Parallel Optimization Of Macroscopic Configuration And Microvascular Network Carrier For Self-Healing Material

In order to repair fine damage of materials in real time and avoid major safety risks,this study focused on the mutual influence between macro structure and microcarrier in topology optimization of microtubular-based self-healing materials,and proposed a parallel optimization method of macro structure of self-healing materials and micropipe network carrier,so as to ensure that while meeting the mechanical property requirements of macro structure,improve the damage self-repair performance of micropipe network carrier.Specific research contents are as follows:Firstly,the parallel optimization method of macro structure and meso microvascular network carrier for self-healing material was proposed.Based on MMC method,a mathematical model of single/multiple components for self-healing material was established.The study takes the structural compliance of the macro structure for self-healing material,the head loss and the total length of the microvascular network carrier as the objective function,and takes the volume of the self-healing material used,and the upper limit of the ratio between the volume of the microvascular network carrier and the volume of the self-healing material used as the constraint conditions.The macro and meso parallel optimization column of the self-healing material was established.Based on the MMC method and the Hardy Cross,the Pareto non-inferior solution sets of three objective functions were calculated according to Pareto criterion.Secondly,through the classical short cantilever beam and MBB beam examples,the parallel optimization method of macro structure and meso microvascular network carrier for self-healing material was numerically analyzed.The optimization results show that the optimization method can generate a large number of Pareto non-inferior solutions,and the corresponding topology structure with built-in microvascular network carrier is similar to the optimal topology structure without the carrier,and the macro structure compliance is similar.And the topology structure with built-in microvascular network carrier meets the requirements of mechanical properties and self-healing performance.It shows that this optimization method can realize the integrated design of structure and function.The feasibility of parallel optimization method of macro structure and meso microvascular network carrier for self-healing material was proved.Finally,the mechanical properties of the macro structure for the self-repairing material were verified by experiments.The experimental results show that the mechanical properties of two MBB beams with built-in microvascular network carrier are respectively 93.65%(self-repairing material component with built-in single microvascular carrier)and 96.34%(self-repairing material component with built-in multiple microvascular carrier)of that the MBB beam structure without carrier,and the mechanical properties do not decrease significantly.Compared with the optimization results of the corresponding MBB beam example,the MBB beam with built-in microvascular network carrier are respectively 97.77%and 97.86% of that the MBB beam without carrier.The experimental results are basically the same as the optimization result,which verifies the effectiveness of the parallel optimization method macro structure and meso microvascular network carrier for self-healing material.