Title page for ETD etd-07282008-135807

Type of Document

Master's Thesis

Author

Lee, Edward Chungjen

URN

etd-07282008-135807

Title

A study of the static to kinetic friction transition of polymers

Degree

Master of Science

Department

Mechanical Engineering

Advisory Committee

Advisor Name	Title
No Advisors Found

Keywords

structural polymers

Date of Defense

1995-05-01

Availability

unrestricted

Abstract

This study investigates the transition from static to kinetic friction for structural polymers and continues previous research conducted by Dr. N. S. Eiss, B. McCann, and R. Molique. A new test apparatus which simultaneously measures friction, normal load, and relative velocity was developed to study this transition. The polymers used in this study were nylon, ABS, polycarbonate, and fiberglass filled and unfilled polypropylene. Creep effects of polymers on the static coefficient and thus the drop in friction was investigated. Friction tests were conducted to determine the effect of normal load, surface roughness, and material composition on the transition from static to kinetic friction. A double value friction-velocity relationship was found whenever a drop in friction occurred. The material composition seems have a larger effect on friction induced vibrations than surface roughness. A few conclusions about why certain static to kinetic transitions occur are made. This study investigates the transition from static to kinetic friction for structural polymers and continues previous research conducted by Dr. N. S. Eiss, B. McCann, and R. Molique. A new test apparatus which simultaneously measures friction, normal load, and relative velocity was developed to study this transition. The polymers used in this study were nylon, ABS, polycarbonate, and fiberglass filled and unfilled polypropylene. Creep effects of polymers on the static coefficient and thus the drop in friction was investigated. Friction tests were conducted to determine the effect of normal load, surface roughness, and material composition on the transition from static to kinetic friction. A double value friction-velocity relationship was found whenever a drop in friction occurred. The material composition seems have a larger effect on friction induced vibrations than surface roughness. A few conclusions about why certain static to kinetic transitions occur are made.

Files

Filename		Size	Approximate Download Time (Hours:Minutes:Seconds)
Filename		Size	28.8 Modem	56K Modem	ISDN (64 Kb)	ISDN (128 Kb)	Higher-speed Access
	LD5655.V855_1995.L42.pdf	3.42 Mb	00:15:50	00:08:08	00:07:07	00:03:33	00:00:18

next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.