Friction and Wear of Paper Type Wet Friction Elements

A simple model of the engagement process for paper friction materials has been conceived, consisting of squeeze film, squash film, and adhesive contact phases. In support of the model, laboratory test results are presented of paper clutch squeeze and squash film behavior in a new laboratory test fixture. Also scanning electron microscope photographs, profilometer data, and clutch inertia dynamometer friction and wear results are discussed in the context of the new engagement model.