Imperfectly constrained planer impacts — a coefficient-of-restitution model

✍ Scribed by G.G. Adams

• Book ID: 104344045
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 553 KB
• Volume: 19
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/s0734-743x(96)00053-x

✦ Synopsis

A simple coefficient-of-restitution model is proposed for the impact of a rigid body, constrained by an imperfect pin support, with a rigid barrier. The collision process is represented by two phases. In the first phase, the rigid body impacts the barrier with negligible influence from the support. The next phase is characterized by an impact between the rigid body and the imperfect pin support. This second phase commences when the impact with the barrier ceases. Both moving and stationary barriers are considered. For a moving barrier, energy can be added to the rigid body due to the work done by the friction force exerted by the moving barrier. Such a result is not predicted with the usual constrained impact formulation. Impact with a stationary barrier is characterized by continuous slip, slip reversal, or slip followed by stick. A 'constrained' coefficient of restitution is presented for these partiallyconstrained impacts.