topic Re: definition of material in Analysis

definition of material

AS_8634671 — Mon, 08 May 2023 07:22:49 GMT

Can someone please help and tell me how to calculate or find the values of " exponent " here (attached) ??

Thanks a lot ...

Re: definition of material

skunks — Mon, 08 May 2023 08:11:22 GMT

Re: definition of material

AS_8634671 — Mon, 08 May 2023 10:48:01 GMT

Thank you very much for your example but i really don't understand how you found this value. it is obtained automatically? how do you fill in this table ?

Thanks a lot...

Re: definition of material

skunks — Mon, 08 May 2023 11:32:51 GMT

example: 10.9

Re: definition of material

AS_8634671 — Thu, 11 May 2023 06:25:07 GMT

I have once again a problem with the definition of the material for my simulation with CREO... I obtained as Max stress 1500MPs which is in this case the tensile Strength because my simulation is non-Lineare.

I defined my material as follows but i don't get the desired result... can you help me in this case (Attached) ? The Tensile Yield Stress is 900Mpa

Thanks a lot...

Re: definition of material

skunks — Thu, 11 May 2023 08:19:06 GMT

What is the elongation at break? You have a high stress value at 3% elongation, is the material brittle?

Re: definition of material

AS_8634671 — Thu, 11 May 2023 08:50:55 GMT

the material is ductile. the high stress value at approximately 9% elongation

Re: definition of material

skunks — Thu, 11 May 2023 09:12:07 GMT

my example att.

Re: definition of material

AS_8634671 — Thu, 11 May 2023 10:59:19 GMT

Thank you for the example...

one more question: namely_: can the hardening limit be greater than the tensile yield point? Can you please briefly explain to me what the hardening limit is? is there any literature you can recommend me?

Thanks a lot....

Translated by the Community Moderation using Google Translate
-----------------------------------------------------------------------------------------------

Vielen Dank dank für das Beispiel...

noch eine Frage: und zwar_: kann die Verfestigungsgrenzwert größer sein als der Zug-Streckgrenze ? Können Sie mir bitte kurz erklären, was die Verfestigungsgrenzwert ist? gibt es eine Literatur, die Sie mir empfehlen können ?

thanks a lot....

Re: definition of material

skunks — Thu, 11 May 2023 10:56:16 GMT

https://nbn-resolving.org/urn:nbn:de:bsz:ch1-qucosa-87141

Re: definition of material

skunks — Thu, 11 May 2023 11:01:56 GMT

normally the strain hardening value is equal to the tensile strength value, for very ductile materials (->50% elongation at break). But in this case the elongation at fracture is 9%, so the calculated curve would not be optimal, for this reason in my example the strain hardening value is slightly higher than the tensile strength, but at about 9% about 1500 MPa is applicable.

Re: definition of material

AS_8634671 — Thu, 11 May 2023 13:19:42 GMT

Do you think there is an explanation why my tensile strength is 2421 MPa (attached), although I entered the same information here? do you know what the problem could be? the tensile strength here should add up to 900 + 690.529 = 1590 Mpa or ?

Thanks so much

Translated by the Community Moderation using Google Translate
-----------------------------------------------------------------------------------------------

Glauben Sie es gibt eine Erklärung, warum die zugfestigkeit bei mir auf 2421 MPa liegt (attached), obwohl ich hier die Gleiche Infos eingegeben habe ? wiessen Sie woran das Problem liegen kann ? die Zugfestigkeit hier sollte die Summe auf 900 + 690,529 = 1590 Mpa oder ?

vielen lieben Dank 🙂

Re: definition of material

SweetPeasHub — Thu, 11 May 2023 13:14:39 GMT

Usually this data is from real testing like ISO 6892-1.,

Also , best fit can be done for multiple sample tests or runs.

Re: definition of material

skunks — Thu, 11 May 2023 13:25:50 GMT

You are right. The questioner only uses the yield strength and the tensile strength and the elongation at break. The value in between is selected, but the software seems to produce an error: