Damage Self-healing Of Resin Matrix Composites Based On Microtubular Network Carrier

Cracks and other defects are easily produced in the use of composite materials.If it is not repaired in time,it will shorten the service life and even bring serious safety accidents.In this paper,based on the self-healing mechanism of external damage,and taking the self-healing of resin matrix as the goal,the NSGA-II algorithm is applied to optimize the topology of microtubular network carrier.According to the optimization results,the microtubula network is made to test the interoperability of the network carrier and the mechanical compatibility of the composite material.And select the appropriate light healing agent to complete the light repair experiment and test the repair effect.Firstly,aiming at the structural optimization of the microtubula network carrier,the two objective functions of the mechanical compatibility and head loss are determined.The NSGAII algorithm is used to optimize the microtubula network model to obtain a set of Pareto optimal solution sets.The optimization results are further selected by calculating the variances of parameters such as pipe diameter,flow rate,head loss,and flow rate for each Pareto optimal solution,Pick out the pipe diameter parameters that can be used for the actual preparation of the microtubula network.Secondly,based on the optimization results of the microtubula network topology obtained by the NSGA-II algorithm,the network carrier is developed and embedded in the composite material to prepare the self-healing model.The experiment verified the interoperability of the microtubula network carrier and the mechanical compatibility of the microtubula network carrier and the composite material.The experimental results show that the internal of the pipe network carrier has good interoperability,the repair agent can fill the entire network well,and the average failure load of the sample after adding the network carrier is 91.63% of the samples not added to the network carrier.Finally,a set of healing agent circulation replenishment device was designed.A short-wave visible light curing adhesive was used as a light restoration agent,and a three-point bending test was used to perform a self-healing experiment.The self-healing process was observed,and the experimental data were compared with the test samples buried with network but not filled with the healing agent.The results show that the maximum failure load of the sample can be increased by 7.52% when the healing agent is introduced into the network carrier.After the sample is broken,the average failure load of the sample after repair can reach 17.86% before the repair.The research results in this paper provide a technical reserve for the damage self-healing of composite materials,which has important practical significance and wide application fields.