Post delineator mechanical fatigue evaluation
Title:
Post delineator mechanical fatigue evaluation
Author:
Zwahlen, Helmut T.
Personal Author:
Physical Description:
xiii, 121 pages : illustrations ; 28 cm
General Note:
Prepared in cooperation with the Federal Highway Administration and the Ohio Dept. of Transportation.
"April, 1989."
Contents:
Introduction -- Experimental approach -- Results. Review of damage -- Review of natural frequency and dynamic deflection (top of post test specimen) behavior -- Adjustment procedure to equalize the different free lengths of the post delineator test specimens -- Extrapolation of the static horizontal deflection from test specimens to a 48 inches free length post -- Preliminary testing for lexan delineator -- Preliminary test for XX, C, T and S posts -- Conclusions -- Testing recommendations -- Reference.
Abstract:
The mechanical fatigue performance to sinusoidal horizontal oscillations (at natural frequency of the post delineator test specimen, 16 in. free length) was investigated for four types of post delineators. One was an X-shaped post made of a polycarbonate material, two were fiberglass reinforced thermoplastic posts (T-shape and C-shape) and one was a round polyethylene tube. Three post delineator test specimens were tested for new post, post put into the ground and driven over once with the rear tire of a slow driving tractor, post driven over twice (in same direction) and post driven over three times.
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