Can you kick them both out? Or move out yourself?
Blaming the other member in a family fight is normal. Kicking them out will not solve problem, it may break up the family. If professional help is one of the option to settle the issue.
Families locked in physical combat isn't normal, and shouldn't be tolerated, even for a day. If they won't move out, I suggest she book herself a hotel at an extended stay for two weeks, and tell them to fend for themselves for two week, bye. I personally couldn't tolerate living in a home where my daughter and my husband (seems it's not the girl's father) were having physical fights, including the daughter assaulting her own self, and the mother's husband strangling the adult daughter.
If the husband is really strangling the daughter, whether she is frustrating or not, he is committing battery, and that is a crime. If it had been witnessed by someone besides the main parties in this story, he could have been arrested.
I'd say the daughter needs a mental-health evaluation and some work done on her meds or whatever she has had so far, it's clearly not working. If the husband knew this was coming, he might be able to muster some patience. If the wife can't get the child to go to mental-health help and can't get the husband to manage his frustration, I tend to agree with RockRose that she herself should get out of there for a break. Family member she can stay with? I realize she might come home and find that the two of them have torn up the house, but unless she feels like calling the police and getting her daughter committed and/or her husband arrested, perhaps it's better just to be gone for a while.