Welcome to the forum Geek, lovely to have you. This is the carer's forum, formerly called the spouse forum, so you are now in the correct place (thank you Veiled).
Are you still with him, even though he has become violent? Was it just a one time affair or something that's happening often? Honestly, if he is continuing to be violent, my advice is to separate, for your own safety. That is not to say you still cannot support him and so on, but you needn't put yourself in danger at the same time. You must think of yourself as well, you are important too.
My husband and I have been married almost 36 years, so I well understand the bond that develops from being together so long, and the devastation you must feel at the changes in him. How long has he had PTSD? Please feel free to share more whenever you are ready, members here are interested and care.
In the meantime, we have a carers information section with many helpful articles and suggestions, perhaps you would like to read in there if you do not yet feel comfortable sharing:
[DLMURL]http://www.ptsdforum.org/forum43.html[/DLMURL]
Do take care!