coefficient of friction

[Jeffcott]

Hello everyone,
I am looking for friction coefficient for polyvinyl chloride (pvc) on a plane made of polyurethane. Perhaps someone has already associated these two materials but it is difficult for me to find this coefficient. I hope you can help me.

Thank you!

pierluigi

 

[Exatem]

I don't remember if there are your materials but try to look here:http://www.tecnocentro.it/ita/tabella_coeff_attrito.htm

 

[Jeffcott]

I had already found this site exatem but unfortunately there is nothing to do to my case, thanks anyway for your interest.

 

[Exatem]

another site I can tell you is this:http://www.dunagroup.com/default.aspMaybe there's no data you need but you can try sending him an email.

 

[Jeffcott]

Thanks again, I'll contact them... hoping for their exhaustive answer!

 

[meccanicamg]

as I have already written in a post, it is necessary to make simulation on a tilted plane and calculate real coefficient of materials.

 

[Jeffcott]

as suggested by exatem I contacted some pvc producers who, however, could not answer my question... They write: "...the polyurethane you speak of should be like "coating", "gommine" or "plastichine, if so we would fall into a range of products that is not our competence, that of compact polyurethanes. we are producers of rigid polyurethane foam, which looks like a rigid and dusty sponge, with functions predominantly of thermal insulation..." they do not have any dact on it. I then looked for other sources that led me to a coefficient of 0.02, does it seem plausible?

 

[Jeffcott]

I think I just consider 0.4 which coefficient of friction for polyvinyl chloride, is what obtained with a simulation on a sloping plane, as suggested by mechanicsmg.

 

[meccanicamg]

I think I just consider 0.4 which coefficient of friction for polyvinyl chloride, is what obtained with a simulation on a sloping plane, as suggested by mechanicsmg.

see:finger: if you ask producers never know anything... we always have to arrange. Sometimes it's really the best thing. they sell but they do not know what they sell. we need the application, so we experience it. :finger:

 

[Exatem]

see:finger: if you ask producers never know anything... we always have to arrange. Sometimes it's really the best thing. they sell but they do not know what they sell. we need the application, so we experience it. :finger:

Unfortunately it is true. I'm too optimistic! :frown:

 

[desMoira]

I would say that 0.4 is already more likely, 0.02 does not make sense.

And I still play with the tribometers... :

 

[paolino]

as I have already written in a post, it is necessary to make simulation on a tilted plane and calculate real coefficient of materials.

It is the best thing, also because (if you have the possibility) you can reconstruct the same operating conditions that you will need: surface finish especially, lubrication, temperature, speed, specific pressure.
always admitted that a great accuracy of the data is important...
Hi.

 

[Jeffcott]

...but getting me first all the various factors that are not available in the catalog just slows me terribly in the design phase. . .

 

[meccanicamg]

...but getting me first all the various factors that are not available in the catalog just slows me terribly in the design phase. . .

it is enough to make open design, that is to make a draft of what is needed and above all to create children of calculation on what is planned, we assume the values and we get to a result.

then you do the experimental tests to recover the info that are missing, compare them with the sheet and if you have been predicted and prudent you leave as it was otherwise you change:finger:

 

[Jeffcott]

:biggrin: ...and already! thanks mechanicmg, you always have a ready answer:smile:.

 

[meccanicamg]

:biggrin: ...and already! thanks mechanicmg, you always have a ready answer:smile:.

modestly... in my little one I have to arrange. the first times is panic, then slowly passes and you learn to manage situations with more security:biggrin:

 

[Guido]

How do you calculate friction coeff through experimental tests on an inclined plane?

Thank you.
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