Date of Award

4-2009

Degree Name

Master of Science in Engineering

Department

Mechanical and Aeronautical Engineering (to 2013)

First Advisor

Dr. James Kamman

Second Advisor

Dr. Koorosh Naghshineh

Third Advisor

Dr. Judah Ari-Gur

Access Setting

Masters Thesis-Campus Only

Abstract

This thesis shows the development of a fully 3-D finite element analysis model whereby the motion of multiple real-shaped fabrics is predicted for tumbling, satellization, and even higher speeds inside a spinning horizontal drum. The simulation results were found to be accurate compared to theory for fabric tension and shear. The fabric simulation model performance was verified by comparing it to the steady-state result of experimental testing with fabric draping on a table and hanging from a hook. Also, high speed video was used to compare physical tests of fabric motion in a spinning horizontal drum to the simulation result. The effects of changing the fabric mechanical properties were studied, as well as drum speed. The results of all these validation tests were generally very favorable.

The developed fabric simulation model was then used to predict the load distribution, including the imbalance magnitude and location for a given load size, drum geometry, speed history, etc. The effects of water extraction are included. Three different load sizes and speed histories were chosen to compare the motion of the fabrics up to a maximum speed of 600 rpm. It was found that the load size and speed history before fabric satellization have the greatest effect on the created drum moment.

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