curve materiali

[SOLID]

Bye to all,
would you tell me where I can find the stress-deformation curves for an abs and a homopolymer pom?

 

[stef_design]

idem...anche per in metalli:finger:

 

[cacciatorino]

Bye to all,
would you tell me where I can find the stress-deformation curves for an abs and a homopolymer pom?

palstic materials are so widely variable that I think the only one is to ask the manufacturer with reference to the specific product.

say abs for example is very vague:

abs=acrylonitrile+butadiene+stirolo

but you don't know what percentage these components are, so it's hard to give general info.

 

[SOLID]

but you don't know what percentage these components are, so it's hard to give general info.

Hello hunter
the most relevant characteristics regarding these materials are
abs (reinforced in fiberglass)
- Volume mass: 1.02-1.05 g/cm^3
- rupture rate extension: 11%
- breaking load: 42 n/mm
-module elastic (23°c): 2050 n/mm^2

pom (omopolymer)
- Volume mass: 1.40 g/cm^3
- rupture rate extension: 45%
- breaking load: 71 n/mm
-module elastic (23°c): 3250 n/mm^2

These materials have the characteristic of having a non-linear elastic curve, so having only the elastic module at the beginning of the curve is not very helpful.
As for the percentage of the various components I do not know, I have only the physical and mechanical properties available.

 

[AMinati]

for materials according to specific technical standards (typically steels and metal materials in general) the reference technical standards report the mechanical characteristics at temperature for the field of interest. for example carbon steels according to 10028.3.

of these materials you have the guarantee that the products on the market meet those minimum mechanical characteristics (and you can contest the products if they do not meet the specific ones).
for all others you can find some indication of maximum and however even if you build in the laboratory the curve of the characteristics that interest you, this would only be valid for that specimen of material and it is not said that you can extend it to all the components of that material

hoping not to be too twisted

aminati

 

[SOLID]

for materials according to specific technical standards (typically steels and metal materials in general) the reference technical standards report the mechanical characteristics at temperature for the field of interest.

thank you for the aminati answer,
for the required standard the tests must be conducted according to ISO 527. but for me it does not matter the standard with which you have to test, (iso, en, astm,...) I only need to find curves that can approximate the characteristics of my materials in question.

I need these curves to perform a non-linear fem analysis of a mechanical component subject to high deformations.

 

[AMinati]

If the reference rules are available, you can create them for interpolating points, for example, for the pateriali p#######nh en10028.3 me are created for the elastic module and resistance according to the temperature. If, however, you need values in the field of high deformations I don't think you can find much! the only way is to carry out traction tests with all the limits mentioned in my previous post.

If the material you're interested in is weldable I would make a series of phone calls to all the laboratories in your area carrying out tests on materials. in the field of welding (of a certain importance) in fact you have to carry out numerous tests of traction, bending, resilience etc. If you're lucky you could find these tests already and from their recordings you could get as much as you need, maybe on a discreet number of samples.

aminati

 

[Santhià82]

hi to everyone is the first time I write on this forum!!!

solid, I hope you've already solved your problem, but if you don't, you can take a look at it. www.ides.com Find a lot of data on plastics and I also feel like traction curves.

There is also another even better site where you will surely find the curves of the materials of the main plastic manufacturers (e.g. dupont, ticona etc.) but I don't remember the link there is it in the office and unfortunately for you until 11-01 are at home! !

greetings

 

[stef_design]

hi to everyone is the first time I write on this forum!!!

solid, I hope you've already solved your problem, but if you don't, you can take a look at it. www.ides.com Find a lot of data on plastics and I also feel like traction curves.

I think the curves are paid by ideas.com? ? ?

 

[thor105]

Hello hunter
the most relevant characteristics regarding these materials are
abs (reinforced in fiberglass)
- Volume mass: 1.02-1.05 g/cm^3
- rupture rate extension: 11%
- breaking load: 42 n/mm
-module elastic (23°c): 2050 n/mm^2

pom (omopolymer)
- Volume mass: 1.40 g/cm^3
- rupture rate extension: 45%
- breaking load: 71 n/mm
-module elastic (23°c): 3250 n/mm^2

These materials have the characteristic of having a non-linear elastic curve, so having only the elastic module at the beginning of the curve is not very helpful.
As for the percentage of the various components I do not know, I have only the physical and mechanical properties available.

I fully share that said as a hunter. ask the manufacturer the curves related to the maternal.
I would say that among the important data, when talking about plastics, there is also water absorption.

p.s. is it possible to call the bulk mass with the simplest, and perhaps even more correct, term of density? Excuse the pedanteria :biggrin:

 

[SOLID]

solid, I hope you've already solved your problem

Unfortunately not yet...

but if it weren't you can take a look at www.ides.com Find a lot of data on plastics and I also feel like traction curves.

I also shot other sites (campusplasts, matweb, etc...) but I can't find the curves if I don't pay.

I fully share that said as a hunter. ask the manufacturer the curves related to the maternal.

done, but I still have no answer.

I would say that among the important data, when talking about plastics, there is also water absorption.

of course and beyond the porosity there are also other equally important ones (resistance to chemical agents, aging to atmospheric agents, resistance to light, temperature of softening, specific heat, thermal conductivity, color, gloss etc etc.) but that for the study that I have to conduct are not data of interest.

p.s. is it possible to call the bulk mass with the simplest, and perhaps even more correct, term of density? Excuse the pedanteria :biggrin:

volumical mass is a synonym for density, although technical regulations generally make use of the first term.