Hi all!
I'm currently checking a subsea component (copper alloy UNS 63200) according to BPVC DIV.3 - Hydrostatic Test Criteria (KD-236). But, i'm a little confused by the wording, and was hoping someone could clarify the procedure or correct me:
My understanding so far:
1)Ideally elastic-plastic (nonstrain hardening)material model:
If i remember correctly, this is a simple linear curve up to yield and horizontal beyond the yield point.
3)Shall the horizontal part be stretched to epsilon_fracture? I've seen elsewhere that other elastic-plastic material models go beyond fracture, is this relevant here?
4)Load combination (from Table KD-230.4). Assuming test pressure is the only relevant load.
(1/Kut)*Pt = 1/0.95*(15ksi*1.25) = 19.74ksi --> Is this the load I check my model in FEA?
6) "The collapse loads shall be not less than load factors given in Table KD-230.4"
What exactly does this sentence mean? How is the collapse load obtained?
Any comments/corrections are highly appreciated!
Regards
SiggiN
I'm currently checking a subsea component (copper alloy UNS 63200) according to BPVC DIV.3 - Hydrostatic Test Criteria (KD-236). But, i'm a little confused by the wording, and was hoping someone could clarify the procedure or correct me:
My understanding so far:
1)Ideally elastic-plastic (nonstrain hardening)material model:
If i remember correctly, this is a simple linear curve up to yield and horizontal beyond the yield point.
3)Shall the horizontal part be stretched to epsilon_fracture? I've seen elsewhere that other elastic-plastic material models go beyond fracture, is this relevant here?
4)Load combination (from Table KD-230.4). Assuming test pressure is the only relevant load.
(1/Kut)*Pt = 1/0.95*(15ksi*1.25) = 19.74ksi --> Is this the load I check my model in FEA?
6) "The collapse loads shall be not less than load factors given in Table KD-230.4"
What exactly does this sentence mean? How is the collapse load obtained?
Any comments/corrections are highly appreciated!
Regards
SiggiN