FEATURE Synthetic Epoxy Foam Self-healing Synthetic Epoxy Foam under Cyclic Quasi-Static Compressive Loading Shunze Cao*, Tao Liu Centre for Structural Engineering & Informatics, Faculty of Engineering, University of Nottingham, United Kingdom NG7 2RD *Email: evxsc13@nottingham.ac.uk ABSTRACT T here is an increasing interest in developing materials to restore stiffness or strength by itself after damage in the defence and aerospace applications. However, to activate the healing function, some external factors, e.g. heating and pressure need to be employed. The aim of this study is to develop double layer sodium alginate capsules to heal the damage locations automatically without external intervention. Double layer alginate capsules were manufactured semi-automatically in this research and were selected as the healing agent carriers. The multiple self-healing effects has been achieved through a cyclic quasi-static compressive test. 38 | SAMPE JOURNAL | J A N UA R Y/ F E B R UA R Y 2 0 2 1 w w w. s a m p e . o r ghttp://www.sampe.org