Research Progress in Manufacturing and Modification Processes of Thermoplastic Sandwich Structural Composites
Sandwich structured composite materials have shown excellent application prospects in fields such as aerospace and new energy vehicle manufacturing due to their lightweight,high strength,impact resistance,and design flexibility.In recent years,thermoplastic sandwich structure composite materials made from thermoplastic composite materials have met the development trend of future green manufacturing.They not only have the advantages of flexible design,convenience,easy molding,and high production efficiency,but also have excellent rigidity and impact resistance.Therefore,they have become a research hotspot in the field of composite materials to achieve structural lightweight.In the face of common defects such as fiber fracture,delamination,or debonding in the practical application of thermoplastic sandwich structure composite materials,the current development of manufacturing processes for thermoplastic sandwich structure composite materials focuses on integrated design of structural functions and maximizing the fatigue resistance,corrosion resistance,and thermal performance of thermoplastic composite materials.This article focuses on the manufacturing processes of thermoplastic sandwich structure composite materials from three aspects:hot pressing,3D printing,and folding manufacturing.By comparing their mechanical properties and failure modes,the advantages and disadvantages of these manufacturing processes are analyzed,and the future development trends and application prospects of these three manufacturing processes are discussed.Secondly,in order to further improve the comprehensive performance of thermoplastic composite materials,the influence of reinforcement and toughening modification on the properties of thermoplastic sandwich structure composite materials,especially their energy absorption and impact resistance,was summarized.Finally,the influence of surface/core interface reinforcement processes on the properties of thermoplastic sandwich structure composites was reviewed,providing useful references for improving the manufacturing process and structural performance of thermoplastic sandwich structure composites,as well as designing new lightweight structures for transportation vehicles.
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