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首页> 外文期刊>Composites: mechanics, computations, applications >THE INFLUENCE OF LUEDERS FRONT PROPAGATION ON THE STRENGTH OF THE 'COATING-SUBSTRATE' COMPOSITE. NUMERICAL SIMULATION
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THE INFLUENCE OF LUEDERS FRONT PROPAGATION ON THE STRENGTH OF THE 'COATING-SUBSTRATE' COMPOSITE. NUMERICAL SIMULATION

机译：Lueders前部传播对“涂料基体”复合材料强度的影响。数值模拟

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摘要

Processes of propagation of localized plastic deformation fronts in a material with boride coating have been investigated. The boundary-value dynamic problem is solved in the plane-strain formulation. Numerical simulation is performed by the finite-difference method. In calculations the mi-crostructure of the composite is taken into account explicitly and corresponds to that observed experimentally. The constitutive equations for the steel substrate include an elastoplastic model with isotropic strain hardening taking into account a relation to describe slow flows. Deformation and fracture of the coated material under external compression is shown to be controlled by the appearance of local regions of tension along the interface. An interaction and interplay between nonhomogeneous plastic deformation in the steel substrate and crack origination and growth in the coating are studied. Cracking patterns, location of the fracture onset, and volume fraction of failed material are found to depend on the velocity of Lueiiders front propagation.
机译：已经研究了具有硼化物涂层的材料中局部塑性变形前沿的传播过程。在平面应变公式中解决了边值动态问题。通过有限差分法进行数值模拟。在计算中，复合材料的微观结构被明确考虑，并且与实验观察到的相对应。钢基底的本构方程包括具有各向同性应变硬化的弹塑性模型，并考虑了描述缓慢流动的关系。涂层材料在外部压缩下的变形和断裂显示为受沿界面局部张力区域的控制。研究了钢基底中非均匀塑性变形与涂层中裂纹产生与扩展之间的相互作用和相互作用。发现破裂模式，断裂起点的位置以及失效材料的体积分数取决于Lueiiders前端传播的速度。

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  • 作者

    R. R. Balokhonov; V. A. Romanova; S. Schmauder; E. A. Schwab; S. A. Martynov;

  • 作者单位

    Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russian Federation;

    Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russian Federation;

    Institut fuer Materialpruefung, Werkstojfkunde und Festigkeitslehre, University of Stuttgart, Germany;

    Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russian Federation;

    Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russian Federation;

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  • 正文语种 eng
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  • 关键词

    numerical simulation; coated; materials; lueders bands;

    机译：数值模拟涂层材料;路德乐队;

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