Fracture Mechanics of Inelastic Polymers.
Abstract
This first annual report covers progress on three related topics. (1) The fracture of various elastomeric materials (SBR and EPDM rubbers) is considered in the light of Andrews' theory of generalized fracture mechanics. The theoretical equation for the fracture energy J in terms of the true surface energy J(0), is used to predict values of J for comparison with experimental determinations, and good agreement is reported. (2) The theory states that for a nonlinear inelastic solid, the fracture energy for a center crack or SEN specimen is given by the equation J = k1 (epsilon 0) c W0 where c is the crack length and W0 the input energy density remote from the crack. The behavior of the function k1 (epsilon 0) has been studied for polyethylene and PET films and is reported; values for J are also given. (3) Preliminary work is reported on the theoretical prediction of fracture energies in a ductile, plastic polycarbonate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1976
- Accession Number
- ADA032044
Entities
People
- E. H. Andrews
- L. B. Ramirex De Molina
- S. Barnes
- Y. Fukahori
Organizations
- Queen Mary University of London