Yes, you can get divorced without his consent. Although, he could drag it out. In Arizona, the only grounds for divorce is "irretrievable breakdown of the marriage." If he claims that he doesn't feel the marriage is irretrievably broken (meaning it can still be saved) then the judge can (and I think in AZ usually does) order some type of mediation/counseling. But, as long as you stick to your statement that the marriage is over, in the end, the judge will sign the divorce decree.
At any rate, if you're afraid that he could become violent, you might want to consider leaving before he gets served with the divorce papers.
http://www.supreme.state.az.us/dr/Text/Divorce.htm
My disclaimer--I AM NOT AN ATTORNEY