2010/02/19 by Vincent Langlois, Xiaoping Jia, Langlois, Vincent +1
Engineering · Physics and Astronomy · #Adhesion, Friction, and Surface Interactions #FOS: Physical sciences #Granular flow and fluidized beds #Materials Science (cond-mat.mtrl-sci) #Powder Metallurgy Techniques and Materials #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1002.3772
to be published in Powder Technology, 8 pages, 8 figures
arxiv created 2010/02/19 · openalex publication_date 2010/02/19 · arxiv updated 2010/02/26 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
Ultrasound transmission in PMMA spherical bead packings is investigated during the sintering process under stress. Velocity and amplitude measurements of coherent longitudinal waves are performed to monitor the evolution of the elastic properties of the solid frame from noncohesive packing to sintered granular material. Comparison between the experimental velocity data and the prediction by a contact model [Digby, J. Appl. Mech. 48, 803, (1981)] reveals the crucial role of the bonding effect on the mechanical behavior of granular compacts. By using the correlation technique of acoustic speckles, we also observe the important rearrangements in granular packings before the onset of sintering.