Title

Failure in Metal Honeycombs Manufactured by Selective Laser Melting of 304 L Stainless Steel under Compression

Abstract

Cellular structures, specifically honeycombs, are commonly used as core materials in sandwich structures. This is especially true in aerospace applications where high bending and out-of-plane compressive stiffness coupled with low component weight is required. Additive manufacturing techniques are well suited for the manufacture of such cellular structures in a cost-effective manner. The current work focuses on honeycombs using selective laser melting of 304 L stainless steel. The mechanical behaviour of honeycombs was evaluated using out-of-plane compression tests. A numerical model was built to describe failure of the additively manufactured honeycombs. Compression tests were performed, on cylindrical samples to build the nonlinear material model. The material behaviour was found to be dependent on the build direction. Results of experiments and simulation show that failure occurs through a plastic buckling mechanism.

Department(s)

Materials Science and Engineering

Second Department

Mechanical and Aerospace Engineering

Comments

Article in Press

Keywords and Phrases

3D printers; Aerospace applications; Austenitic stainless steel; Cellular automata; Cellular manufacturing; Compaction; Compression testing; Coremaking; Cost effectiveness; Honeycomb structures; Melting; Numerical models; Compressive stiffness; Cylindrical samples; Laser melting; Manufacturing techniques; Mechanical behaviour; Nonlinear material models; Out-of-plane compression; Selective laser melting; Failure (mechanical); Additive manufacturing; Compression; Metal honeycombs; Numerical model; Selected laser melting

International Standard Serial Number (ISSN)

1745-2759; 1745-2767

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Taylor & Francis, All rights reserved.

Share

 
COinS