1. What is the Precise definition of SIF's..?
2. Whats the difference between SIF's and "flexibility factor".?
3. What is the difference between In plane SIF's and out plane SIF's?
3. What is the exact reason that flexibility increases in system with addition of bends ..?
Stress Intensification factors
Re: Stress Intensification factors
A1-Stress intensification factors are the percentage of correctness in calculating the BENDING STRESSES generated by loads and pipe movements. They are experimental values with some modifications etc etc..long long story WRC also has a Paper on that. Check it out.
A2-SIF is the correction in bending stresses as mentioned above and flexibility factor is the extracted formulas from these experimental results which are dependent on pipe fitting dimention and type used.
A3-In plane means: assume a flexible ball being pressed from above (at bottom it is rested on stiff ground). The deformed shape will generate in plane SIF.
Out plane means: assume a flexible ball being pressed from left and right by your hands (while resting on ground). The deformed shape will generate out plane SIF.
(in other words ovalty due bending forces in pipe fittings in both vertical and horizontal directions becomes in/out plane SIFs)
A4- Bends do take alot of deformation in order to distribute the high stresses that is why stresses are reduced when number of bends increases in Piping layouts.
Hope that helps ...
Regards,
Salz
A2-SIF is the correction in bending stresses as mentioned above and flexibility factor is the extracted formulas from these experimental results which are dependent on pipe fitting dimention and type used.
A3-In plane means: assume a flexible ball being pressed from above (at bottom it is rested on stiff ground). The deformed shape will generate in plane SIF.
Out plane means: assume a flexible ball being pressed from left and right by your hands (while resting on ground). The deformed shape will generate out plane SIF.
(in other words ovalty due bending forces in pipe fittings in both vertical and horizontal directions becomes in/out plane SIFs)
A4- Bends do take alot of deformation in order to distribute the high stresses that is why stresses are reduced when number of bends increases in Piping layouts.
Hope that helps ...
Regards,
Salz