A Theory of Time-Dependent Bonding for Viscoelastic Media.
Abstract
A theory is developed for the prediction of time-dependent bonding of surfaces of similar or dissimilar linear viscoelastic materials. Starting with an extended correspondence principle, viscoelastic stresses and displacements in the neighborhood of a moving contact edge are derived. These results are then employed in a local energy balance which leads to an equation for predicting the rate of bonding as a function of the local displacement intensity factor. A comparison of true and apparent energies for bonding and fracture is made. Finally, criteria are given for determining whether or not bonding can occur, and then the prediction of the time required for complete bonding or healing of cracks is examined. This study will aid in the understanding and prediction of the very significant amount of time-dependent stiffening of polymeric composite materials which follows mechanical load-induced internal damage, as observed for example in solid propellant and tire tread rubber.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1976
- Accession Number
- ADA032827
Entities
People
- R. A. Schapery
Organizations
- Texas A&M University