Effects of the inclusion shape, arrangement, and volume fraction on effective elastic moduli of two-dimensional two-phase composites

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2024-11-06 DOI:10.1016/j.compscitech.2024.110953

Xuqian Liu , Hui Li , Shaobo Sun

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Abstract

The spatial arrangement and shape of inclusions can have a major impact on two-phase composites' mechanical properties. Few studies consider the coupling effects of these two factors on the effective elastic moduli of two-phase composites. This study introduces the circularity of inclusions to modify the three-point approximation (TPA) for quantitatively predicting the coupling effects of inclusion planar arrangement and shape. Two-dimensional particle packing structures of monosized particles are generated with polygons, superellipses, and superovals of different circularities and volume fractions via the ordered arrangement approach or the discrete element method. Then, the lattice model is conducted on the particle packing structures to verify the reliability of the modified TPA. The comparison between the theoretical calculation and the numerical simulation indicates that our modified TPA can predict the effects of planar arrangement, shape, and volume fraction of inclusions on the effective moduli. The proposed modified TPA offers fresh perspectives on comprehending intricate relationships between the macro-property and composition of composites.

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包合物形状、排列和体积分数对二维两相复合材料有效弹性模量的影响

夹杂物的空间排列和形状会对两相复合材料的机械性能产生重大影响。很少有研究考虑这两个因素对两相复合材料有效弹性模量的耦合效应。本研究引入了夹杂物的圆度来修正三点近似（TPA），以定量预测夹杂物平面布置和形状的耦合效应。通过有序排列法或离散元法，用不同圆度和体积分数的多边形、超椭球形和超椭球形生成单尺寸颗粒的二维颗粒堆积结构。然后，对颗粒堆积结构进行晶格模型计算，以验证修正 TPA 的可靠性。理论计算与数值模拟的比较表明，我们的改进型 TPA 可以预测夹杂物的平面布置、形状和体积分数对有效模量的影响。所提出的改进型 TPA 为理解复合材料宏观性能与成分之间的复杂关系提供了新的视角。

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.