This is way beyond the scope of divorce busting, drinking STFU smoothies or eating sh!t sandwiches.
Physical abuse is never, never, NEVER okay. What he did is illegal and punishable by law.
Get out of there. There is nothing to work with here. Get yourself some counseling to work though it.
You did nothing wrong. But you need to get out of there.
Me 41, H 47, M 15 yrs, S11, S13 BD 1: 11/4/14 we work on it; really I pretzel myself BD 2: 3/31/15 H goes down to "dorm room" 8/15: H back to MBR 10/15: H back in dorm room 1/18: H files, now divorced