I have a 2D rectangular workpiece and I load it such that cracks are generated. I studied its stress, strain and crack behaviors for that loading condition using Abaqus CAE. All geometries are 2D.

For the above workpiece, with the same material behavior and loading conditions, I aim to know the acoustic energy generated when the crack propagates through the rectangle. Specifically, I am interested in finding the amplitude of the sound waves generated, as the crack propagates through the workpiece. My questions are as follows:

1. Should I define an acoustic medium around the workpiece (air with 'acoustic infinite' section), with bulk viscosity properties to capture the amplitude of the acoustic energy? If so, I had difficulty assigning 'acoustic infinite' section to a 2D geometry which was to be the air medium. Is there a way around this, or do I have to model everything in 3D?

2. If the acoustic medium is not required, then I believe my problem is with the output requests. I see that there is only 'acoustic pressure' and 'acoustic absolute pressure' available in the field output requests. Is there a way to request acoustic amplitude or acoustic energy dissipation as output?

I appreciate any help or suggestions in this regard. Please let me know if anything in the problem description is unclear of if additional information is required.

Thank you