選択レーザー溶融技術のマクロスケール数値シミュレーションのための新しい熱源モデルの比較研究と導入
Hao Zhang1, Shuai Wang2, Junjie Wang3,4
1School of Physics and Electronic Information, Yan'an University, Yan'an 716000, China.
Materials (Basel, Switzerland)
|February 13, 2026
まとめ
新しいダイナミックな熱源モデルは,セレクティブ・レーザー・メルトニング (SLM) での溶融池の寸法を正確に予測し,欠陥削減のためのシミュレーションを改善します. この高度なモデルは,追加製造プロセスの信頼性を高めます.
科学分野:
- マテリアルサイエンス 材料科学
- 機械工学の機械工学
- コンピューティング・モデリング
背景:
- セレクティブレーザーメルトリング (SLM) は,複雑な金属部品のための重要な添加物製造 (AM) テクノロジーです.
- メルトプールダイナミクスの正確なシミュレーションは,SLMプロセスのパラメータを最適化し,毛穴性などの欠陥を最小限に抑えるために重要です.
- SLMシミュレーションにおける伝統的な熱源モデルは,溶融池の幅と深さを予測する上で限界があります.
研究 の 目的:
- SLMシミュレーションのための新しいダイナミック熱源モデルの開発と検証.
- 異なる熱源モデルのメルトプール幾何学と温度フィールドへの影響を調査する.
- SLMにおけるメルトプール形態の予測のための数値シミュレーションの精度を向上させる.
主な方法:
- ANSYS APDLを使用した 3D トランジエンタル熱伝導有限要素モデルの構築.
- 4つの熱源モデルのシミュレーションと比較:ガウスの表面,回転ガウスの体積,二重の円体,そして組み合わせられたモデル.
- 調整可能なエネルギー吸収比率を持つ表面および体積の熱源を組み合わせたダイナミックな熱源モデルの提案と分析.
主要な成果:
- 提案されたダイナミック熱源モデルは,溶融池の幅128.6μmと深さ63.13μmを達成した.
- このモデルは,他のモデルと比較して,かなり広い溶融プールと ~17% の深さをもたらしました.
- 実験的検証では,幅の1.0%,深さの5.5%という低い相対誤差が示され,高い予測精度が確認されました.
結論:
- ダイナミック・ヒート・ソース・モデルは,SLMにおけるメルトプールの大きさを正確に予測し,従来のモデルを上回っています.
- このモデルは,実際のメルトプールの形態を効果的に捉え,プロセスの最適化のためのシミュレーションの信頼性を高めます.
- この発見は,多孔性の欠陥を抑制し,SLM加工部品の全体的な品質を改善することに寄与しています.
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