John W. Daws

John W. Daws
Daws Engineering, LLC

Ph.D.

About

7
Publications
533
Reads
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8
Citations

Publications

Publications (7)
Conference Paper
Nitrogen as an inflation gas for passenger car and light truck tires use is widely available commercially. Consumers are confronted with a bewildering selection of offerings, and suppliers tout the purity of their nitrogen generation systems and effectiveness of using the gas in place of air. This paper develops models for the initial tire nitrogen...
Conference Paper
One of the most important parameters to be established for tire operation, whether on a new vehicle being designed by a vehicle manufacturer or on a plus-size fitment, is the recommended cold inflation pressure for the tire. The tire carries a maximum inflation pressure label, but operation at lower loads and pressures is generally beneficial for o...
Article
Plus-sizing in the tire industry is the growing practice of replacing a vehicle’s original equipment wheel size with a larger diameter wheel and replacing the tire with a lower aspect ratio tire of the same diameter. This practice is normally associated with aftermarket sales, and there is a growing trend for vehicle dealerships to fit these larger...
Conference Paper
The present analysis uses data on irregular wear over artificially-created tread separations presented in ITEC 2004 [1]. These data are separated into groups by tire inflation pressure. It was found that tires inflated to full inflation pressure had irregular tread wear over the separation that varied exponentially as the size of the separation. A...
Article
Belt-leaving-belt tread separations in radial tires have been pointed out as a cause of vehicle accidents. This paper presents the results of measurements on the level of forces generated during a tread delamination. This study showed that tires that had been cut to generate a belt-leaving-belt separation always generated a leading edge flap and th...
Article
In-service catastrophic radial tire failure is often a separation of the tread and outer steel belt from the tire casing and inner steel belt. These separations generally occur in the field at high temperature and high speed. This paper presents a catalog of surface characteristics that define the various types of rubber cracking that takes place d...
Conference Paper
In-service catastrophic radial tire failure is often a separation of the tread and outer steel belt from the tire casing and inner steel belt. These separations generally occur in the field at high temperature and high speed. In this study, tire belt-leaving-belt failures were created on a flat-track machine at high speed. The actual separations we...