Topology-Optimized Design for WAAM Fabrication

Structural shape optimization through topology analysis, achieving high design quality and overall weight reduction. Chair design and 3D modeling developed for metal 3D printing (WAAM).

Approach

XENCE derived the form through topology optimization and handled the design and 3D modeling on the premise of fabrication by WAAM (Wire Arc Additive Manufacturing). As a joint project with Daido Steel, Takenaka Corporation, and Shimoda Flange, a stool made with Daido Steel's duplex stainless steel welding wire (YS329J4L) was WAAM-fabricated and installed outdoors at Daido Steel's Hoshizaki Plant in Nagoya. It functions as a test specimen for long-term durability evaluation under real-world conditions.

Result

Seven months after installation, the piece made from duplex stainless steel (YS329J4L) shows good corrosion resistance with no visible change in appearance (the comparison material, YS308L, showed discoloration from rust). It demonstrates both the fabrication of complex organic forms by WAAM and the durability of Daido Steel's welding wire material, advancing technical validation toward the practical application of metal 3D printing in the construction and infrastructure fields.

Partners

Daido Steel Co., Ltd., Takenaka Corporation, Shimoda Flange Co., Ltd.