Calculation method, experimental method and experimental device of V-shaped cutting groove tip stress intensity factor under pure shear loading

A technology of stress intensity factor and calculation method, applied in the direction of applying stable shear force to test material strength, measuring device, strength characteristics, etc., can solve the problems of lack of research in theory and application

Inactive Publication Date: 2020-04-17
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

However, for the V-shaped notch under pure shear loading, there is still a lack of research on t...

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  • Calculation method, experimental method and experimental device of V-shaped cutting groove tip stress intensity factor under pure shear loading
  • Calculation method, experimental method and experimental device of V-shaped cutting groove tip stress intensity factor under pure shear loading
  • Calculation method, experimental method and experimental device of V-shaped cutting groove tip stress intensity factor under pure shear loading

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Embodiment Construction

[0086] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0087] In describing the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", " "Outside" and other indication orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device, component or structure must have a specific orientation, Construction or ...

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Abstract

The invention provides a calculation method, an experiment method and an experiment device for a V-shaped cutting groove tip stress intensity factor under pure shear loading, and the calculation method is based on a caustic method and comprises the steps: 1, selecting a plane to-be-measured object with a V-shaped cutting groove, and building an optical mapping relation between the plane of the to-be-measured object and a reference plane; 2, establishing a V-shaped cutting groove tip stress field expression; 3, establishing a relational expression between the initial curve radius r0 of a caustic and a stress intensity factor KII; 4, determining a caustic mapping equation of the V-shaped cutting groove under pure shearing loading; 5, establishing a relational expression between the characteristic length Dmax and the initial curve radius r0 of the caustic; and 6, determining the V-shaped cutting groove tip stress intensity factor KII under pure shear loading. The calculation method of theV-shaped cutting groove tip stress intensity factor KII under pure shear loading is obtained through research, and a new way is provided for obtaining the V-shaped cutting groove tip stress intensityfactor. The method has good precision and numerical stability.

Description

technical field [0001] The invention belongs to the field of fracture mechanics, in particular to the calculation of the stress intensity factor of a member containing a V-shaped notch, and relates to a calculation method, an experimental method and an experimental device for the stress intensity factor of a V-shaped notch tip under pure shear loading. Background technique [0002] In various engineering structures, whether it is a large civil building or a microelectronic structure, V-shaped notches are widely present. The existence of V-shaped notches can lead to problems of stress concentration and even stress singularity, thereby reducing the load-bearing capacity of structural members. Therefore, it is crucial to study the stress distribution around the tip of the V-groove. V-shaped notch belongs to a class of problems in fracture mechanics. The key to study the stress distribution at the tip of V-shaped notch is to determine the corresponding stress intensity factor a...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N3/06
CPCG01N3/068G01N3/24G01N2203/0218G01N2203/027G01N2203/0641G01N2203/0676
Inventor 杨立云胡桓宁宋烨
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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