libreria ansys - data source - pa 66 + 30gf - metal replacement

[Andrju84]

Bye to all,
I wanted to know if there is someone who has ever worked with a polyamide 6,6 (nylon 66) reinforced with glass fiber and if you can direct me to the characterization of the material in ansys.
I am looking on the internet if there are material libraries to load, unfortunately I am not finding anything even if the material in question is widespread in the field of "metal replacement".

Thank you very much

 

[volaff]

in ansys the material you have to "model" you will never find a library for ansys

 

[Andrju84]

in ansys the material you have to "model" you will never find a library for ansys

Thank you for answering me,
I hoped to start from a well-known library and then change the features in my possession. . .
I would have wanted to understand how to consider some aspects "since the reinforcement is present inside" so as to understand the parameters of which mathematical models had been chosen to characterize the material at best for the purposes of analysis. .

 

[volaff]

if it is a composite material you can model it layered

 

[Andrju84]

if it is a composite material you can model it layered

In this case I can't, because the manufacturing technique is that of injection in mold, so the material is present in random form inside the pellets... So I think that I just have to consider the mechanical characteristics of the material in question already loaded, without worrying about its composition. Among other things, this leads me to consider it isotropic... Unfortunately, there are many people working on these things, but then in the thesis I found, they don't talk at all about how they considered the material. . .
in fact it would have been very precious to know how it was considered by someone who has already worked with us. .
cmq thank you very much for the collaboration

 

[stefano.garbin]

some advice, based on experience:
-go on isotropic material, and if the application allows you, use a linear model (for a gf30 the module of poisson can be worth 0.38 - 0.4 approximately)
- if efforts and deformations are high the hypothesis of material decays. However, the yielding mechanisms of these polymers are not as well known as those of metal materials. if your application does not have load-loading cycles you can in first approximation use a model for metal materials (bilinear isotropic hardening, bilinear kinematic hardening, multilinear isotropic hardening, multilinear kinematic hardening)
-if there are load/unload cycles the above models decay and you can try a hyperelastic model (better a simple as the neo-hookean)

if you need data on materials you find a tide of stuff up www.campusplastics.com

 

[Andrju84]

some advice, based on experience:
-go on isotropic material, and if the application allows you, use a linear model (for a gf30 the module of poisson can be worth 0.38 - 0.4 approximately)
- if efforts and deformations are high the hypothesis of material decays. However, the yielding mechanisms of these polymers are not as well known as those of metal materials. if your application does not have load-loading cycles you can in first approximation use a model for metal materials (bilinear isotropic hardening, bilinear kinematic hardening, multilinear isotropic hardening, multilinear kinematic hardening)
-if there are load/unload cycles the above models decay and you can try a hyperelastic model (better a simple as the neo-hookean)

if you need data on materials you find a tide of stuff up www.campusplastics.com

Thank you very much
you feel that you have experience about it...

 

[Cla]

Sorry I reexhumed a discussion of many years ago, I have a similar problem ... I have a particular of which I made the injection molding simulation with Moldovaex, through an extension I managed to import in ansys (wb) a meshatura that also takes into account the distribution of the fibers and made the structural calculation (2 cases, one of material not loaded in pa66 and another case of material loaded pa66 gf30). considering that it is a static analysis (considered it affects the load history) the problem is now understand .... is the particular subject to yielding? is it subject to rupture? ?

I make it difficult to find data about yielding and breaking load for both pa66 and pa66 gf30.

for the material loaded the technical card (I have looked at several) reports only the breaking load, possible that the reason is that being a composite material it is not possible to identify a real yield?

similar discourse for pa66, but on the contrary ... I find only the yielding load but not the breaking... possible is due to the fact that the strition is too accentuated??? ... maybe someone had something to do with these issues? ? ?

Thank you.

 

[Cla]

I thought I would refer to equivalent deformations to hypothesize behavior and make a comparison