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Thanks Tom and Brad, My purpose is to calculate the dynamic stiffness and the cyclic stress,and then predict the life of the products by FEA. I have the same opinion,a good software and a good material input are the key of the dynamic analysis.I think both ABAQUS and MARC are suitable for...

Dear rnd2,I completely agree with your opinion. The material selection,the fibre direction and the shape of the overall shape are all important factors for the air spring design. Presently I am looking for a kind of fiber with slim size and high modulus and stable with a varied temperature...

Dear rnd2, Thanks for your imformation. What do you think about those materials? If it's applied in air spring,do you think which one is better,considering both the performance and the costs? Thanks. Have a nice day.

Thanks Tom. I read the previous posts,and I know you are the expert in rubber field.So maybe I could learn a lot from you. Presently I have am using ABAQUS,and also get some imformaton from the support.It's said the hyperelastic property as well as the viscoelastic property should be defined...

Dear rnd2,Thanks for your help. For I am not familar with the materials,could you tell me where can I find the machanial property with PET and PP fiber? Thanks

Hello,everyone I am looking for the reinforcement material in rubber matrix.As far as I know,nylon66 is the widely used material in tyre and air spring,but it's not very ideal for the unstability with tempreture.It's said Kevlar is very good but very expensive. Could anyone give me some...

Hello,everyone. I have a question on the calculation of rubber dynamic stiffness. Presently I am doing FEA by ABAQUS,but it's mainly for static analysis,now I have to do some work for the dynamic stiffness for rubber mountings,for it's the working stiffness. My question is what's the material...

I think ANSYS or ABAQUS would play this role.If it's ANSYS,solid46 element will allow you set the ply angle.the orthotropic material setting is not a problem in ANSYS.If you use ABAQUS,I suggest you read the example documentation,there is a very detailed example on the composite material as you...

Hi, I am trying to do an analysis on the dynamic stiffness of rubber with ANSYS.The model is a bushing under a cyclic load with a specified frequency,and the material damp is been considered.The loading condition simulated the testing process,but I couldn't get the hysteresis loop as the...

Thanks ElastomerXpert. I have got the hysteresis loop by testing,but not with Finite Element Analysis in the computer.I did the simulation by ANSYS,and defined damp to extremely large,and strain is also not small,and the results are not linear with a very small circuitous curve.I couldn't...

corus Thanks for your suggestion.Yes,we have both ANSYS and ABAQUS,but I don't think it's a waste of money to buy two characteristic software.Each of them have the advantages and disadvantages.With the combined advantages,we could solve all kinds of problem. Personally,I prefer to the...

Hi, I am trying to do a FEA for dynamic stiffness of rubber.My model object is a bushing under a cyclic load with a specified frequency,and the material damp is been considered,but I couldn't get the hysteresis loop.why? Thanks.

Hello,everyone I am very happy to join this forum,and I am hoping to get more help from you and help you also. Here I have a problem about the elastic modulus of nylon6.I have done some test to measure the elastic modulus,but the results have a big difference from the value in a paper.I...

Personally,I prefer to use ANSYS pre/post processor for it's convinence.so it's great to build the model and view the result in ANSYS and calculate with ABAQUS.Does it seem too unrealistic?

Hello,everyone I am analysing the static character of airspring with ANSYS and ABAQUS,the job is exhausting while the result is not satisfying.so I am looking for a more professional software to solve this problem more efficient and accurate. I will very appreciate if anyone could give me some...

Hello,everyone I am analysing the static character of airspring with ANSYS and ABAQUS,the job is exhausting while the result is not satisfying.so I am looking for a more professional software to solve this problem more efficient and accurate. I will very appreciate if anyone could give me some...

Hi,I have a question on the relation of hardness and elastic modulus,I had ever got the idea from somewhere that the mechnical property of rubber is determined by the hardness,and now I am doubt about it.Do you agree the idea that same hardness with different compounds would share the same...