I am investigating the vibration properties of unidirectional composite materials using ABAQUS. My aim is to compare the damping behavior in both the longitudinal and transverse directions. However, my current results show unrealistic behavior: the oscillations decrease at first and then start increasing, which is non-physical.
I suspect that the issue lies in the setup of the boundary conditions, or step definition. The model was subjected to a 1% strain along its length, then released abruptly to observe free vibration.
What I aim to achieve:
1. Faster amplitude decay when damping is added.
2. Higher frequency and smaller amplitude in the longitudinal direction(parallel to the fiber).
3. Lower frequency and larger amplitude in the transverse direction.
The figures below describe the steps I followed in setting up the simulation. Any suggestions to resolve this issue?
Thank you in advance for your help.
I suspect that the issue lies in the setup of the boundary conditions, or step definition. The model was subjected to a 1% strain along its length, then released abruptly to observe free vibration.
What I aim to achieve:
1. Faster amplitude decay when damping is added.
2. Higher frequency and smaller amplitude in the longitudinal direction(parallel to the fiber).
3. Lower frequency and larger amplitude in the transverse direction.
The figures below describe the steps I followed in setting up the simulation. Any suggestions to resolve this issue?
Thank you in advance for your help.
