すべり摩擦開始時の動的挙動

概要

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Transient behaviour from static to kinetic friction and the dynamic response of a contact surface were experimentally investigated on two bodies with a large contact area. Slip and tangential force at several locations over the contact surface were measured. Slip is initiated locally in a small region associated with a sudden decrease of local tangential force and propagates over the surface generating a stress concentration to break junctions in adjacent regions, finally followed by a large-scale slide between the two bodies. Propagation of slip depending on the intrinsic strength of junctions and their distribution on the contact surface can be increased to as high as the elastic stress wave velocity. It is also found that the unloading stress wave which is emitted from the slip region is reflected at specimen boundaries to the contact surface and plays an important role in its dynamic response.
1994-10-25