ABSTRACT
Compared with metal structures, composite structures’ defects and damage modes are invisible and not easily detected. If these defects or damages can't be found in time as early as possible by users and maintainers, they may lead to a sudden failure of structure and unexpected disaster. Therefore, as for large civil aircraft composite structures such as wings and fuselages, all the design philosophy, load spectrum and structure parameters have to be comprehensively validated and verified in both concept design and detailed design stage by ground or flight test such that reliable structural design methods are formed to guide the engineering development. Structural health monitoring technologies can obtain these parameters such as loads, deformation and damage growth of key structures in the process of airworthiness verification test, while will not increase the structure weight and the energy supply.
