Gad Shaimaa I, Attia Mohamed A, Hassan Mohamed A, El-Shafei Ahmed G
Department of Mechanical Design and Production Engineering, Faculty of Engineering, Zagazig University, Zagazig P.O. Box 44519, Egypt.
Materials (Basel). 2021 Apr 23;14(9):2143. doi: 10.3390/ma14092143.
In this paper, an integrated numerical model is proposed to investigate the effects of particulate size and volume fraction on the deformation, damage, and failure behaviors of particulate-reinforced metal matrix composites (PRMMCs). In the framework of a random microstructure-based finite element modelling, the plastic deformation and ductile cracking of the matrix are, respectively, modelled using Johnson-Cook constitutive relation and Johnson-Cook ductile fracture model. The matrix-particle interface decohesion is simulated by employing the surface-based-cohesive zone method, while the particulate fracture is manipulated by the elastic-brittle cracking model, in which the damage evolution criterion depends on the fracture energy cracking criterion. A 2D nonlinear finite element model was developed using ABAQUS/Explicit commercial program for modelling and analyzing damage mechanisms of silicon carbide reinforced aluminum matrix composites. The predicted results have shown a good agreement with the experimental data in the forms of true stress-strain curves and failure shape. Unlike the existing models, the influence of the volume fraction and size of SiC particles on the deformation, damage mechanism, failure consequences, and stress-strain curve of A359/SiC particulate composites is investigated accounting for the different possible modes of failure simultaneously.
本文提出了一个综合数值模型，以研究颗粒尺寸和体积分数对颗粒增强金属基复合材料（PRMMCs）的变形、损伤及失效行为的影响。在基于随机微观结构的有限元建模框架下，分别采用Johnson-Cook本构关系和Johnson-Cook韧性断裂模型对基体的塑性变形和韧性开裂进行建模。采用基于表面的粘结区方法模拟基体-颗粒界面脱粘，而颗粒断裂则通过弹性脆性开裂模型来处理，其中损伤演化准则取决于断裂能开裂准则。利用ABAQUS/Explicit商业软件建立了二维非线性有限元模型，用于模拟和分析碳化硅增强铝基复合材料的损伤机制。预测结果在真应力-应变曲线和失效形状等方面与实验数据显示出良好的一致性。与现有模型不同的是，本文同时考虑了不同可能的失效模式，研究了SiC颗粒的体积分数和尺寸对A359/SiC颗粒复合材料的变形、损伤机制、失效后果及应力-应变曲线的影响。
