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

Enumerate the term - failure due to crushing of concrete, Enumerate the ter...

Enumerate the term - Failure Due to Crushing of Concrete Over reinforced pre-stressed concrete members, provided with a large amount of pre-stressing steel or relatively small

Beams, how to convert uniformly varying loads to point loads

how to convert uniformly varying loads to point loads

Mr Kamal Saxena, What is WBM road. How it is constructed?

What is WBM road. How it is constructed?

Hydraulics and Hydrology , A flow rate of 200 gpm of oil with u=1.5 x 10-3 ...

A flow rate of 200 gpm of oil with u=1.5 x 10-3 lb-sec/ft2 and p=1.7 slug/ft3 occurs in a 4-in pipe. Determine the Reynolds number. Classify the flow as laminar or turbulent. What

Define the term- erection stresses, Define the term- erection stresses ...

Define the term- erection stresses The creep loss due to live load stress, erection stresses and other stresses of short duration may be ignored. The loss of prestress due to

Project, I want to do project using ul design directory

I want to do project using ul design directory

Effective span, what do u mean by effective span and its derivation?

what do u mean by effective span and its derivation?

Analyse and evaluate lightning strikes, Carry out research to Analyse and E...

Carry out research to Analyse and Evaluate: a.   The potential problems that lightning strikes to an aircraft in flight could create. b.   How design features and maintenance

Surveying, define principles of survey

define principles of survey

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