具有两个边缘裂纹的板的弹塑性断裂

IF 0.5 4区工程技术 Q4 MECHANICS

Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI:10.1134/S0021894423030185

N. S. Astapov, V. D. Kurguzov

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引用次数: 0

摘要

采用Neuber-Novozhilov方法和带有非零断裂前区的改进Leonov-Panasyuk-Dugdale模型，研究了具有两个I型边缘裂纹的矩形板的强度。由于裂纹尖端附近应力场具有奇异性，采用了离散-积分耦合断裂准则。在真实裂纹尖端满足极限应变断裂准则，在模型裂纹尖端满足法向应力准则。分析了解析模型的本构方程。推导了准脆性和准韧性断裂断裂载荷的简单公式。在平面受力状态下绘制了板的断裂曲线。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

ELASTOPLASTIC FRACTURE OF A PLATE WITH TWO EDGE CRACKS

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ELASTOPLASTIC FRACTURE OF A PLATE WITH TWO EDGE CRACKS

The strength of a rectangular plate with two opening-mode (mode I) edge cracks was studied using the Neuber–Novozhilov approach and a modified Leonov–Panasyuk–Dugdale model with a nonzero prefracture zone. A coupled discrete-integral fracture criterion is used since the stress field in the vicinity of the crack tip has a singularity. The ultimate strain fracture criterion is satisfied at the real crack tip, and the normal stress criterion is satisfied at the model crack tip. The constitutive equations of the analytical model are analyzed. Simple formulas for the fracture load are derived for quasi-brittle and quasi-ductile fracture. Plate fracture curves are plotted for a plane stressed state.

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来源期刊

Journal of Applied Mechanics and Technical Physics 物理-力学

CiteScore

1.20

自引率

16.70%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Applied Mechanics and Technical Physics is a journal published in collaboration with the Siberian Branch of the Russian Academy of Sciences. The Journal presents papers on fluid mechanics and applied physics. Each issue contains valuable contributions on hypersonic flows; boundary layer theory; turbulence and hydrodynamic stability; free boundary flows; plasma physics; shock waves; explosives and detonation processes; combustion theory; multiphase flows; heat and mass transfer; composite materials and thermal properties of new materials, plasticity, creep, and failure.