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Method and device for obtaining and verifying constitutive parameters and dynamic failure parameters

A failure parameter and constitutive technology, applied in measuring devices, using stable tension/pressure testing material strength, instruments, etc., can solve the problems affecting the energy absorption performance of aluminum alloy materials, lack of constitutive models and dynamic failure parameters, influence High-speed rail locomotive structure design and other issues

Inactive Publication Date: 2019-01-18
INST OF MECHANICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

[0004] However, in the existing scheme, there is a lack of research on its constitutive model and dynamic failure parameters, which in turn affects the research on the energy absorption performance of aluminum alloy materials and affects the structural design of the high-speed rail head

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  • Method and device for obtaining and verifying constitutive parameters and dynamic failure parameters
  • Method and device for obtaining and verifying constitutive parameters and dynamic failure parameters
  • Method and device for obtaining and verifying constitutive parameters and dynamic failure parameters

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] In order to facilitate the understanding of the embodiments of the present invention, further explanations will be given below with specific embodiments in conjunction with the accompanying drawings, which are not intended to limit the embodiments of the present invention.

[0050] figure 1 A schematic flowchart of a method for obtainin...

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Abstract

The embodiment of the invention relates to a method and device for obtaining and verifying constitutive parameters and dynamic failure parameters. The method comprises the steps of: performing a quasi-static tensile experiment of an aluminium alloy material, and obtaining the quasi-static stress-strain curve of the aluminium alloy material; obtaining the dynamic stress-strain curve of the aluminium alloy material in different strain rates; obtaining the constitutive parameters of the aluminium alloy material by fitting according to the quasi-static stress-strain curve and the dynamic stress-strain curve; analyzing the fracture generated when the aluminium alloy material is tested, and determining the dynamic failure parameters of the aluminium alloy material; and, performing simulation calculation according to the constitutive parameters and the dynamic failure parameters, verifying the accuracy of the constitutive parameters and failure strain of the aluminium alloy material, simulating quasi-static stress-strain and dynamic stress-strain of the aluminium alloy material, then, obtaining the constitutive parameters and the dynamic failure parameters of the aluminium alloy material,and finally, verifying the constitutive parameters and the dynamic failure parameters.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of trains, in particular to a method and device for acquiring and verifying constitutive parameters and dynamic failure parameters. Background technique [0002] High-speed trains have played a huge role in promoting my country's economic development. For vehicles such as high-speed trains, impact phenomenon has always been an extremely important and unavoidable problem. In recent years, with the rapid increase in the number of high-speed trains and the continuous increase in driving speed, the collision problem has become more and more prominent, and the rapidly increasing collision accidents will cause heavy casualties and property losses. primary consideration. In the relevant research on high-speed trains, the deformation energy absorption and impact protection of the high-speed train head under impact and collision loads are an important topic. [0003] Among them, the more ...

Claims

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Application Information

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IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0017G01N2203/0075
Inventor 魏延鹏刘子尚杨喆郭雅悰黄晨光
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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