图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
多孔介质期刊
影响因子: 1.49 5年影响因子: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v12.i11.10
pages 1019-1035

Dynamic Compaction of Soft Compressible Porous Materials: Experiments on Air-Solid Phase Interaction

Michel Al-Chidiac
Department of Mechanical Engineering, The City College of New York, CUNY
Parisa Mirbod
City college
Yiannis Andreopoulos
Department of Mechanical Engineering, The City College of New York, CUNY
Sheldon Weinbaum
Department of Biomedical Engineering, The City College of New York, CUNY

ABSTRACT

An experiment has been designed to examine the generation of dynamic lift forces during compaction of soft highly compressible fibrous materials in a piston/cylinder apparatus. Novel experimental techniques have been developed to simultaneously measure and separate out the dynamic forces acting on the compressing piston by the air and solid phases, respectively. The measurements clearly demonstrate that the excess pore pressure builds up inside the porous material and reaches its maximum before there is any significant rise in the solid-phase force. The air pressure subsequently decays due to air venting into the ambient environment at the edges of the testing apparatus as the solid phase force rapidly rises. We also examine the internal stresses and strains within the solid phase that develop as a result of friction forces along the sidewalls of the cylinder and show that these lead to important hysteresis effects when the loads on the piston are gradually removed. The experiments are performed on a polyester material with a trace of silk, which has recently been proposed for a soft porous track wherein a high-speed train is supported by a large planing surface or ski that rides within a confined channel in which this venting is substantially reduced or eliminated (Mirbod et al, 2009).


Articles with similar content:

Evaluation of Wear Damage During a High Speed Scenario
3rd Thermal and Fluids Engineering Conference (TFEC), Vol.23, 2018, issue
Dr. William P. Baker, Lt Col Armando DeLeon, Anthony N. Palazotto
DYNAMIC COMPRESSION OF SOFT POROUS MEDIA: FROM FINITE TO INFINITE DOMAIN
Journal of Porous Media, Vol.14, 2011, issue 1
Rungun Nathan, Robert Crawford, Kei-Peng Jen, Qianhong Wu
IN-FLIGHT MEASUREMENT OF PARTICLE SIZE AND VELOCITY IN A RADIO FREQUENCY PLASMA TORCH
Progress in Plasma Processing of Materials, 1999, Vol.1, 1999, issue
S. Nguyen-Kuok, Jacques Amouroux, F. Krayem, Sergey V. Dresvin, Daniel Morvan, E. Francke
POROUS SCREEN APPLIED IN LIQUID ACQUISITION DEVICE CHANNEL AND CFD SIMULATION OF FLOW IN THE CHANNEL
Journal of Porous Media, Vol.15, 2012, issue 5
Nengli Zhang , David F. Chao, David J. Chato, Brian J. Motil, John B. McQuillen, Michael P. Doherty
SYNCHRONIZED IMAGERY ASSESSMENT OF HYDRODYNAMIC RAM CAVITY FEATURES TO TRANSIENT SPRAY
Journal of Flow Visualization and Image Processing, Vol.23, 2016, issue 3-4
E. T. Brickson, D. Liu, M. F. Reeder, Andrew J. Lingenfelter