Research progress on failure behaviors of composite-metal connection structures

Objectives There are requirements for the connection design of composite and metal hybrid structures because of the widespread use of composite materials in engineering, which makes their combination with metal structures inevitable. Methods Therefore, This paper reviews the current status of research on strength and failure analysis of bolted connections of metal-composite hybrid structures both domestically and internationally, analyzes the influence of factors such as joint connection form, assembly gap, geometric parameters, composite layer design, bolt tightening force, and service environment on the mechanical properties and failure mode of metal-composite hybrid connection structures, and discusses in detail the failure mechanism of metal-composite hybrid structures under the combined action of temperature and mechanical loads. In addition, the relevant research work on the failure behavior of metal-sandwich composite connection structures is summarized. Results Conclusions Some experimental methods and numerical models developed currently can be used to assist in the design of composite-metal bolted joints, which can promote the rapid development and application of composite materials in ship constructions.