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Numerical analysis of geometrically induced hardening in planar architectured materials

机译：平面架构材料几何诱导硬化的数值分析

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摘要

The presented study focuses on the evaluation of mechanical performance of architectured materials with planar geometry. The main objective is to investigate the effect of geometrically induced hardening of different geometrical patterns during uniaxial loading. The analysis is performed by FEM on a basic cell that represents a particular geometry. Seven different geometries, each with three volume fractions of the reinforcement (0.1, 0.4 and 0.8) are analyzed for four combinations of perfect plastic materials. The matrix material is kept identical, while 4 variants of the reinforcement material are taken into account. The results show that geometry can induce hardening that expands the region of a stable material deformation beyond the capabilities of its constituent materials. An improvement in the strain energy density due to the hardening can be achieved either by a higher strength attained by using the reinforcement aligned to the loading direction, or by a higher strain attained by using the reinforcement arranged like cantilever beam that is inclined or perpendicular to the loading. The best performance regarding strain energy density among the different volume fractions and materials combinations is achieved for the geometry with a combination of both types of reinforcement.
机译：本研究侧重于使用平面几何结构的建筑材料的机械性能评估。主要目的是研究单轴载荷过程中几何诱导的不同几何图案的硬化的影响。通过有限元在代表特定几何形状的基本单元上进行分析。七种不同的几何形状，每个具有三个体积分数的加固（0.1,0.4和0.8）分析为完美塑料材料的四种组合。基质材料保持相同，而引入材料的4个变型被考虑在内。结果表明，几何形状可以诱导硬化，该硬化扩展到超出其构成材料的能力之外的稳定材料变形的区域。通过使用硬化引起的应变能密度的改善可以通过使用与装载方向对准的增强件实现的更高的强度来实现，或者通过使用倾斜或垂直于悬臂梁的加强件实现的较高的菌株来实现装载。对于具有两种类型的加强件的几何形状，实现了关于不同体积分数和材料组合之间的应变能密度的最佳性能。

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  • 来源
    《Composite Structures》 |2020年第2期|111633.1-111633.10|共10页
  • 作者

    Siska Filip; Cizek Jan; Seiner Hanus; Dlouhy Ivo;

  • 作者单位

    Czech Acad Sci Inst Phys Mat Brno Czech Republic;

    Brno Univ Technol Inst Mat Sci & Engn Brno Czech Republic|Czech Acad Sci Inst Plasma Phys Prague Czech Republic;

    Czech Acad Sci Inst Thermomech Prague Czech Republic;

    Czech Acad Sci Inst Phys Mat Brno Czech Republic;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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