Airworthiness verification of additive manufacturing technology for large integral metallic structure

Abstract

In order to solve the problems existing in airworthiness verification of the large integral metallic structure for civil aircraft main bearing part, the airworthiness verification of the metallic structure additive manufacturing technology was carried out. Through the analysis of applicable airworthiness clauses of additive manufacturing technology, the general idea of airworthiness verification of the metallic structure additive manufacturing technology of civil aircraft is given, including the establishment of material specification, the determination of material strength properties, the selection of structural special factor, and the verification of structural performance. Each verification method gives a specific implementation approach. Taking outer cylinder of the nose landing gear pillar which is made by additive manufacturing technology with A-100 ultrahigh strength steel as an example, a specific implementation plan for airworthiness verification of additive manufacturing technology for large integral metallic structure is given.

Keywords

• additive manufacturing
• airworthiness verification
• material specification
• material strength properties
• structural special factor
• structural verification