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3D finite element modeling of yarn reinforced mineral matrix: Comparison of damage behavior with experimental data

机译：纱线增强矿物矩阵的3D有限元模型：实验数据损伤行为的比较

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摘要

Mineral-based composites are presented as a real alternative to the use of Fiber Reinforced Polymer (FRP) composites. However, most studies have focused only on the global mechanical behavior of the mineral-based composites. The objective of this paper is to develop a 3D numerical model in order to predict global and local tensile behavior of glass yarn/ettringitic matrix composites. Two configurations have been studied including dry and pre-impregnated yarn. This modeling is based on a microscopic approach that considers the composite as a heterogeneous material, and that requires defining the properties of the matrix, the yarn and the interface. To simulate the cracked behavior of the matrix and yarnmatrix bond, a discrete model of cohesive zones was adopted. For both dry and pre-impregnated composites, comparisons of numerical and experimental results showed a good agreement in terms of global tensile behavior, cracking and failure mode. This model allowed to analyze the stress and strain states in the yarn, matrix and interface and therefore to deepen the knowledge of the tensile behavior of this type of composite and understand the mechanisms that act during the evolution of the test.
机译：矿物基复合材料作为使用纤维增强聚合物（FRP）复合材料的真正替代品。然而，大多数研究仅集中在矿物基复合材料的全球力学行为上。本文的目的是开发3D数值模型，以预测玻璃纱/ Ettringitic基质复合材料的全局和局部拉伸行为。已经研究了两种配置，包括干燥和预浸的纱线。该建模基于微观方法，将复合材料作为异质材料，并且需要定义矩阵，纱线和界面的性质。为了模拟矩阵和yarnmatrix键的裂纹行为，采用了一种分立的粘性区域模型。对于干燥和预浸渍的复合材料，数值和实验结果的比较在全球拉伸行为，开裂和失效模式方面表现出良好的一致性。该模型允许分析纱线，矩阵和界面中的应力和应变状态，从而加深了这种复合材料的拉伸行为的知识，并了解在测试过程中采用的机制。

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