An improved interfacial bonding model for material interface modeling

Area of Science:

• Materials Science
• Solid Mechanics
• Computational Materials Science

Background:

• Understanding interfacial interactions is crucial for designing polycrystalline materials.
• Existing models may not fully capture the complexities of attractive and repulsive forces at interfaces.
• Accurate modeling of material interfaces impacts performance in various engineering applications.

Purpose of the Study:

• To develop an improved interfacial bonding model based on potential functions.
• To characterize both attractive and repulsive interactions at material interfaces.
• To validate the model's consistency and accuracy in predicting material behavior.

Main Methods:

• Development of a potential function-based interfacial bonding model.
• Analysis of path dependence in work-of-separation under normal and tangential loading.
• Verification using compression tests on a standard hexagonal structure.
• Application to simulate the mechanical behavior of bone's extrafibrillar matrix.

Main Results:

• The model successfully characterizes attractive and repulsive interfacial interactions.
• Path dependence analysis confirmed smooth work-of-separation transformations.
• The model demonstrated consistency with cohesive constitutive modeling principles.
• Numerical results showed reasonable agreement with analytical solutions in the linear elastic region.
• Simulations of bone matrix mechanics aligned well with experimental fracture observations.

Conclusions:

• The improved interfacial bonding model provides a robust framework for analyzing polycrystalline materials.
• The model's ability to predict complex interfacial behaviors and material responses, including bone fracture, is validated.
• This work offers a valuable tool for materials design and mechanical analysis.