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About this Abstract
Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Towards SmartScan 3.0: A Scan Sequence Optimization Approach for Distortion Reduction in LPBF using Reduced-Order Thermo-Elasto-Plastic Models
Author(s) Tao Liu, Chinedum Okwudire
On-Site Speaker (Planned) Tao Liu
Abstract Scope In Laser Powder Bed Fusion (LPBF), scan sequence strongly influences residual-stress-driven distortion, yet it is often chosen heuristically because thermo-elasto-plastic models are too costly for large-design-space search. We present a first step towards SmartScan 3.0, an approach that uses a reduced-order thermo-elasto-plastic model (ROM) for scan-sequence optimization. The ROM couples a finite-difference thermal solver with a history-dependent plastic-strain update to predict distortion. ROM predictions are validated against a commercial finite element solver. A search-based optimization over a jump parameter identifies a preliminary SmartScan 3.0 sequence that significantly reduces distortion in laser-marking experiments vis-a-vis SmartScan 1.0 (thermal-model) and 2.0 (thermo-elastic-model) approaches.
Proceedings Inclusion? Undecided

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