This study evaluates four fracture simulation methods, comparing their computational expenses and implementation complexities within the Finite Element (FE) framework when employed on multiphase materials. Fracture methods considered encompass the Cohesive Zone Model (CZM) using zero-thickness cohesive interface elements (CIEs), the Standard Phase-Field Fracture (SPFM) approach, the Cohesive Phase-Field fracture (CPFM) approach, and an innovative hybrid model. The hybrid approach combines the CPFM fracture method with the CZM, specifically applying the CZM within the interface zone. The finite element model studied is characterized by three specific phases: Inclusions, matrix, and interface zone. The thorough assessment of these modeling techniques indicates that the CPFM approach stands out as the most effective computational model provided that the thickness of the interface zone is not significantly smaller than that of the other phases. In materials like concrete the interface thickness is notably small when compared to other phases. This leads to the hybrid model standing as the most authentic finite element model, utilizing CIEs within the interface to simulate interface debonding. A significant finding from this investigation is that the CPFM method is in agreement with the hybrid model when the interface zone thickness is not excessively small. This implies that the CPFM fracture methodology may serve as a unified fracture approach for multiphase materials, provided the interface zone's thickness is comparable to that of the other phases. In addition, this research provides valuable insights that can advance efforts to fine-tune material microstructures. An investigation of the influence of the interface material properties, morphological features and spatial arrangement of inclusions showes a pronounced effect of these parameters on the fracture toughness of the material.

翻译：本研究评估了四种断裂模拟方法，对比了它们在有限元框架下应用于多相材料时的计算成本与实现复杂度。所考虑的断裂方法包括：采用零厚度内聚界面单元的黏聚区模型、标准相场断裂方法、黏聚相场断裂方法及一种创新的混合模型。该混合方法将CPFM断裂方法与CZM相结合，专门在界面区域应用CZM。研究的有限元模型包含三个特定相：夹杂相、基体相和界面相。对这些建模技术的全面评估表明，当界面相厚度与其他相厚度相比不显著偏小时，CPFM方法是最有效的计算模型。在混凝土等材料中，界面厚度与其他相相比明显偏小，这导致混合模型成为最真实的有限元模型——即在界面区域采用CIEs模拟界面脱粘。本研究的一个重要发现是：当界面相厚度不过小时，CPFM方法与混合模型结果一致。这意味着，只要界面相厚度与其他相厚度相当，CPFM断裂方法可作为多相材料的统一断裂方法。此外，本研究为优化材料微观结构提供了重要见解。对界面材料属性、夹杂物形态特征及空间排布影响的探究表明，这些参数对材料断裂韧性具有显著影响。