I quickly looked through the Abaqus documentation and I did not see separate outputs for bending and axial loading. Hmm, perhaps I missed it but it does not seem easy to separate the two.
Perhaps you could run your simulation using truss elements, which only take axial loads. From that simulation you might be able to estimate how much energy is stored in axial loading...
The difference between the beam and the truss elements might indicate the amount of energy stored in bending
Jorgen Bergstrom, Ph.D.