Numerical simulation method for damage and healing mechanisms of microcapsule self-healing materials

Abstract

The invention discloses a numerical simulation method for damage and healing mechanisms of microcapsule self-healing materials. The method comprises the following steps of: a. constructing a unit cellmodel of a material; b. dividing finite element meshes for unit cells; c. giving a matrix and microcapsules material properties; d. establishing a fluid-solid coupling relation by adopting a coupledeulerian-lagrangian method; e. applying load and submitting analysis; f. viewing results and revealing the damage and healing mechanisms of the material; and g. carrying out parameter analysis and optimization design. The method has the beneficial effects that the flow-solid coupling numerical method is adopted for the first time to simulate the damage starting and expanding processes of the microcapsule self-healing materials under the action of the load and reveal the intrinsic mechanisms of the damage and the healing of the microcapsule self-healing materials; and a theoretical basis can beprovided for the optimization design of the microcapsule self-healing materials, so that the development of the self-healing materials with better performance is benefitted.

Description

technical field [0001] The invention belongs to the field of material mechanics, in particular to a numerical simulation method for damage and healing mechanism of microcapsule self-healing materials. Background technique [0002] During the use of materials, under the influence of load and environmental factors, it is inevitable that micro-crack damage will occur inside. The appearance and propagation of microcracks degrades the performance of materials, affects their service life, and poses a potential threat to structural safety. Therefore, humans hope to develop a structure / function integrated material that can detect and repair microcracks in the material as soon as possible, which is the so-called self-healing material. Among them, the microcapsule self-healing material is one of the most concerned self-healing materials. Its principle is to implant the microcapsules coated with the repair agent and the catalyst into the matrix material, and cause the microcapsules to...

AI Technical Summary

Problems solved by technology

However, the current research on microcapsule self-healing materials is basically based on the design of materials based on experience, and then characterizes and evaluates the performance of materials through experimental means, and does not fundamentally understand its damage and healing mechanisms, as well as the materials. Factors Influencing Healing Effects

This is not conducive to the optimization of material properties

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