An improved interfacial bonding model was proposed from potential function point of view to investigate interfacial interactions in polycrystalline materials. It characterizes both attractive and repulsive interfacial interactions and can be applied to model different material interfaces. The path dependence of work-of-separation study indicates that the transformation of separation work is smooth in normal and tangential direction and the proposed model guarantees the consistency of the cohesive constitutive model. The improved interfacial bonding model was verified through a simple compression test in a standard hexagonal structure. The error between analytical solutions and numerical results from the proposed model is reasonable in linear elastic region. Ultimately, we investigated the mechanical behavior of extrafibrillar matrix in bone and the simulation results agreed well with experimental observations of bone fracture.

中文翻译：

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一种用于材料界面建模的改进界面键合模型

从潜在函数的角度提出了一种改进的界面键合模型，以研究多晶材料中的界面相互作用。它表征了吸引和排斥的界面相互作用，可用于模拟不同的材料界面。分离功研究的路径依赖表明分离功在法向和切线方向的转换是平滑的，所提出的模型保证了内聚本构模型的一致性。通过标准六边形结构中的简单压缩测试验证了改进的界面结合模型。所提出模型的解析解与数值结果之间的误差在线弹性区域是合理的。最终，