𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A Unique Failure Criterion for Characterizing the Fracture of Propellants

✍ Scribed by R. A. Gledhill; A. J. Kinloch

Book ID
105355130
Publisher
John Wiley and Sons
Year
1979
Tongue
English
Weight
442 KB
Volume
4
Category
Article
ISSN
0721-3115

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The problem of crack growth in a nitrocellulose/nitroglycerin propellant has been studied employing a continuum fracture mechanics approach. Values of the stress‐intensity factor, K~c~, at the onset of crack propagation have been ascertained and found to be dependent upon both the thickness of the specimen and the test temperature. By proposing that the value of K~c~ arises from the sum of a plane‐strain and a plane‐stress component a unique failure criterion, which is constant over a wide temperature range, has been identified. Namely, that crack propagation in the propellant occurs when the plane‐stress plastic‐zone at the crack tip attains a critical size.

πŸ“œ SIMILAR VOLUMES

High strain-rate impact studies of preda
High strain-rate impact studies of predamaged rocket propellants. I. Characterization of damage using a cumulative damage failure criterion
✍ S.Y. Ho πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 1013 KB

The effect of predamage on the high strain-rate behavior, ignition sensitivity, and impact ignition mechanism of a HTPB/AP rocket propellant was assessed using a modified Hopkinson Bar. Damage was induced by constant stress and monotonic tension tests prior to testing on the modified Hopkinson Bar.

A criterion for the time dependence of d
A criterion for the time dependence of dynamic fracture
✍ Floyd R. Tuler; Barry M. Butcher πŸ“‚ Article πŸ“… 1968 πŸ› Springer Netherlands 🌐 English βš– 309 KB

Dynamic fracture is a time-dependent phenomena in which the spall stress depends on the stress pulse duration. It is shown that the empirical relation between the spall stress and the square root of the stress gradient is equivalent to a simple impulse criterion. A more general criterion based on th