Evaluation of cryogenic performance of adhesives using composite–aluminum double-lap joints

In the development of a cryogenic propellant tank, the proper selection of adhesives to bond the composite and liner is important for the safety of operation. In this study, three types of adhesives were tested for the ability to bond CFRP composites developed for cryogenic use and aluminum alloy (Al 6061-T6) for lining the tank using double-lap joint specimens. The double-lap joint specimens were tested inside an environmental chamber at room temperature and cryogenic temperature (−150 °C), respectively to compare the bond strength of each adhesive and fracture characteristics. The material properties with temperature of component materials of double-lap joints were measured. In addition, ABAQUS was used for the purpose of analyzing the experimental results.