Dave_Holmes
2006-10-15, 18:54
Hi all
Is anyone able to recomend literature that deals with the time dependence of rubber at high strain rates. Alternatively, an idea of a suitable constitutive theory or currently implemented material model would also be helpful. I suppose the greatest requirements are:
-rate/time dependence of transient loading
-post event relaxation mechanisms
-unloading and recovery (high or low rate)
The high degree of geometric nonlinearity of the problem means that many different mechanisms could be occuring simultaneously and so a relatively robust theory with good extrapolation or interpolation between actually tested ranges of loading would be ideal. Unfortunately I think the flying pigs are keeping such theories to themselves but a good thermodynamically based theory with solid theoretical account of time dependence should do the job.
I have my own Elasto-viscoelastic-viscoplastic UMATs operating and robust for my current applications however to date I've only been dealing with quasi-static situations and I've been posed the problem of dynamic impact of rubber buffers. Any help would be very much appreciated.
David
Is anyone able to recomend literature that deals with the time dependence of rubber at high strain rates. Alternatively, an idea of a suitable constitutive theory or currently implemented material model would also be helpful. I suppose the greatest requirements are:
-rate/time dependence of transient loading
-post event relaxation mechanisms
-unloading and recovery (high or low rate)
The high degree of geometric nonlinearity of the problem means that many different mechanisms could be occuring simultaneously and so a relatively robust theory with good extrapolation or interpolation between actually tested ranges of loading would be ideal. Unfortunately I think the flying pigs are keeping such theories to themselves but a good thermodynamically based theory with solid theoretical account of time dependence should do the job.
I have my own Elasto-viscoelastic-viscoplastic UMATs operating and robust for my current applications however to date I've only been dealing with quasi-static situations and I've been posed the problem of dynamic impact of rubber buffers. Any help would be very much appreciated.
David