Firstly i think for the purpose of effectiveness, BDSM aspires to be safe sane and consensual. If your partner is regularly inflicting injury, i should think that behaviour falls outside the boundaries of common practice.

I'd also be concerned as to why you're willing to engage with something you don't state as being useful. You may not be able to work out an answer to this alone and so i wonder if a professional can help you decide whether your idea of BDSM is really appropriate? Good luck.