DIC technology-based automobile thin plate FLC curve determination device and method

A measuring device and thin plate technology, which is applied in the direction of testing the ductility of materials, etc., can solve the problems of strain value measurement accuracy, accuracy error, waste of manpower and material resources, and low accuracy of experimental data, so as to improve lubrication conditions and adjust daylighting Convenience and the effect of improving measurement accuracy
CN105223090AInactive Publication Date: 2016-01-06ANGANG STEEL CO LTD
6 Cites 11 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ANGANG STEEL CO LTD
Publication Date
2016-01-06
Estimated Expiration
Not applicable ยท inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a DIC technology-based automobile thin plate FLC curve determination device and method. The device comprises a material tester, a video camera, a computer and a bulging tester. The bulging tester comprises an upper base, a female die, a blank holder, a lower base and a puncher pin. The upper base is fixed to an installation platform of the material tester, the female die is connected to the lower surface of the upper base, the blank holder is installed on the upper surface of the lower base, the lower base is fixed to a lifting platform of the material tester and the puncher pin is installed on a hydraulic cylinder. The method comprises tightly clamping a test sample between the female die and the blank holder by the lifting platform, punching the test sample to produce cracks by the puncher pin under the action of the hydraulic cylinder, shooting a test sample mesh deformation process by the video camera, computing a limiting strain value by the computer through DIC software, changing the test sample until all limiting strain values of all the samples are obtained, and drawing a FLC curve of an automobile thin plate by connection of all the limiting strain value points. The device and method are convenient for operation, save time and labor, greatly improve a measurement precision and are convenient for observation and research of necking phenomenon.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of automobile plate formability inspection, and in particular relates to a DIC technology-based FLC curve measuring device and a measuring method for an automobile thin plate. Background technique

[0002] FLC curve (Forming Limited Curve, forming limit curve) is the most intuitive and effective method to evaluate the formability of sheet metal, and it is widely used in stamping forming of automobile sheet. Theoretical research on FLC curve is of great significance for revealing the cause of actual effect, law of actual effect and accurate solution to engineering problems in the process of sheet metal forming.

[0003] The experimental, theoretical and numerical analysis of the FLC curve has been a hot topic of research by many scholars at home and abroad. After extensive methodological studies, the way of obtaining FLC curves by the bulging test method was accepted. During the bulging experiment, in order to obtain...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More