1 School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China 2 Hubei Key Laboratory of Modern Manufacturing Quality Engineering, Wuhan 430068, China
Abstract: With the growing demand for lightweight structures, composite materials are increasingly used in aviation, shipbuilding, automobiles, constructions, sports equipment and other fields. The connection methods of composite materials mainly include mechanical bonding and adhesive bonding. As an efficient and reliable connection method, adhesive bonding is particularly important in the connection of composite mate-rials and is an indispensable part. Due to the widespread use of adhesive joints in highly load-bearing structures, there is a growing demand for higher strength, longer life, and lower cost of these joints. By reviewing the latest research progress in improving the strength of composite adhesive joints, this summary discussed and compared the geometric optimization methods of existing composite adhesive structures, comprehensively analyzed the influence of various geometric factors on the strength of adhesive joints, including optimizing the overall and local structural design of adhesive joints, adjusting the stress mode and distribution of joints, reducing stress concentration in adhesive structures, and thereby improving the strength of adhesive joints. Finally, summarizing the prominent characteristics and limitations of these geometric methods to improve the efficiency of adhesive joint. This paper is helpful to expand the application of adhesive joints, and promote the development of composite material connection technology.
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