Fracture Mechanics Approach to Cumulative Damage
Abstract
The report documents a 12-month program conducted to study cumulative structural damage in solid rocket propellant. Tests conducted and experimental data obtained therefrom are described, and conclusions drawn from the study are presented. The theory of fracture in viscoelastic materials provides the analytical expressions for evaluating damage to propellant during loading histories comparable to those which might be experienced by rocket motor grains. Poker chip and biaxial strip tensile tests were used to simulate the states of stress typically occurring in actual motors. Simple constant rate tests were used to evaluate the constants necessary to apply the fracture equations to histories involving sequences of loadings.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1968
- Accession Number
- AD0846599
Entities
People
- B. C. Harbert
- J. D. Burton
- J. S. Noel