To file for divorce in Rhode Island, the one of the parties to the divorce action must have been lived in the state for one full year before filing the complaint. Active military servicemembers who lived in Rhode Island immediately prior to the commencement of active service are considered residents of Rhode Island during the time of service and for 30 days following.
A divorce in Rhode Island shall be decreed irrespective of the fault of either party on the ground of irreconcilable differences, which have caused the irremediable breakdown of the marriage. Divorces can also be decreed for the following fault-based causes:
The Rhode Island divorce court may assign to either the husband or wife a portion of the estate of the other. The court may not assign property or an interest in property held in the name of one of the parties if the property was held by the party prior to the marriage. Also, any property that has been transferred to one of the parties by inheritance before, during, or after the term of the marriage is not subject to distribution.
However, the court may assign income which has been derived from the property during the term of the marriage, and the court may assign the appreciation of value from the date of the marriage of property or an interest in property which was held in the name of one party prior to the marriage which increased in value as a result of the efforts of either spouse during the marriage.
In determining the nature and value of the property, if any, to be assigned, the court shall consider the following:
In determining the amount of alimony, if any, to be paid, the court shall consider:
A child custody determination in Rhode Island is based on the best interests of the child standard. In regulating the custody of the children, the court shall provide for the reasonable right of visitation by the natural parent not having custody of the children, except upon the showing of cause why the right should not be granted. The court shall mandate compliance with its order by both the custodial parent and the children.
In the event of noncompliance, the noncustodial parent may file a motion for contempt in family court. Upon a finding by the court that its order for visitation has not been complied with, the court shall exercise its discretion in providing a remedy, and define the noncustodial parent's visitation in detail. However, if a second finding of noncompliance by the court is made, the court shall consider this to be grounds for a change of custody to the noncustodial parent.
Child support payments in Rhode Island are based upon a formula and guidelines adopted by an administrative order of the family court. If, after calculating support based upon the court-established formula and guidelines, the court finds the order would be inequitable to the child or either parent, the court shall order either or both parents owing a duty of support to pay an amount reasonable or necessary for the child's support after considering all relevant factors including, but not limited to:
Child support may be ordered for children attending high school at the time of their 18th birthday and for 90 days after graduation, but in no case beyond their 19th birthday.
http://www.rilin.state.ri.us/Statutes/TITLE15/15-5/INDEX.HTM (Rhode Island divorce laws)