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

State the total rankine active thrust per metre run, A wall with a smooth v...

A wall with a smooth vertical back 9 m high ropes a purely cohesive soil with  c = 10 kN/m 2 and γ = 18 kN/m 3 . State the total Rankine active thrust per metre run, the positi

Determine about the pre-stressed concrete beam, Determine about the pre-str...

Determine about the pre-stressed concrete beam A pre-stressed concrete beam has a width of 200 mm and an overall depth of 400 mm. The permissible stresses in tension and compre

Rcc and rbc, types mixing,curing,water cement ratio,qualities and workabili...

types mixing,curing,water cement ratio,qualities and workability

Verify the total active thrust on the wall per lineal metre, A smooth backe...

A smooth backed vertical wall is 6.3 m high and retains a soil with a bulk unit weight of 18 kN/m 3 and φ = 18°. The top of the soil is level with the top of the wall and is horiz

Define fatigue load test of shock transmission unit, Define Fatigue load te...

Define Fatigue load test of shock transmission unit? This test was carried out for 100,000 cycles for maximum capacity of STU, assuming the worst case that the 'Lock Up Load' i

What is thermo-electric prestressing, What is Thermo-electric prestressing ...

What is Thermo-electric prestressing We know that, stretched tendons are used in prestressed concrete. Stretching of tendons may be accomplished by using jacks or by other mea

Cross drainage work, Cross Drainage Work: Several natural streams, ri...

Cross Drainage Work: Several natural streams, rivers and canals cross the road. They have to be led across the road through culverts and bridges. That given structures is kno

Process to calculate the initial tension, Process to calculate the Initial ...

Process to calculate the Initial Tension The maximum stress induced in the prestressing tendon at the time of the stressing operation is known as initial tension in tendons. T

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