SimScale CAE Forum

Converting creep parameters

Hello,

I want to define creep using Bailey-Norton law. I found material parameters in literature for the parameter A given in units MPa^(-n) s^(-m-1). Could you please help me how to convert the given value for A to the SI units? The values are shown in the attached figure.

Kind regards
Asim

Hi Asim!

Have not worked through the paper but it seems like equation 6 in this paper might help: https://pdfs.semanticscholar.org/ff5a/4c4baa2d07371547e4ffc4e7f7ba22dc1cd3.pdf - also when using the powerlaw for \dot{\epsilon} you can use a reference stress to make A non-dimensional which gives you something that is in SI units. Maybe someone else can add some more thoughts here :slight_smile: Let me know if my impetus helped here.

Best,

Jousef

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Hi @aaasimm
Have a look at this, is this the same you are asking for.

Regards

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Thanks Hamza! Yes I was looking for this.

@jousefm The paper seems interesting. Certainly, I will go through it.

Thanks for your prompt responses.

Kind regards
Asim

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I think the key is to know the units of A. For Strain hardening case, the units of A are as shown below.

units