Shop : Details
Shop
Details
Heyuan Wang
Numerical Simulation of Deformation and Damage of Lattice Structures Made of Austenitic Stainless Steel Manufactured via Laser Powder Bed Fusion
The additive manufacturing (AM) industry has proliferated in recent years, the materials used in AM is expanded, and the application of AM products extends from prototype development to end-product manufacture. Among the AM techniques, the laser powder bed fusion (LPBF) attracts the most attention. The LPBF uses a laser to melt metal powder layer-wise to produce free-form products, such as the lattice structure. The lattice structure is known for its high stiffness-to-weight ratio, high strength-to-weight ratio, and outstanding designability. However, we are yet to thoroughly understand the mechanical behavior of the LPBF
materials and lattice structures. Being able to predict such products’ mechanical behavior by considering the LPBF characteristics becomes more crucial than ever.
The most remarkable distinct characteristics between the LPBF and conventional materials are the process-induced porosities and material anisotropy. To understand the effects of the LPBF porosities and material anisotropy, we derive the plastic flow rule of the Gurson-Tvergaard-Needleman (GTN) model for the Hill’48 yield criterion to form the coupled GTN-Hill’s model. Then, the proposed model is implemented in ABAQUS with the UMAT subroutine. The effects of porosity and material anisotropy on lattice structures’ mechanical behaviors under static tensile loading and ultra-low cyclic loading are investigated.
In the experimental aspect, the bulk samples are tested under static tensile loading to derive the material behavior; the fractography is performed to identify the failure modes. To compare with the simulation results, we perform both tension and ultra-low cycle fatigue experiments on the lattice structures. In the end, the tensile fracture surfaces of the lattice structure are examined.
The most remarkable distinct characteristics between the LPBF and conventional materials are the process-induced porosities and material anisotropy. To understand the effects of the LPBF porosities and material anisotropy, we derive the plastic flow rule of the Gurson-Tvergaard-Needleman (GTN) model for the Hill’48 yield criterion to form the coupled GTN-Hill’s model. Then, the proposed model is implemented in ABAQUS with the UMAT subroutine. The effects of porosity and material anisotropy on lattice structures’ mechanical behaviors under static tensile loading and ultra-low cyclic loading are investigated.
In the experimental aspect, the bulk samples are tested under static tensile loading to derive the material behavior; the fractography is performed to identify the failure modes. To compare with the simulation results, we perform both tension and ultra-low cycle fatigue experiments on the lattice structures. In the end, the tensile fracture surfaces of the lattice structure are examined.
Schlagwörter: Additive manufacturing; Laser Powder Bed Fusion; Damage simulation; Lattice Structures; Gurson-Tvergaard-Needlemen; GTN; Austenitic stainless steel
Werkstoffanwendungen im Maschinenbau
Herausgegeben von Prof. Dr.-Ing. Christoph Broeckmann, Aachen
Band 28
Verfügbare Online-Dokumente zu diesem Titel
Sie benötigen den Adobe Reader, um diese Dateien ansehen zu können. Hier erhalten Sie eine kleine Hilfe und Informationen, zum Download der PDF-Dateien.
Bitte beachten Sie, dass die Online-Dokumente nicht ausdruckbar und nicht editierbar sind.
Bitte beachten Sie auch weitere Informationen unter: Hilfe und Informationen.
Bitte beachten Sie auch weitere Informationen unter: Hilfe und Informationen.
| Dokument |  | Gesamtdokument | ||
| Dateiart |  | |||
| Kosten |  | 44,10 € | ||
| Aktion |  | Zahlungspflichtig kaufen und download der Datei | ||
| Dokument |  | Inhaltsverzeichnis | ||
| Dateiart | | |||
| Kosten |  | frei | ||
| Aktion |  | Download der Datei | ||
Benutzereinstellungen für registrierte Online-Kunden (Online-Dokumente)
Sie können hier Ihre Adressdaten ändern sowie bereits georderte Dokumente erneut aufrufen.
Benutzer
Nicht angemeldet
Export bibliographischer Daten
Shaker Verlag GmbHAm Langen Graben 15a52353 Düren
Mo. - Do. 8:00 Uhr bis 16:00 UhrFr. 8:00 Uhr bis 15:00 Uhr
Kontaktieren Sie uns. Wir helfen Ihnen gerne weiter.
