Abstract
Dynamic parameters, such as restitution and friction coefficients are important for powder flow simulations of laser based deposition processes. These parameters are difficult to find, especially for industrial metal powders. This paper introduces an optical method for measuring restitution and friction coefficients. The free falling powder flow was illuminated by a laser sheet. In order to obtain particle velocity, streaks proportional to particle velocities was generated by laser pulse obtained by a chopper. Recorded imaged were analyzed to determine particle velocities both before and after various impact conditions as well as impact parameters.
Recommended Citation
T. E. Sparks et al., "Determination of Dynamic Powder Modeling Parameters via Optical Methods," Proceedings of the 16th Annual Solid Freeform Fabrication Symposium (2005, Austin, TX), pp. 308 - 314, University of Texas at Austin, Aug 2005.
Meeting Name
16th Annual Solid Freeform Fabrication Symposium (2005: Aug. 1-3, Austin, TX)
Department(s)
Mechanical and Aerospace Engineering
Research Center/Lab(s)
Intelligent Systems Center
Document Type
Article - Conference proceedings
Document Version
Final Version
File Type
text
Language(s)
English
Publication Date
03 Aug 2005
Comments
This research was supported by the National Science Foundation Grant Number DMI- 9871185, Army Research Office, and Air Force Research Laboratory and UMR Intelligent Systems Center. Their support is appreciated.