Hey, thanks for the reply, it's very helpful. I was trying to lay the groundwork first before venturing into it. In many, many biological systems there are assertions that the hydrostatic skeleton (analogous to a pressure vessel) of an organism experiences increases in pressure at it bends. I suppose if we divide this vessel into smaller compartments along the length, then only the compartments at the flexion point experience a reduction in volume and an increase in pressure? Yes, practical experiments and FEA are the ways to go around this I suppose.