Author : Gowtham Venkatraman
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)
Book Synopsis Process Modeling of Ultrasonic Additive Manufacturing by : Gowtham Venkatraman
Download or read book Process Modeling of Ultrasonic Additive Manufacturing written by Gowtham Venkatraman and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasonic additive manufacturing (UAM) is an additive manufacturing technology which combines ultrasonic metal welding, CNC machining, and mechanized foil layering to create large gapless near net-shape metallic parts in solid state. Its integration with subtractive processes enables the creation of complex design features such as heat exchangers. The low formation temperature of the UAM process allows the integration of temperature-sensitive components, smart materials, cooling channels, organic polymers, and electronics into metal matrices. UAM is currently limited to niche applications, as resource-intensive trials are required to evaluate the feasibility of joining new material combinations due to a lack of process models in the literature with predictive ability to establish process-property relationships. The key thrusts of this research are to characterize the energy flow in the UAM process, investigate the role of cold working and friction on UAM bond strength, and develop an energy-based model for process-property relationships of UAM builds. Analytical and finite element (FE) models are used to describe the state of stress under plastic deformation in UAM. An empirical model is developed between the estimated energy of plastic deformation, a driver of bond quality in UAM, and the measured strength of the weld interface in shear. In-situ measurements are conducted using a Doppler velocimetry to monitor the in-situ vibration dynamics of the foil during UAM and to characterize energy losses associated with friction. Each objective is accompanied by analytical, finite element, or experimental findings to aid and supplement the effort.