yaning
2007-04-12, 22:52
Hello everybody,
First, I would like to say it's a terrific forum and I learned a lot here hope I can contribute to it as well later, not now :(
I am writing vumat for the spring dashpot model (linear elastic+visoplastic &rubber elastic). And then run it for unit element compression. Only the first step runs repeatly. And get the warning deformation speed is larger than wave speed.
The maxdt =1e-5
The default bulk viscosity is used 0.06(linear) and 1.2(quadratic)
Then I remember somewhere in the forum said: Explicit can't use for incompressible model, could it be the reason of the trouble I met? If so, what should I do to make it works.
However, I tried the build in Arruda-boyce model with D=0 using explicit, results are obtained without trouble. Does it mean explicit CAN use incompressible model :? ?
Many Thanks!
yaning
First, I would like to say it's a terrific forum and I learned a lot here hope I can contribute to it as well later, not now :(
I am writing vumat for the spring dashpot model (linear elastic+visoplastic &rubber elastic). And then run it for unit element compression. Only the first step runs repeatly. And get the warning deformation speed is larger than wave speed.
The maxdt =1e-5
The default bulk viscosity is used 0.06(linear) and 1.2(quadratic)
Then I remember somewhere in the forum said: Explicit can't use for incompressible model, could it be the reason of the trouble I met? If so, what should I do to make it works.
However, I tried the build in Arruda-boyce model with D=0 using explicit, results are obtained without trouble. Does it mean explicit CAN use incompressible model :? ?
Many Thanks!
yaning