Damage model parameter calibration method based on tensile shear and notch tension tests

A technique of tensile shearing and tensile testing, which is used in the application of stable shearing force to test the strength of materials, electrical digital data processing, special data processing applications, etc. It can solve the problem of large image processing errors and uneven sections problems, to achieve the effect of improving the accuracy of parameter calibration and saving workload

Inactive Publication Date: 2018-02-02
CRRC QINGDAO SIFANG CO LTD
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Problems solved by technology

Due to the uneven cross section, the image processing error is very large

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  • Damage model parameter calibration method based on tensile shear and notch tension tests
  • Damage model parameter calibration method based on tensile shear and notch tension tests
  • Damage model parameter calibration method based on tensile shear and notch tension tests

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[0035] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore sh...

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Abstract

The invention relates to the field of damage model parameter calibration and discloses a damage model parameter calibration method based on tensile shear and notch tension tests. The method includes:using a special-shaped tensile shear sample to convert uniaxial tensile load into pure shear load, and acquiring the shear stress-strain curve of a material under low stress triaxiality; using the notch tension test to convert uniaxial tension into triaxial tension, and acquiring the triaxial tension stress-strain curve of the material under high stress triaxiality; using full-size finite elementsimulation to acquire the precise stress-strain curve of the material in a wide stress triaxiality range and the evolutionary relationship of the fracture strain along with the stress triaxiality to provide a test foundation for damage model parameter calibration. By the method, workload can be reduced, and parameter calibration precision can be increased greatly.

Description

technical field [0001] The invention relates to the technical field of damage model parameter calibration, in particular to a damage model parameter calibration method based on tensile shear and notch tensile tests. Background technique [0002] Damage model is the cornerstone of many engineering numerical simulations. It is widely used in material processing, automobile crashworthiness test, high-speed rail safety test, bird strike aircraft simulation and other fields, and can provide valuable technical parameters for material and structure optimization design. and reference information. However, the predictive ability and reliability of numerical simulation largely depend on the accuracy of model parameters, so careful experimental calibration of material damage model parameters is necessary. [0003] According to textbooks or references, the traditional methods of damage model parameter calibration mostly rely on uniaxial compression test and torsion test. Most metal ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G06F17/50
CPCG01N3/24G01N2203/0025G01N2203/0067G06F30/23
Inventor 李晓东孟立春孙晓红孙晓光崔健王海波
Owner CRRC QINGDAO SIFANG CO LTD
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