are used for testing composite crack propagation behavior of materials. The composite crack growth experiment uses the same size sample, figure 1 (a) is the sample used for type I / II loading, which is subjected to tension and plane shear during the experiment; figure 1 (b) is the sample used for type I / III loading, which is subjected to tensile and inverse plane shea...

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Abstract

The invention belongs to the technical field of material mechanics test and testing, and in particular relates to a test device and a use method for realizing the propagation of multiple composite cracks. The device includes four fan-shaped arc plates, two U-shaped hooks, two spacers with holes for adjusting the position of the sample, and several composite crack propagation samples. The fan-shaped arc plate has three groups of through holes H 1,i , H 2,i and H 3,i , i=1,...,N, N is the number of through holes in each group; the center of each group of through holes is placed on the same radius of the fan-shaped arc plate and arranged at equal radian intervals, and the most Two through holes H at both ends j,1 and H j,N , j=1, 2, 3 are in a 90-degree radian relationship with respect to the center of the fan-shaped arc plate. The invention can realize the standardized I-type, II-type, III-type and I / II-type, I / III-type and II / III-type compound crack propagation experiments with different compound ratios, and the experimental results have certain contrast, which can be used for research The effect of different load compound ratios on the growth behavior of compound cracks provides an experimental basis.

Description

technical field [0001] The invention belongs to the technical field of material mechanics test and testing, and in particular relates to a test device and a use method for realizing the propagation of multiple composite cracks. Background technique [0002] In actual engineering structures, the cracks are mostly in the state of compound deformation. For example, in the stiffened plates and shells in aerospace and ship structures, their cracks are often I / II compound cracks with the coexistence of open and sliding types. The cracks of rotating components, such as generator shafts, are often I / III composite cracks formed by opening and torsion. There are also ball bearings, railway wheels and gears that mainly suffer from type II / III composite cracks. [0003] Due to the complexity of the composite fracture problem, composite fracture experiments have so far not been standardized. The AFM (all fracture modes) specimen and its specific fixture designed by Richard and Kuna in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/24
CPCG01N3/08G01N3/24G01N2203/0026G01N2203/0066G01N2203/0423
Inventor 张修硕马玉娥马良赵阳
Owner NORTHWESTERN POLYTECHNICAL UNIV
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