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首页> 外文期刊>Materials Science and Engineering >Deformation behavior and damage in B_4CP/6061Al composites: An actual 3D microstructure-based modeling
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Deformation behavior and damage in B_4CP/6061Al composites: An actual 3D microstructure-based modeling

机译：B_4CP / 6061Al复合材料中的变形行为和损伤：实际的基于3D微观结构的建模

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摘要

The influence of particle size on the mechanical behavior of B_4Cp/6061Al composites prepared by powder metallurgy is investigated by combining the tensile test with finite element method (FEM) simulation. The experimental results show that increasing the particle size from 20 μm to 80 μm deteriorates the tensile property and work hardening rate of the B_4Cp/6061Al composites. The actual three-dimensional (3D) microstructure obtained by synchrotron radiation X-ray computed microtomography (SR-μCT) is incorporated into finite element models to study the deformation behavior and internal damage of the composites. The matrix ductile damage, particle brittle failure criterion, and interface traction-separation law which are associated with particle sizes are employed to predict the tensile properties. The deformation behavior and damage mechanism in the B_4Cp/6061Al composites are revealed by analyzing the stress and strain distributions. Furthermore, stress concentration factor is considered to evaluate the load-bearing capability of the composites reinforced by various particle sizes. This work provides a reference for studying the mechanical behavior of heterogeneous micro-structural materials via actual microstructure-based modeling.
机译：通过将拉伸试验与有限元模拟相结合，研究了粒径对粉末冶金制备的B_4Cp / 6061Al复合材料力学性能的影响。实验结果表明，将粒径从20μm增加到80μm会降低B_4Cp / 6061Al复合材料的拉伸性能和加工硬化率。通过同步辐射X射线计算机断层扫描（SR-μCT）获得的实际三维（3D）微观结构被纳入有限元模型，以研究复合材料的变形行为和内部损伤。与颗粒尺寸相关的基体延性损伤，颗粒脆性破坏准则和界面牵引-分离定律被用来预测拉伸性能。通过分析应力和应变分布，揭示了B_4Cp / 6061Al复合材料的变形行为和损伤机理。此外，应力集中系数被认为可评估各种粒径增强的复合材料的承载能力。这项工作为通过实际的基于微结构的建模研究异质微结构材料的力学行为提供了参考。

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