An alternative explanation of forming force reduction for forming process submitted to vibration: Influence of the waveform in the viscoplastic domain
Article dans une revue avec comité de lecture
Date
2016Journal
Journal of Materials Processing TechnologyAbstract
This article addresses the effects of vibrations on a viscoplastic workpiece applied during the forgingprocess. To achieve this goal, a phenomenological model based on the slice method combined with aNorton–Hoff viscoplastic law is developed. It allows to study the impact of vibration on the reductionof the mean forging load which has been experimentally observed before, and demonstrates that thesensitivity to strain rate is a key parameter. Moreover, based on the model, a new waveform of thevibrations is proposed that enhance the mean forging load reduction. Finite element simulations andexperiments have been performed to evaluate the validity of the model in the case of sinusoidal andtriangular waveforms, and are in good agreement with the analytical model’s predictions.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Communication sans acteKHAN, Armaghan; NGUYEN, Thanh Hung; ABBA, Gabriel; LEMAIRE-SEMAIL, Betty; GIRAUD-AUDINE, Christophe (2013)Use of vibration in the forming process has already shown numerous advantages in the improvement of mechanical and surface properties of workpiece such as good surface or less friction between die and workpiece. The aim ...
-
Effects of Vibrations on Metal Forming Process: Analytical Approach and Finite Element Simulations Communication avec acteVibration assisted forming is one of the most recent and beneficial technique used to improve forming process. Effects of vibration on metal forming processes can be attributed to two causes. First, the volume effect links ...
-
Article dans une revue avec comité de lectureKHAN, Armaghan; NGUYEN, Thanh Hung; ABBA, Gabriel; LEMAIRE-SEMAIL, Betty; GIRAUD-AUDINE, Christophe (EDP Sciences, 2014)Application of vibration in metal forming process has already shown numerous advantages in the past. It improves not only mechanical and surface properties of workpiece but the integration of vibration in metal forming ...
-
Experimentally valided approach for the simulation of the forging process using mechanical vibration Article dans une revue avec comité de lectureIn this study, an experimental setup of a forging process has been designed which allows to apply vibrations to the lower die of amplitude ranging from 0 to 80 ?m at frequencies varying from 1 to 130Hz thanks to the use ...
-
Communication avec acteNGUYEN, Thanh Hung; AMBERG, Michel; LEMAIRE-SEMAIL, Betty; ABBA, Gabriel; GIRAUD-AUDINE, Christophe (IEEE, 2014)This paper presents the design of a mechatronic system integrating iezoelectric multi-actuators, which is used to generate low-frequency vibrations to assist the forging process. With the aim of controlling the complete ...