DISTORTION PREDICTION AND MINIMISATION IN ADDITIVE MANUFACTURING

A method of minimising distortion in a workpiece is described that includes utilizing a computer system to carry out finite element analysis on a finite element thermo- mechanical model of the workpiece during and after fabrication by additive manufacturing to predict shape distortion and residual s...

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Bibliographic Details
Main Authors BARNES, JOHN, LATHABAI, SRINIVASARAO, MILLER, ANTHONY, COLEMAN, GARY, HELVEY, AMY, MARIE, FENG, YUQING, NGUYEN, VU, THUA
Format Patent
LanguageEnglish
French
Published 10.12.2015
Subjects
ADDITIVE MANUFACTURING TECHNOLOGY
ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PERFORMING OPERATIONS
PHYSICS
TESTING
TRANSPORTING
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Summary:A method of minimising distortion in a workpiece is described that includes utilizing a computer system to carry out finite element analysis on a finite element thermo- mechanical model of the workpiece during and after fabrication by additive manufacturing to predict shape distortion and residual stress development in the workpiece, wherein the fabrication includes the fabrication step of depositing multiple layers of a material melted by a heat source along a deposit path on a substrate, and introducing alterations to the workpiece prior to or during fabrication to compensate for the predicted distortion. L'invention concerne un procédé destiné à réduire au minimum une distorsion dans une pièce à travailler, consistant à mettre en oeuvre un système informatique pour réaliser une analyse par éléments finis sur un modèle thermo-mécanique d'éléments finis de la pièce à travailler, pendant et après la fabrication, par fabrication additive, afin de prévoir une distorsion de forme et le développement d'une contrainte résiduelle dans la pièce à travailler, la fabrication consistant à déposer des couches multiples d'un matériau fondu par une source de chaleur le long d'un trajet de dépôt sur un substrat, et à introduire des altérations sur la pièce à travailler, avant ou pendant la fabrication, de sorte à compenser la distorsion prévue.
Bibliography:Application Number: WO2015AU00341