Finite-element simulation of axisymmetric preforms in precision forging at elevated temperatures (EN)

Mamalis, AG (EN)

Baldoukas, AK (EN)

Manolakos, DE (EN)

The explicit FE code DYNA 3D was used to simulate precision forging at elevated temperatures (warm- and hot-working conditions) of two axisymmetric preforms, namely a conical shell and a bevel gear preform. For simple and quick calculations the coupled thermomechanical process was simulated as an isothermal mechanical process for a particular temperature distribution of the steel preform. The metal flow, preform profiles, forging loads, stress and strain distributions in the workpiece and the tooling are well predicted by this technique. The upper-bound elemental technique (UBET), a kinematic admissible upper-bound approach, was also employed for quick engineering-approximation prediction of the forging loads and metal flow for the axisymmetric preform. The results obtained from the two simulating techniques are in good agreement for the forging loads, up to a particular degree of deformation, whilst the material flow is well predicted by the FEM but is only approximated when UBET is employed. (EN)

journalArticle (EN)

Deformation (EN)

Computer software (EN)

Forging loads (EN)

Materials Science, Multidisciplinary (EN)

Axisymmetric preforms (EN)

Working Conditions (EN)

Temperature Distribution (EN)

Loads (forces) (EN)

Software package DYNA 3D (EN)

Upper Bound (EN)

Finite element method (EN)

Preform profiles (EN)

Forging (EN)

Flow of fluids (EN)

Material Flow (EN)

Upper bound elemental technique (UBET) (EN)

Kinematics (EN)

Precision forging (EN)

Engineering, Manufacturing (EN)

Approximation theory (EN)

Metal flow (EN)

Stress concentration (EN)

Temperature distribution (EN)

Computer simulation (EN)

High temperature operations (EN)

Strain (EN)

Elevated Temperature (EN)

Engineering, Industrial (EN)

Finite Element Simulation (EN)

Simulation Technique (EN)

Εθνικό Μετσόβιο Πολυτεχνείο

Ψηφιακό Αποθετήριο της Κεντρικής Βιβλιοθήκης του ΕΜΠ | Dspace@NTUA

Κεντρική Βιβλιοθήκη Ε.Μ.Π.

Ιδρυματικό Αποθετήριο

Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά

Journal of Materials Processing Technology (EN)

Αγγλική γλώσσα

1996 (EN)

http://hdl.handle.net/123456789/11888

111 (EN)

57 (EN)

ISI:A1996UH13700015 (EN)

103 (EN)

1-2 (EN)

0924-0136 (EN)

10.1016/0924-0136(96)81423-3 (EN)

ELSEVIER SCIENCE SA LAUSANNE (EN)