I wonder if Caesar has Incorporated stress range factor as shown in B31.3 2008 fig 302.3.5 or equation 1C.

The only option to input # of cycles in my version of Caesar (5.0) is to use fatigue load case. And I will have to input
a table of allowable stress with respect to # of cycles. My question is since we use liberal stress option, the
displacement stress will be local (not constant , change place by place), is it correct the way Caesar handles it ?

BTW, I did not find a place to directly use Stress range factor or to input cycle # to calculate the factor.

Did I missing sth?

No, this is not true.

While in the input, put the cursor in the "f" field of the "Allowable Stress" dialog and push [F1]. Read the "help" under the B31.3 section, you'll find you can put the number of cycles here if desired.

Alternatively, in the "Static Load Case" Editor, you can click on the [Load Cycles] button and specify the number of cycles on a "per load case" basis - which is actually a preferrable way to address this.

Thanks, rich.

I tied 2nd approach. However I get MINIMUM ALLOWABLE CYCLES 0 in the cumulative usage report.

I think I miss sth but can not find out.

Thanks.

Load case I used:
CASE 1 (OPE) W+T1+P1+F1
....

CASE 5 (SUS) W+P1

.....

CASE 11 (EXP) L11=L1-L5


CASE 12 (FAT) L11=L1-L5


When I input cycle number to the right of Case 12. I get MINIMUM ALLOWABLE CYCLES 0 in the cumulative usage report.


But if I input cycle number to the right of Case 11, it seems that I can the right allowable stress after the reduction factor.

That is because you called case 12 "fatigue", and you probably didn't setup any fatigue data back in the input. "FAT" is different from "EXP".

Thanks.