An All-Atom Simulation Study of Gas Detonation Forming Technique
Abstract
:1. Introduction
2. Methods and Materials
2.1. Interatomic Potentials
2.2. Description of the Morse Potential
2.3. Voids in the Workpiece Models
3. Results and Discussion
3.1. Blanking of the Workpiece due to Cylindrical Punch
3.2. Progress in Workpiece Deformation
3.3. Dome-Height versus Loading Speed
3.4. Failure Patterns
3.5. Influence of Material Flaws
4. Conclusions
- 1.
- With the increase in the rate of downward movement of the punch towards the workpiece, the ability of the material to take the desired shape (shape of the die) reduces, that is, the dome-height is inversely proportional to the loading speed.
- 2.
- At lower speeds (<2 Å/ps), the deformation is observed throughout the workpiece, starting from the point of contact in the middle. This is contrary to the deformations observed due to the higher loading speeds, where localized deformations occur due to the creation of slipping planes.
- 3.
- The nonlinear relationship between the dome-height and loading speeds is observed because of the difference in deformation mechanisms at low and high loading speeds.
- 4.
- With the increase in the loading speed, the failure patterns developed on the workpiece are increasingly severe.
- 5.
- The introduction of a material flaw does not produce worse patterns of failure. It creates a random spluttered failure in the middle zone of the workpiece. This is contrary to the assumption that random material flaw (random deleting of atoms) would lead to faster and more severe failure.
- 6.
- For the same loading speed, the ductility of the workpiece increases with the increasing percentage of material flaws.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Kulkarni, A.; Karkaria, V.; Nandgaonkar, M.; Patil, S.P.; Markert, B. An All-Atom Simulation Study of Gas Detonation Forming Technique. Metals 2021, 11, 611. https://doi.org/10.3390/met11040611
Kulkarni A, Karkaria V, Nandgaonkar M, Patil SP, Markert B. An All-Atom Simulation Study of Gas Detonation Forming Technique. Metals. 2021; 11(4):611. https://doi.org/10.3390/met11040611
Chicago/Turabian StyleKulkarni, Ambarish, Vispi Karkaria, Milankumar Nandgaonkar, Sandeep P. Patil, and Bernd Markert. 2021. "An All-Atom Simulation Study of Gas Detonation Forming Technique" Metals 11, no. 4: 611. https://doi.org/10.3390/met11040611