Dynamic Stress Intensity Factors of the Half Infinite Crack in the Orthotropic Material Strip with a Large Anisotropic Ratio

- Journal title : Transactions of the Korean Society of Mechanical Engineers A
- Volume 24, Issue 6, 2000, pp.1557-1564
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.22634/KSME-A.2000.24.6.1557

Title & Authors

Dynamic Stress Intensity Factors of the Half Infinite Crack in the Orthotropic Material Strip with a Large Anisotropic Ratio

Baek, Un-Cheol; Hwang, Jae-Seok;

Baek, Un-Cheol; Hwang, Jae-Seok;

Abstract

When the half infinite crack in the orthotropic material strip with a large anisotropic ratio(E11>>E22) propagates with constant velocity, dynamic stress component y occurre d along the axis is derived by using the Fourier transformation and Wiener-Hopf technique, and the dynamic stress intensity factor is derived. The dynamic stress intensity factor depends on a crack velocity, mechanical properties and specimen hight. The normalized dynamic stress intensity factors approach the maximum values when normalized time(=Cs/a) is about 2. They have the constant values when the normalized time is greater than or equal to about 2, and decrease with increasing a/h(h: specimen hight, a: crack length) and the normalized crack propagation velocity( = c/Cs, Cs: shear wave velocity, c: crack propagation velocity).

Keywords

Orthotropic Material;Strip;Shear Wave Velocity;Fourier Transformation;Wiener-Hopf Technique;Dynamic Stress Intensity Factor;Normal Impact Load;Crack Surface;Anisotropic Ratio;Half Infinite Crack;

Language

Korean

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