force to penetrate of slip teeth into pipe wall
force to penetrate of slip teeth into pipe wall
(OP)
I need to calculate the force required to indent slip teeth into pipe od to a given depth of a few thousandths of an inch (variable). It is a plastic-flow problem that so far eludes me. The teeth are much harder than the pipe and the pipe is ductile steel. Strain hardening need not be considered. Can anyone suggest a good way to calculate this force?
DowneastTech
Mechanical Engineer
Magnus R & D, Cypress, TX
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RE: force to penetrate of slip teeth into pipe wall
My experience is that you don't have much choice here. The problem is that there is no closed form solution for plastic deformation. I would suggest that you perform a finite element analysis with elastic perfectly plastic material properties. If the strains do not exceed 5% then the elstic perfectly plastic analysis will be accurate. If the strains are much higher, then the accuracy will suffer. Beyond 10% strain, you will need to develope a true-stress true strain material model to get an accurate force. Good luck.
cab1990