cancel
Showing results for 
Search instead for 
Did you mean: 

Durability wizard

Creator
Creator

I am trying to perform a durability analysis, however i did not understand one thing, when i go to the durablity wizard and change the number of cycles or scale factor for the simulation, the results does not change. 

 

like the safety factor, and maximum cyclies of life for yield, and strengh keep the same, someone know what i am doing wrong.

 

Thanks a lot.

 

Sincerely.

 

HJA

4 REPLIES

Re: Durability wizard

Solution Partner Legend Solution Partner Legend
Solution Partner Legend

Halipio,

 

What is the maximum stress from your static simulation?

 

What material are you using?

 

Phil


Philippe Tremblay
phillippe.tremblay.ext@siemens.com
www.mayahtt.com

Re: Durability wizard

Creator
Creator

copper the maximum stress nodal stress is around 37 MPA

Re: Durability wizard

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

Dear Halipio,

I am discussing a similar problem with SIEMENS people and I hope to receive an answer soon.

Best regards,

Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/

Re: Durability wizard

Solution Partner Legend Solution Partner Legend
Solution Partner Legend

Halipio,

 

The strength safety factor is independent of the number of load cycles, as it compares the yield or ultimate strength of the material, to the max stress in the part.

 

The fatigue safety factor does not consider the load cycles, but rather the number of reversals you define in the fatigure safety factor tab. Did you change this as well as the niumber of load cycles?

 

02-Jul-15 10-53-31 AM.png

 

Finally, you mention the maximum life not changing. Generally if you have a part with low stress and which could be below the stress corresponding to inifinite life, then the maximum life won't change with the number of load cycles. The minimum life will change, and I assume it has in your case.

 

Let me know if you have any further questions,

 

Phil


Philippe Tremblay
phillippe.tremblay.ext@siemens.com
www.mayahtt.com