Measurement of the steady state tearing in thin sheets using the contactless system

Ľ. Ambriško, L. Pešek
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引用次数: 2

Abstract

The purpose of the present paper is the diagnostic method of the steady state tearing tests in thin steel sheets. The camera-based contactless system was used in the experimental research. The MATLAB software was used for the processing of real-time images. The data collected in the experiments were used to establish the R-curves in terms of the CTOD (crack tip opening displacement) based resistance curves. The innovative techniques allow extracting a large amount of geometrical information about the entire tearing process and the crack tip development. The steady state tearing was evaluated using automotive steel sheets and the tearing resistance was determined for three grades of thin sheets. The paper describes a comprehensive method of obtaining the material properties necessary for modelling and simulation. The proposed methodology for the testing and evaluation of the steady state tearing is applicable to thin sheets. The measurement method within the test for the determination of the tearing resistance was based on the image analysis.
用非接触式系统测量薄板的稳态撕裂
本文的目的是研究薄钢板稳态撕裂试验的诊断方法。实验研究采用了基于摄像机的非接触式系统。利用MATLAB软件对实时图像进行处理。利用实验数据建立基于裂纹尖端张开位移的阻力曲线r曲线。创新的技术允许提取有关整个撕裂过程和裂纹尖端发展的大量几何信息。以汽车钢板为研究对象,对其稳态撕裂性能进行了评价,并对3种等级的薄板进行了抗撕裂性能测定。本文描述了一种获得建模和仿真所需的材料性能的综合方法。所提出的测试和评价稳态撕裂的方法适用于薄板。试验中测定抗撕裂性的测量方法是基于图像分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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