Dynamic Fracture and Deformation of Solid Propellant.
Abstract
Contributions to two distinct but related topics have been made: (1) high speed crack growth in linear viscoelastic media and (2) nonlinear viscoelastic constitutive equations for particle-filled rubber with microcracks. Both are relevant to the dynamic mechanical response of solid propellant. Work was completed and published 1 on the dynamic steady-state propagation of an antiplane shear crack in a general linear viscoelastic layer. An infinite series representation for the stress intensity factor was derived, each term of which can be calculated recursively in closed-form. A simple, universal dependence upon crack speed and basic material properties was found. These results represnt a significant step in understanding the influence of a physical dimenson (the layer thickness) on dynamic stresses in the neighborhood of crack tips in rate-dependent materials. Another paper is partly a summary of principal results in 1 and 3 and contains new material not published elsewhere. Specifically, the analysis of 3 was extended to derive the full stress field in the body. A much simpler form than was presented in 3 for the entire stress field ahead of and in the plane of the crack was exhibited and the angular dependence of the local stress field at the crack tip was calculated. Keywords: Micromechanics; Particulate Composites; Asymptotic expansion.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1986
- Accession Number
- ADA166424
Entities
People
- J. R. Walton
- R. A. Schapery
Organizations
- Texas A&M University