Corrugations . . . . you're going hate this

Yep, that's pretty straight forward …………

I think ……… :-)

Ermm? Thanks I think? LOL ;)

I did 5 lines and got confused!

ta


Graeme

Oh no not again....:)

The 2012 corrugation discussion

The 2009 version...

and 2006

just to name a few - I think there is a link in some of these to Doctor Karl's summary explanation which some may find easier reading.

Cheers
Greg

hi cocka
not only do horregations grind salt
they grind vehicles and people away
cheers

Naturally everyone knows that a corrugation is simply a physical manifestation of an underlying instability mechanism, a “relaxation oscillation,” caused essentially by stick-slip dynamics.

Elementary really ;-)

What absolute rubbish that PDF was and all the other theories.

Corrugations were invented by the Australian Dentist Association . They first used the stump jump plow to create them and rattle the fillings from your head. This created work. As time went by they used more sophisticated methods, such as graders. Instead of grading the roads they paid covert operators good money to rip them, which then had their income soaring as the corrugations increase the filling failure 10 fold.

All was going well until the advent of fluoride. When this came about the number of fillings drop off and the same could be said about their income. Bugger.

To counter this, they paid to have bigger and bigger loads placed on the roads and came up with the solid tyre saying it was an advance in technology that would negate the flat tyre. This now caused teeth to be ground down so they quickly moved their income source to false teeth and the removal of broken teeth.
Shortly after they realized the dental technicians were making more money than them and so a new tack was taken

So began the new scheme to generate income. This was in the form of lobbying for the removal of fluoride on the basis it is a poison. This political move has been a complete success. They quickly did it during the rein of Julia as they knew that Tony couldn’t or wouldn’t agree to anything. They tried, but always the same answer No.

Now the fillings are back on the agenda , They have decided to reduce the size of the corrugations as they have regained the standard of living they so richly deserved.

We can now rejoice that corrugations will decline from 2013 onwards.

For those who still find the corrugations to much,. Get something with a bit of horsepower and drag a 988 tyre behind you, if everyone did this we can defeat the corrugations caused by the ADA.

I don’t have to follow the above as all I do is drag my knuckles.

Newsflash. The panel beating association and the Society of Plastic surgeons have realised the potential of corrugations leading down to 1 lane bridges. Be warned.

These guys make some assumptions with which I disagree. I am pretty sure that corrugations are in fact started by the mechanism proposed by Relton ie the wheel pushes dirt, metal, bitumen ahead of it as it rolls along until the pile reaches a certain height and the wheel runs over the top of it. Once small corrugations have been formed I think the mechanism proposed by Mather starts to occur ie the wheel lands in the valley with sufficient force to break up the surface. They assume the wheel stays in contact with the road all the time - this isn't the case- I've seen wheels bounce into the air. The other effect that I propose is that when the wheel leaves the road it spins faster than the road speed, then, when it hits the ground again, it bites causing more surface damage. Same with braking but in reverse. This would explain why corrugations often seem worse in braking and acceleration zones.

As regards the mathematics- I'd rather see some experimental evidence with cars travelling at different speeds, with different loads, different tyre pressures, different spring and shocker setups.

Bob

Thanks all for a fine bit of fun. You all have a fine sense of humor. But to be serious I am sure that corrugations started to become worse with the advent of motors with DOUBLE OVERHEAD CAMSHAFTS.

OK, I'll agree with that......I think......maybe....not quite sure....

Cheers

D

Salt Grinder..... Scientists have known for years the truth how the universe started and evolution evolved but they has chosen to keep it quiet due to the anarchy, the collapse of modern society and millions of religious believers losing faith if it ever got out.

Scientists have also chosen the keep quiet on how and what causes road corrugations amongst the 4x4 world for the same reason....... the scientist could see if the truth got out on why and how they formed the 4x4 world would become a mess leading to widespread anarchy and many tears of disbelief that tyre pressures were not the cause.

For those that wish to keep abreast of this issue this articles puts sinusoidal and harmonic motion in simple pictorial terms: Harmonic vs Sinsoidal Motion