Fatigue, yield & fracture criterion for fibre reinforced plastics in comparison to metal
Fatigue, yield & fracture criterion for fibre reinforced plastics in comparison to metal
(OP)
Hello All,
I would like to request from the interested folks, if anyone can suggest me fibre reinforced plastic CAE. I would like to know following;
-To predict fracture in Plastic, which theory we need to follow, max principal strain or max von Mises strain?
- Can we define a clear Yield strain (proof strain) for FRP? if it is, then what should be plastic strain?
- For fatigue, should we take linear stress or do a nonlinear analysis, may be at high operating temp E value may not be appropriate for the given load. Can we take stress criterion ( a factor of UTS) if we don't fatigue data? Which stress combination we need to take? Principal or von Mises?
Appreciate if I can get answers with theoritical backing. Thanks to everyone!
I would like to request from the interested folks, if anyone can suggest me fibre reinforced plastic CAE. I would like to know following;
-To predict fracture in Plastic, which theory we need to follow, max principal strain or max von Mises strain?
- Can we define a clear Yield strain (proof strain) for FRP? if it is, then what should be plastic strain?
- For fatigue, should we take linear stress or do a nonlinear analysis, may be at high operating temp E value may not be appropriate for the given load. Can we take stress criterion ( a factor of UTS) if we don't fatigue data? Which stress combination we need to take? Principal or von Mises?
Appreciate if I can get answers with theoritical backing. Thanks to everyone!






RE: Fatigue, yield & fracture criterion for fibre reinforced plastics in comparison to metal
RE: Fatigue, yield & fracture criterion for fibre reinforced plastics in comparison to metal
For continuous fiber reinforced plastics, stress-strain is usually linear to failure, the is no "yield" and neither max prin or Von mises criteria are appropriate; need to use something like max stress or strain in the fiber directions (and ignore most of the failure criteria stuff in text books - it is wrong)
RE: Fatigue, yield & fracture criterion for fibre reinforced plastics in comparison to metal
RE: Fatigue, yield & fracture criterion for fibre reinforced plastics in comparison to metal
RE: Fatigue, yield & fracture criterion for fibre reinforced plastics in comparison to metal