What do you mean by ozone test, Civil Engineering

Assignment Help:

Q. What do you mean by Ozone Test?

Some research and studies determined that the ozone test was unnecessary as this affects only the surface layer.  In un-stretched rubber, ozone degradation is confined to a thin surface layer, typically 0.5  µ. Ozone cracks develop at right angles to the tensile strain and they degrade rubber's tensile strength and may also initiate fatigue growth that ultimately leads to failure of rubber products.  Because cracks only occur in regions where tensile stresses are induced, they are unable to penetrate very far into objects, which are under compression.  In bearings, the growth of cracks ceases close to the surface because cracks quickly encounter compressive rather than tensile stresses. Therefore, it has been contended that ozone damage is a serious concern in thin-walled products, but not in those bulky products like bearings. Contrarily there is a harmful effect because the manufacturers use anti ozanant waxes to protect against ozone attack.  This viscous layer of wax is responsible for a significant number of serious slipping problems where the bearings 'walked-out' of the support area.


Related Discussions:- What do you mean by ozone test

Average heating season outside temperature, Produce a manual determination ...

Produce a manual determination to determine the instantaneous rate of heat loss (kW) through one part of the fabric (eg roof, glazed area, wall) based on an internal building desig

Conventional incineration and refuse-derived fuel facilities, Explain the C...

Explain the Conventional Incineration and Refuse-Derived Fuel Facilities? 1. Conventional (Mass-Fired) Incineration most common form of municipal solid waste (MSW) incin

State the coulomb earth pressure theory, A masonry wall with vertical back ...

A masonry wall with vertical back has a backfill 5 m behind it. The ground level is horizontal at the top and the ground water table is at ground level. Measured the horizontal pre

What do you mean by elastomeric bearings, Q. What do you mean by Elastomeri...

Q. What do you mean by Elastomeric bearings? Steel bearings are good but suffer from problems of corrosion and high level of maintenance. Due to these problems of steel bearing

Define drag load test of shock transmission unit, Define Drag load test of ...

Define Drag load test of shock transmission unit? This test ensures that excessive load should not be transmitted to the structure by the STU. As per the test the STU shall hav

Survey, how can I use reciprocal type of leveng method to level a ground, a...

how can I use reciprocal type of leveng method to level a ground, and a procedure

Concrete, What practical steps can one take to mitigate the adverse effects...

What practical steps can one take to mitigate the adverse effects in using aggregates with higher than specified flakiness index in the production of concrete

Length is constructed in first phase of construction, In construction of a ...

In construction of a two-span bridge (span length = L) by using span-by-span construction, why is the length of about 1.25L bridge segment is constructed in first phase of construc

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd